介绍了一种结晶器液压振动装置.该装置采用一个液压缸驱动装置,全板簧导向结构.进行了结晶器的三维模型的建立与网格划分,选取板弹簧力学模型与振动模型进行了结晶器系统固有频率的计算,得到结晶器的第一阶模态为左右偏摆振动,第二阶模态为上下垂直振动,计算得到的结晶器振动本体装置固有频率与现场振动偏摆测得数据相同,验证了理论方法计算的正确性和实用性.该计算方法可通过合理布置各部件达到最优的刚度布置,从而使振动装置的一阶、二阶振型达到最优,使设备各方向的偏摆控制到最小.

LadLeturretbutterfLyisoneofthemostimportantequipmentincontinuouscasting.Todesignnew Large scaLe LadLe turret butterfLy by the demand of Large scaLe LadLe. The strength behavior of Large scaLe LadLe turret is stiLL imperfectLy understood in spite of some research over past severaL years. In this paper,a FEM modeL has been es-tabLished to study the strength behavior of LadLe turret butterfLy during design period. The strength behavior of LadLe tur-ret butterfLy under different Load case has been discussed. The resuLts indicate that the design of LadLe turret is reLiabLe.

A 3D model and FEM model were established on the basis of 300t ladle turret.The impact coefficient is considered.The strains,stresses and displacements of all parts are obtained by analyzing FEM.The calculation result provides theoretical basis for the design and reconstruction of ladle turret.

Upper-loaded dummy bar system is used widely in a continuous caster.Automatic striping of dummy bar head turns reality because of the upper-loaded dummy bar system.The striping process is studied with co-simulation.The kinematic and dynamic parameters are given.The preferences to design and control an upper-loaded dummy bar system are provided.

Based on the example of U-section profile, the tensile instability in the bending process of asymmetrical profile was studied by plastic mechanics. The strain intensity of diffuse instability and localized instability were analyzed. In order to avoid tensile instability, the formula to calculate the minimum bending radius of asymmetrical profile was presented. Through a practical example, the simulation results were compared with analytical solution. The results indicate that the strain intensity of diffuse instability is less than that of localized instability, which is related to the stress state and the hardening exponent of material. The minimum bending radius is related to the mechanical behavior of material and the dimension of cross section.

Through the dynamic analysis, a mathematic model of the main driving system of cold Pilger mill has been built. The dynamic virtual prototyping model of the main driving system of a cold Pilger mill is established based on ADAMS and Pro/E, the simulation is carried out and the results are analyzed. The dynamic properties of the main driving system are resolved based on the different types of rolling force distributions, and references are provided for the design of cold Pilger mills.

Based on the example of the U-section profile,the section distortion in the retract-bending process was simulated by the aid of the explicit dynamic FEM software ANSYS/LS-DYNA. The change law of the lateral offset of the flange in different longitudinal and radial positions was mainly analyzed. The results indicate that the lateral offset of different nodes is approximately linear to the distance from the node to neutral plane. The lateral offset of the end of flange is biggest. The half-wave length is almost basically identical in different radial positions.

Based on the theory of the simulation and analysis of muti-body dynamics and dynamic virtual prototyping technology, the simulation method of the main driving system of cold Pilger mill is discussed. The dynamic virtual prototyping model of the main driving system of cold Pilger mill is established based on ADAMS and Pro/E, the simulation is carried out and the results are analyzed. The dynamic properties of the main driving system are resolved based on the different types of rolling force distribution, and references are provided for the design of cold Pilger mills.

Based on the example of U-section aluminum profile,the release-bending process was simulated by the aid of explicit dynamic FEM software ANSYS/LS-DYNA. The distribution of equivalent plastic strain and tangential strain were mainly analyzed and the approximate formula to calculate the minimum bending radius was presented,which are helpful to determine the dangerous positions and avoid the phenomenon of instability. The results indicate that the strain of the end of flange are bigger than those of web. The end of flange is the dangerous position of cracking in bending process.

SG18-H mill is a new Chinese-built strip mill with high accuracy.The breakage of the intermediate roll and the scattering-down of the roll cluster have been the main problems that affect the normal production since the mill was put into production.The stress characteristics are analyzed through dynamical simulation with ADAMS and site experiments.Based on stability theory,the paper uses energy method to analyze the stability of the mill structure,and the reason why the breakage and the scattering-down happen.The result shows that this new kind of mill can be in unstable balance condition if the intermediate roll is not restrained at the both ends.The assembly precision and constraint status of intermediate roll are the key factors that keep the roll system stable.The results can provide references for the improvement and design of the mills.

A discussion has been made on the problems of balance for shocking force and moment of the commonly used crank slider mechanism in machinery.A kind of novel attached balancing mechanism was put forward.By means of the kinematics and dynamics analysis on the mechanism,balancing conditions of shocking force was presented.The shocking moment after the complete balance of shocking force can get partial balance through the adjustment of eccentric gear in the attached mechanism.In accordance with the principle of mean square root value of shocking force to be a minimum,the concrete position of the rotary center of eccentric gear was determined.The added mass of the mechanism proposed in this paper is comparatively small and need not to increase translation pairs. This mechanism can be simplified for use in engineering practice.

基于弹塑性理论的型钢辊式矫直压弯挠度一直难以得到工程适用的精确解.通过建立适当的矫直力学模型,结合计算机和数学分析,求出了型钢辊式矫直的反弯挠度与力、力矩的数学关系,并与传统及工程采用的方法比较,证明更符合实际情况和矫直理论.同时以H型钢为典型做了全面研究.对工程上工艺参数的制定有重要价值.