Based on the system design conception,the retractable dome mechanical and control system of Nantong Stadium is analyzed,including the retractable actuation system,traveling bogie structure and synchronized control strategy.Accordingly,this system is proven as a typical,sophisticated and reliable mechatronic system for large-scale retractable dome,which can be referred to resemble designs in the future.

Taking an over 400-meter-high building as object, through predigesting the structure in the finite elements and analyzing the structural connection, a hybrid finite element model of a building hoist with different types of elements is built up. The stresses and stability of the hoist are calculated through the finite element software, and based on the correlative rules, the load factor, load combinations and loading ways.Reasonable projects and the optimal hoist structure are given to solve the new problems of the structural design during the finite element analysis. The results and related discussions may be references for higher and faster hoist in the future.

This paper put forward a coupling vibration partial differential equation of the crossbeam,dolly and weight suspension system of the shore container crane on the basis of Hamilton principle.By adopting method of finite element,the modality of beam under the complicated boundary conditions was found out.Let the obtained modality parameters be substituted into the coupling vibration partial differential equation and transform the complex partial differential equation into the variable coefficient nonlinear ordinary differential equation set to acquire the numerical value solution of equation by the method of Runge-Kutta.The effectiveness of this method was verified by means of numerical valued calculation example,and thus a kind of simple and convenient computing method was provided for the common firm and flexible coupling vibration problems in engineering.

A new parking control method is proposed to guide the parking of auto-guided vehicle(AGV) which has two working patterns:normal pattern and parking pattern,and is used for tran-sporting containers in port.An optimal path from current place to ready-to-parking place is planned first;then FLC is used to guide AGV to follow the planned path;the control parameters within membership function are optimized by using genetic algorithm(GA) to reduce the tracking error between real running path and the planned path.Numerical results show that this method is feasible and effective.

This paper studies the positioning and anti-sway control of an quayside container cranes.Based on Passive methods,an control Lyapunov function is constructed and an stabilization control law is obtained.Theoretical analysis and numerical simulation shows the controller for the anti-sway control and positioning control has strong robustness.

Through the virtual prototype technology and the analysis to the structural characteristics of the C-type of train tipping machine,this paper establishes a digital model for the whole machine,finishes the virtual assembly and the structural analysis for its steel structure,and makes a verification for the structural strength,it effectively puts the computerization in numerical analysis into the development for the construction machinery.

生产率为6 000 t·h-1装船机是港口散货输送的核心设备之一,结构(包括臂架系统)新颖且较复杂.应用有限元软件,建立6 000 t·h-1装船机臂架部分双肢、四肢钢结构的有限元模型进行2种设计方案的选型比较,对结构强度进行分析及验算,得出了2种结构的优缺点及适用范围.

针对集装箱起重机复杂的动力学模型,使用ANSYS软件对其有限元模型进行结构动力修改.首先通过模态分析确定结构的振动特性,确定优化目标;以关键部位的板厚为设计变量进行优化,并对优化结果作了灵敏度分析以判断离散设计变量的取值方向.优化结果较大地提高了集装箱起重机的动力性能,表明了ANSYS软件能处理复杂模型动力学优化问题的可行性和有效性.

A kind of integrated model based on theory of axiomatic design and solving theory of invention problems has been put forward. The advantages of axiomatic design consist on flow decomposition and the advantages of TRIZ consist on solution of conflicts. To obtain the innovative scheme of non-coupling or decoupling design by means of integration, and then to compare the information amount of schemes so as to select the best of them. An application example on heating device of waste and used asphalt mixture explained that the method being advanced could make effective guidance on the scheme design of mechanical products.

By combining the matrix of designing structure with the index of designing parameters,the amount of information for thematrix expression of designing structure was extended and the development course of design was reflected quite comprehensively.The development course of design for the bridge typed crane dolly was analyzed by applying this extended designing matrix and its designing course was modularized.By means of the recomposition of designing activity,the coupling extent of the original designing course was lowered.

A novel hybrid model is proposed based on axiomatic design (AD) theory and innovative design (i.e. TRIZ) theory. Moreover, the advantage of AD involves process decomposition, whereas TRIZ aims at confliction resolving. Upon completion of uncoupled and decoupled design alternatives, the optimal design option can be then obtained regarding information sources. For the purpose of engineering design, a case study on waste asphalt mixture heater design is used to illustrate the effectiveness of the proposed model.

Parameter optimization is considered in this paper to improve stability of automatic guided vehicle(AGV),and the restriction of parameters is relaxed in order to make AGV system more stable.Three conclusions can be drawn from simulation: stablilization control parameters have great influence on the stability of AGV;the optimal parameters are different if original position of AGV is changed;the stability of AGV can be greatly improved by optimizing control parameters.

Tracking precision of automatic guided vehicle(AGV) is greatly influenced by the parameters in control law.To deal with this problem,control variables are switched to wheels at first to allow the control strategy being carried out in real control system,then,parameter optimization using Genetic Algorithm is carried out in this paper to reduce tracking errors.Three viewpoints can be drawn from simulation: 1.tracking control parameters have great influence on tracking precision;2.the same parameters have different influence on tracking precision if original position of AGV is changed;3.tracking precision can be greatly improved by optimizing control parameters.

目前我国所建造的体育场均采取露天形式,在建的南通体育场大胆采用了开闭屋盖结构,造型类似"飞碟",屋盖可开闭自如,这在国内尚无先例.

According to stress minimization and material utility,which are two major aspects of structural optimization in a wide range of engineering designs,a stress estimate parameter is introduced and derived in this paper.Then a new stress criterion is presented for the problems of minimizing the maximum stress while low-stressed elements are removed.On the basis of finite element analyses stresses and stress estimate parameters,a new evolutionary structure optimization method and its procedure are proposed.During structural topology optimization,it can deal with the effect of both local von Mises stress level and structural intrinsic cross property.Comparison between two different methods on a cantilever optimization is made.The numerical example demonstrates that the proposed method is of great capability in reducing maximum von Mises stress,and is more valid and effective than the conventional evolutionary structural optimization(ESO) method based on stresses.

This paper issues the types and characters of the mechanical driving system of the retractable roof of large stadiums.And then it analyses the mechanical driving devices of the retractable roof in Nantong city in detail.At last it discuss the key design point of the travelling device:Fully considering how the system coordinates and joins the deformation between the arch and the retractable roof.

With finite element analyse,a container crane's mechanical parmeters are achieved.The reverse engineering and the theory of superposition are used in this process.The original parameters can provide useful data for renovation of the crane

This paper focuses on path planning and fuzzy logic controlling of an automatic guided vehicle (AGV)in partially known environment.A method combined of global path planning and local fuzzy logic con- trolling is proposed.This method can not only effectively utilize the known environment information,but also offer a short path that is free of obstacles.Simulation results show that the method proposed by this paper is of effectiveness and is suitable for application.

健壮性设计是质量工程中一种重要的方法.从这个概念出发,基于产品健壮性设计理论,结合有限元分析和优化设计技术,考虑多种工况,对汽车衡结构进行优化设计.