This study made multi-support seismic simulations for a saturated half-space with buried tunnel and seawater convex topography with P1-waves incidence.Effect of the resulting seismic motions was thor-oughly investigated on the nonlinear response of a long-span bridge crossing the specific terrain.First,the frequency-domain solution for P1-waves is theoretically derived to obtain the auto-spectrum.Cross-spec-trum is obtained by introducing a water-covered coherent model coupled with the transfer function.Con-struction of underground power spectral matrix is finally performed for the site,which enables the realiza-tion of multi-support seismic motion.Rationality of the resulting seismic motions is further validated.Then a detailed discussion is conducted about the effects of tunnel burial depth and coherent functions on seis-mic characteristics.Finally,the generated seismic motions are regarded as"free field input"and directly applied into the system of"artificial boundary-soil-constitutive finite element model"in the form of equiv-alent nodal forces.Nonlinear response analysis of the continuous rigid-frame bridge subjected to under-ground multi-support motions is further made.Results indicate that:①Amplitude of underground multi-support seismic motion for shallow-buried tunnels exceeds that for deep-buried tunnels.②With the in-creasing tunnel depth,the peak internal force response of the bridge decreases.③Spatial variability of seismic motions obtained from the water-covered coherent model is significantly enhanced compared to the traditional one.④Under seismic excitation generated by the water-covered coherent model,the peak re-sponse of the bridge generally surpasses that obtained from the traditional one.⑤Under the excitation of multi-support rare earthquakes using the water-covered coherent model,the initial failure time of the bridge is significantly advanced.
In view of the fact that the mechanical stability law of buried faults in the surrounding rock of gas storage is not clear,the numerical simulation method is used to establish the thermal-fluid-solid cou-pling model of compressed gas energy storage by taking the abandoned coal mine underground gas storage with fault surrounding rock as the research object.The influence of faults on the stability of gas storage and the influence of sensitive parameters such as gas injection rate,cycle period,fault dip angle and buried depth of gas storage on the stability of faults are analyzed.The results show that the fault increases the maximum radial displacement of the side of the cavern,but decreases the maximum radial displacement of the top,which has the effect of resisting the surface uplift damage.Among the fault sensitivity parameters,the buried depth has the greatest influence,the fault dip angle is second,and the gas injection rate is the smallest.With the increase of gas injection rate and cycle period,the sliding trend of the fault increases linearly,and the safety factor FOS of the fault decreases linearly.With the increase of buried depth,the sliding trend of the fault increases exponentially,and the safety factor FOS of the fault decreases exponen-tially.When the fault dip angle is 70°,the stability of the fault is the largest,reaching the extreme point of the parabola.The conclusions obtained provide a scientific reference for the service life and safety of gas storage.
Studying the aerodynamics and flight mechanics of discus throwing and accurately predicting trajectory of the discus can help athletes improve their performance in competition by using optimal thro-wing strategies.In this study,numerical virtual flight simulation is adopted to solve unsteady Reynolds av-erage Navier-Stokes equations combined with rigid body dynamics equations,taking into full consideration of unsteady effects caused by coupling aerodynamics and motion.By predicting the trajectories and motion attitude of discus under different throwing parameters,such as spin rate and initial attitude angles,the in-fluence on discus flight distance is investigated,and the optimal combination of throwing parameters that maximizes the flight distance is determined.The results reveal that significant aerodynamic hysteresis exists in discus stall under a high angle of attack.However,the stall and aerodynamic hysteresis can reduce the precession speed of the discus and significantly influence discus trajectory.Therefore,accurately simula-ting the aerodynamic hysteresis is crucial for predicting trajectory and motion attitude of discus.By increas-ing spin rate and specifying appropriate initial roll and pitch angles,the precession speed of the discus can be reasonably controlled,and the aerodynamic force can extend the hang time of discus.Thus discus flight distance can be effectively improved.
Objective To explore the effects of biomechanical characteristics of different landing modes on ankle joint injuries in basketball players.Methods A total of 42 second-class male basketball athletes were recruited as experimental subjects.According to their landing mode,they were divided into two types:run-ning and sudden stop with both legs taking off and landing on the forefoot(referred to as forefoot landing)and running and sudden stop with both legs taking off and landing on the hindfoot(referred to as hindfoot landing).The motion capture system and three-dimensional force platform were used to collect and analyze the angles of the three joints(hip,knee,and ankle)at the instant of contact(IC)during the two landing modes of the subjects,as well as the peak joint angles during the cushioning phase and the peak ground re-action force(GRF)during the cushioning phase.Results Compared with the hindfoot landing mode,the forefoot landing mode exhibited greater angles of hip flexion,hip adduction,knee flexion,knee varus,ankle dorsiflexion,and ankle inversion at the IC(P<0.05).In the cushioning phase,the forefoot landing mode exhibited greater peak angles in ankle plantarflexion,hip flexion,and ankle inversion,while the hindfoot landing mode demonstrated greater peak angles in ankle dorsiflexion,hip abduction,knee extension,and ankle inversion(P<0.05).Compared with the hindfoot landing mode,the forefoot landing mode had a lar-ger peak GRF in the anterior direction and a smaller peak GRF in the lateral direction(P<0.05).Conclusion Different landing modes of basketball players are different in IC joint angle,joint peak angle in buffer stage and GRF peak in buffer stage,and ankle joint injuries are more likely to occur in forefoot landing mode.Therefore,basketball players can appropriately strengthen the training of hindfoot landing mode in daily training,strengthen the strength training of lower limb related muscles,and pay attention to the training of buffer skills when landing,so as to further prevent ankle joint injuries.
Numerical simulation is one of the important methods to study the mechanical behavior of irregu-lar particulate systems.Generation of three-dimensional numerical models of irregular particles and encap-sulation technology are important research topics.To create a numerical model of irregular particles,a pro-gram that generates irregular particles and an intuitive interface for the program were developed by using the C#platform.First,based on the geometric property information of three-dimensional convex irregular particles,the particle information data structure characterized by object-oriented methods was designed.Then,the 3D random aggregate packing algorithm was applied to develop the software for automatic gener-ation and conditioning of irregular particles.Using the C#platform,a user interface to control model gener-ation and export was designed,and an interface that renders 3D animations for particle models using the graphics library OpenGL was developed.A 3D printed output data file in the program software was also de-signed,which can quickly generate real particles through a 3D printer.Real printed particles can be used as specimens for experiments on irregular particles.The generation method of model data output file in the program for discrete and finite element analysis was also provided.Finally,irregular particle packing exper-iments were performed and also simulated by FEM.The results show that the program we developed can meet the requirement of quickly creating numerical models of irregular particles that can be applied to ex-periments and numerical simulations.
Two-photon polymerization(TPP)manufacturing technology with 100 nm printing accuracy is a powerful tool for high-quality and high-precision fabrication of complex structures at micro-and nano-scales.However,the basic properties of materials and optimal printing process for TPP additive manufac-turing are still not clear,which limits its application in complex performance requirements design.There-fore,this paper studies the optimal printing process of photosensitive polymer resin(IP-Dip)material of typical experimental test samples and gives the setting of different parameters such as laser power and writ-ing speed.The micron-scale pillar and lattice structure were printed,and the uniaxial compression test of the sample was carried out by the SEM/FIB nano-mechanical testing system.The Young's modulus of the material was given,and it was found that the nano-scale lattice structure had typical delamination failure and unloading rebound phenomenon during the compression process.
In order to improve the passive safety performance of automobiles and energy absorption per-formance of automotive energy-absorbing boxes in crashes,a new type of gradient density aluminum foam conical automotive energy-absorbing box with induced grooves is proposed.Using ABAQUS commercial fi-nite element software,the calculation is carried out to study the impact performance of the gradient density aluminum foam tapered box with induced grooves.The effects of the density gradient of the aluminum foam,the design of the induced grooves,and the design of the tapered tube on the impact performance of the boxes are investigated,and the deformation mechanism of the box and the energy-absorbing character-istics is revealed.It is found that compared with the box filled with homogeneous aluminum foam and with a bottom angle of 90°,the box with a bottom angle of 85°,filled with negative density-gradient aluminum foam and with an induced groove,has a 44%improvement in specific energy absorption,a 16.9%reduc-tion in the peak collision force,and an efficiency of 92.18%in the compression and collapsing force.A lightweight,excellent energy absorbing,stable deformation process,and low load-bearing design scheme for automotive energy-absorbing boxes has been proposed through optimized design.
With the rapid advancement of aviation technology and industrial capabilities,the monitoring,diagnosis,prediction,and assessment of aero-engine health status have become increasingly critical.These capabilities are essential in ensuring high performance,operational stability,and reliability throughout the engine lifecycle.Aero-engine structural health monitoring(SHM)enables continuous observation and e-valuation of the engine's structural condition during flight tests and throughout its service.By applying sci-entific methods in fault diagnosis and isolation,predicting structural health trends,and assessing real-time conditions,condition-based maintenance of engine structures can be achieved.This approach enhances the engine's reliability,maintainability,and fault tolerance,while also improving its ability to respond to unex-pected events and reducing life-cycle costs.As a result,aero-engine SHM and assessment technologies have attracted significant attention.This paper focuses on SHM and evaluation technologies for aero-en-gines.It systematically analyzes the necessity of engine health monitoring in ensuring the healthy,stable,and safe operation of both the propulsion system and the aircraft,as well as its role in improving mission completion rates and reducing life-cycle cost ratios.The research status of engine health monitoring at home and abroad is elaborated in detail.Furthermore,the paper reviews recent progress in advanced sens-ing technologies,monitoring systems and methods,techniques for typical fault feature extraction,and health assessment methodologies applied in aero-engine SHM.Finally,future development trends in aero-engine SHM and assessment are discussed.
In order to study the mechanical properties of the process of the river crossing pipeline from the buried to the overlying soil gradually reduced so that the pipeline is completely suspended,this paper uses ABAQUS finite element software to establish a dynamic finite element model based on the life and death u-nits technology for an X80 gas pipeline,where the length of pipeline suspension gradually increases as the overlying soil decreases.The paper analyzes the effects of flood flow velocity,undercut angle,diameter-thickness ratio,operating internal pressure,and burial depth on the mechanical behavior of river crossing pipelines.Sensitivity analysis is used to obtain the degree of influence of each factor on the stress of the river crossing pipeline and rank them accordingly.The results show that the maximum equivalent stress,displacement,and strain of the pipeline under different parameters increase the fastest during the 20-30 m suspension period.The maximum equivalent stress is positively correlated with flood flow velocity,diameter,and operating internal pressure,while it is negatively correlated with the wall thickness of the pipeline.The undercut angle is positively correlated with the maximum equivalent stress during the suspen-sion process.When the suspension length reaches a certain value,the undercut angle and burial depth have little effect on the maximum equivalent stress.However,the undercut angle is positively correlated with displacement,while the burial depth is negatively correlated with displacement.The degree of influ-ence of each factor on the maximum equivalent stress of the river crossing pipeline is ranked as follows:wall thickness>flood flow velocity>operating internal pressure>burial depth>undercut angle.These findings can provide basis for pipeline planning and design requirements and improve its safety.
To study the effect of double circular holes on the mechanical properties of rocks and the crack extension process,a uniaxial compression model for rock specimens containing double circular holes was constructed,and the correctness and rationality of the numerical model were verified based on the compari-son of the macroscopic mechanical parameters obtained from experiments and simulations.In addition,the crack extension process of specimens containing double circular holes and the evolution of the stress field around the circular holes were analyzed.The results show that the numerical simulation results are in good agreement with the experimental results;the initial tensile crack first sprouts at the upper and lower ends of the circular hole,and with the increase of axial stress,structural weak zones are usually formed at the left and right sides of the hole wall.The sprouting direction of the initial tensile crack is in the axial load-ing direction,independent of the orientation angle α,but the damage pattern of the specimen is influenced by the orientation angle α.The initial tensile crack is generated in the tensile stress concentration area;the tensile stress concentration area at the upper and lower ends of the circular hole moves and dissipates ac-cordingly with the expansion of the initial tensile crack.The compressive stress concentration area of the stress component σyy is located on the left and right sides of the circular hole,while a shielding area of compressive stress is formed at the upper and lower ends of the circular hole,and the smaller the distance from the vertical center line of the circular hole,the stronger the shielding effect and the weaker the com-pressive stress.
Objective To improve the quality and efficiency of the mesh in the finite element model of the knee joint by using the cell-based smoothed finite element method(CS-FEM).Methods The gradient smoothing technique is introduced on the basis of the traditional finite element method,and CS-FEM is used to mesh the finite element model of the knee joint,and to compare which of the two methods(traditional finite element method and CS-FEM)is more accurate for the experimental data of the previous study.Results CS-FEM is more accurate and reduces the complexity of meshing than the traditional finite element method,and reduces the number of cells,making the solution process more efficient.Conclusion The conventional FEM methods offer high computational accuracy and stability when dealing with relatively simple geometries and linear materials due to their wide application and maturity.Howev-er,in biomechanical simulation of complex structures and nonlinear materials,CS-FEM provides higher computational efficiency and accuracy by optimizing meshing and reducing stress concentration.There-fore,CS-FEM is expected to be more widely used in the modelling of knee joints and other complex bio-logical structures in the future.
Against the characteristic of large deformation for reinforced concrete(RC)frame,RC frame-frame truss composite wall(FTCW)structure was proposed,and two reinforced concrete(RC)frame-frame truss composite wall(FTCW)specimens with a scale of 1∶2 were implemented for cyclic loading test.The seismic performance of bearing capacity,ductility and stiffness degradation were analyzed by the test phenomenon,hysteresis curves,backbone curves and stiffness degradation curves.The simulation of cyclic loading test was conducted by ABAQUS software,and the results were compared with the test re-sults.The influence of the amount of infill FTCW,rebar ratio of RC frame columns,axial compression ratio,concrete strength,embedded angle steel and the layout direction of FTCW were analyzed.The test behav-iors showed that a multistage energy consuming system that FTCW worked before RC frame and the inter-nal diagonal struts worked before the outer frame inside the FTCW,forming a multistage energy consump-tion system for the design purpose of earthquake resistant structures.The numerical analysis results showed that the most effective way to improve the bearing capacity of RC frame-FTCW was to increase the amount of filled FTCW,followed by increasing the rebar ratio of frame columns,and the improvement of increasing the concrete strength or adding angle steel for the internal diagonal struts were smaller.The improvement of axial compression ratio on the bearing capacity was unnoticeable.In addition,the layout direction of FTCW was significant,and the number and position of FTCW should be symmetrically arranged.
In this paper,the effects of doping elements(Re and Ru)content on the stability and occupan-cy orientation of a Ni-Al binary model nickel-based single-crystal superalloy are studied by using first-principles calculations.The results show that the total energy of the system decreases gradually with the increase of the content of Re and Ru elements,which suggests that the stability of the system is improved.The system using Ru to replace Ni has the lowest stability,while the stability of system is the best by u-sing Re to replace Al.Therefore,Re and Ru are more inclined to replace Al,which is consistent with the previous experimental results.Meanwhile,compared to other contents of Re and Ru,when Re and Ru with the content of about 1.4％are used to replace Al,the substitution formation energy is the lowest.Furthermore,two different stacking fault modes are obtained by deleting a layer of atoms in the Ni-Al bi-nary model.Research on these two stacking fault modes indicates that replacing Al with Re and Ru can improve the stability of the systems,and systems containing Re are more stable,which have lower substi-tution formation energy compared to replacing Al with Ru.However,for different stacking fault modes,when replacing Al with Re and Ru,the content of Re and Ru is different for the best of a stable system and the lowest of substitution formation energy and stacking fault energy.Replacing Al with Re results in a better stability in stacking fault systems,but the content of Re in the most stable system depends on the selected stacking fault mode.
Piezoelectric materials can be used to capture ocean wave energy,converting it directly into e-lectricity.The combination of piezoelectric membrane and flexible membrane to form a submerged break-water structure can be used as a new type of wave energy conversion device,which has the dual functions of wave energy generation and wave dissipation.In this paper,the dimensionless motion equation of the pi-ezoelectric flexible membrane system was derived,and the interaction between the wave and the flexible piezoelectric membrane structure was studied by the numerical wave flume based on the potential flow the-ory.A method for predicting the additional mass of the flexible piezoelectric membrane was presented,and the main control parameters which affect the motion response of the flexible piezoelectric membrane were discussed.The response of the flexible piezoelectric membrane under wave action satisfied the nonlinear vibration differential equation,and the nonlinear term was controlled by the dimensionless elastic modulus E* of the membrane.The resonant period of the flexible piezoelectric membrane was obtained,and the fit-ting formula of the dimensionless additional mass of the flexible piezoelectric membrane was given.When the dimensionless initial tension T0* ranges from 1.31 × 10-5～6.33 × 10-4,the critical control parameter E*is given.The results can provide theoretical basis for the design and engineering application of flexible piezoelectric membrane structures.
In order to meet the requirements of lightweight structure and energy-absorbing box,and to de-sign and study the performance of excellent energy-absorbing box structure,we adopt Abaqus finite element software to simulate the quasi-static axial compression behavior and lightweight design of gradient alumi-num foam conical energy-absorbing box.First,the validity of the finite element model was verified by com-paring with the literature experiment.Then,the effects of the conical bottom angle,the number of induction slots,the height and depth of induction slots,and the gradient material parameters on the energy absorption characteristics of the gradient aluminum foam conical energy-absorbing box were studied.Then,with the same mass structure of low peak load and excellent energy absorption as the optimization objectives,the gradient aluminum foam packed conical energy-absorbing box structure was optimized.The results show that these factors have a good effect on improving the energy absorption characteristics of the energy-ab-sorbing box.The conical bottom angle of the energy absorbing box can greatly increase the specific energy absorption of the energy absorbing box structure while reducing the initial peak force,and reduce the crushing force in the collision process to a certain extent.The existence of the induction groove makes the deformation process approach to the idealized symmetric deformation.While guiding the deformation process,it also reduces the initial peak force,the height and depth of the induction groove have a greater role in reducing the peak force and increasing the specific energy absorption.The density gradient of foam aluminum and the number of divided layers have obvious effects on reducing the impact force,and have certain effects on guiding lightweight and improving specific energy absorption.Compared with the constant section energy absorbing box,the optimized structure of gradient aluminum foam cone energy absorbing box reduces the maximum peak force by 20％and increases the specific energy absorption by 3.6％.It is found that the collision force-displacement curve is milder,which is more conducive to the energy absorp-tion of the energy-absorbing box.
Low-dimensional functional composites due to their exceptional functional properties have found critical applications in various fields such as aerospace and energy industries.This review focuses on theo-retical and numerical homogenization models for the effective functional properties of low-dimensional functional composites.First,an introduction to widely used static,dynamic,and numerical homogenization methods is provided,along with a detailed discussion of the involved fillers,frequency-dependent electric interfacial effects,and thermal interfacial effects.Then,theoretical and numerical homogenization models for the functional properties of low-dimensional functional composites are presented,including electrical properties,electromagnetic shielding performance,energy storage properties,thermal properties and multi-field coupling properties.Last,future development directions for low-dimensional functional composites are prospected.
Objective To explore the impact of rapid stretching compound training on the specialized quali-ties of volleyball players so as to provide scientific methods for volleyball training.Methods This study randomly selected 30 volleyball players and divided them into experimental group and control group using a random array method,with 15 players in each group.They received 8 weeks of rapid stretching com-pound training(including 30-40 cm box jumping depth and 50-60 cm box jumping)and traditional re-sistance training(including barbell squats,bench presses,and hard pulls).Before and after training,the jumping ability of the athletes was tested by using standing long jump and vertical jump to touch height,and their mobility was evaluated by using 30 m acceleration run and"cross"directional run.We measured their rapid directional change ability through Nebraska testing and Illinois testing.We also tested their a-bility to change movements with 15 seconds of standing and lying support,drilling and jumping over the fence,and repeated horizontal steps in 15 seconds.The"cross"quadrant jump,hexagonal jump,and hexa-gonal ball grabbing were used to test the players' coordination and control ability.We compared and ana-lyzed the test results of lower limb explosive power(jumping ability and movement ability)and agility(rapid direction change ability,movement change ability,coordination and control ability)of two groups of athletes before and after the experiment.Results There was no significant difference in various indicators between the two groups before training(P＞0.05).After training,the experimental group showed signifi-cantly higher improvements in jumping and mobility indicators in terms of lower limb explosive power com-pared to the control group(P＜0.05).In terms of sensitivity,the experimental group performed outstand-ingly in the Nebraska test,Illinois test,and other tests for rapid change ability(P＜0.05).In the test of action transformation ability,the effects of the 15-second standing and lying support and drilling and jump-ing bar tests were similar between the two groups(P＞0.05),and the experimental group had a signifi-cant advantage in the 15-second repeated horizontal step test(P＜0.01).In the coordination and control ability test,the rapid stretching compound training performed significantly better than traditional resistance training in tests such as"cross"quadrant jumping,hexagonal jumping,and hexagonal ball grabbing(P＜0.05).Conclusion Rapid stretching compound training has a significant effect in improving the explosive power and agility of volleyball players' lower limbs.Compared with traditional resistance training,rapid stretching compound training has significant advantages in volleyball specific qualities such as vertical jumping,complex directional changes,and coordinated control.This training method has important practi-cal significance for enhancing athletes' lower limb muscle strength and improving their rapid response abil-ity.
Objective To explore the influence of different running speeds on the kinematic and dynamic characteristics of the lower extremities and the distribution of plantar pressure of male athletes.Methods Fifteen students majoring in physical education from the School of Physical Education of a certain universi-ty were selected.With the help of the treadmill speed setting,they were evenly divided into 7 km/h(low speed group),11 km/h(normal speed group),and 14 km/h(fast group).The Footscan insole system,Vicon motion capture system and Bertec three-dimensional force measurement running platform were re-spectively adopted to precisely measure the lower extremity kinematic parameters(spatio-temporal parame-ters,joint angles),lower extremity dynamic parameters(ground reaction force,peak torque of joint flexion and extension,peak power,work done)and plantar pressure indicators(peak pressure,pressure load)of each group of athletes The rates,peak pressure values,and pressure loading rates were obtained,and the results were compared and analyzed.Results Compared with the normal speed group and the low speed group,the gait period was significantly shortened,the touchdown time was significantly reduced,and the stride length and stride frequency were significantly increased in the fast group(P＜0.05).The maxi-mum knee flexion angle increased with the increase of running speed,and the dorsiflexion angle at the mo-ment of ankle contact decreased first and then increased with the increase of running speed(P＜0.05).With the increase of running speed,the impact peak,push and stretch peak,average load ratio,maximum load ratio and maximum driving force of ground reaction force showed a significant increasing trend(P＜0.05).However,there was no significant difference between knee peak torque and knee peak power(P＞0.05).Meanwhile,there were significant differences(P＜0.05)in the peak pressure and pressure loading rate between the prefoot middle area and the heel area among the three groups of athletes,and they increased with the increase of speed.There was a significant difference in the peak plantar pressure be-tween the normal-speed group and the low-speed group(P＜0.05).There was no significant difference in the pressure loading rates of the anterolateral and midfoot regions among the three groups of athletes(P＞0.05).Conclusion The increase of running speed has significant effects on the distribution of plantar pressure and lower limb biomechanical parameters of male athletes.Therefore,speed should be reasonably adjusted according to individual conditions and training objectives in running training to optimize running efficiency and reduce the risk of sports-induced injury.
Steel-ultra-high performance concrete(UHPC)composite structures are characterized by their ability to effectively utilize the material properties of both UHPC and steel.They have significant advanta-ges in reducing the self-weight of the structure,improving structural stress state,and enhancing bearing ca-pacity.Therefore,these structures have experienced rapid development in the field of bridge engineering.To promote the application of stud shear connector in steel-UHPC composite structures,this paper first re-views the research history of UHPC and stud shear connector.It then summarizes the experimental methods for shear connectors.After that,it presents the status quo of research on the factors affecting the mechani-cal performance of shear connectors in steel-UHPC composite structures,with the focus on concrete param-eters,connector parameters,and other influencing factors.The paper also summarizes and compares the predictive performance of various physical formulas for the bearing capacity of stud shear connector in steel-UHPC composite structures.Additionally,it explores the application of artificial intelligence technolo-gies in the auxiliary design of shear connectors.Finally,the paper outlines future research directions for stud shear connector in steel-UHPC composite structures.
飞行试验是飞机设计验证和鉴定最真实有效的终极手段。某大型飞机主起落架采用了新颖的串联多支柱形式，起落架结构传力和所受着陆撞击载荷复杂，飞行验证的技术难度很大。分析了该起落架串联多支柱的结构特点和各支柱间相互协同承载情况，设计了测载应变电桥，针对性设计了包含模拟支柱间协同承载关系校准工况的“一体化”载荷校准方案。针对应变电桥载荷响应特性分析中变量多、数据量大的问题，开发了通过偏相关系数对应变电桥载荷响应的线性度进行评价的新方法。提出了计及校准误差对测量结果影响的载荷测量模型鲁棒性概念并推导了其数学评价指标。构建了基于对应变电桥的响应系数及偏相关系数加权平均并排序，可兼顾鲁棒性和拟合优度的载荷测量建模新方法。给出了应用该模型实测的某飞机典型着陆撞击载荷，定性分析了其变化规律，定量评估了其幅值。结果表明，起落架载荷校准与建模方法正确，可供相关工程技术人员参考借鉴；实测着陆撞击载荷变化规律清晰、合理，量值正确，为设计鉴定和改进提供了重要依据。
