Distinguished scientific awards for an early career contribution to psychology: S. Marc Breedlove.

Presents the citation, biography, and selected bibliography for S. Marc Breedlove, one of the 1987 recipients of the American Psychological Association's Distinguished Scientific Awards for an Early Career Contribution to Psychology. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

钢板仓输料桁架动力特性的有限元分析

应用有限元分析理论对钢板仓输料桁架进行动力分析,得到输料桁架的应力分布和位移变化过程图. 通过分析,能对钢板仓输料桁架的结构设计提供有益的参考.     

钢管定减径过程有限元模拟的若干问题处理

论述了采用大型非线性有限元分析软件Marc模拟钢管定减径热轧过程中碰到的若干问题及其解决方法。重点在于解决模型的建立与简化、边界条件的定义、温度场的参数设定、接触定义等方面遇到的实际问题,为研究同类问题提供参考。     

浮钳盘式制动器制动块有限元分析及结构优化

应用运用MSC Marc对制动块进行接触分析,得到其应力分布云图和接触状态云图,在此基础上进行结构优化,使之受力分散、接触均匀.     

3-D distribution of tensile stress in rock specimens for the Brazilian test

It is claimed that the formula used for calculating the tensile strength of a disk-shaped rock specimen in the Brazilian test is not accurate, because the formula is based on the 2-dimensional elastic theory and only suitable for very long or very short cylinders. The Matlab software was used to obtain the 2-dimensional distribution of stress in the rock specimen for Brazilian test. Then the 2-dimensional stress distribution in Brazilian disk was analyzed by the Marc FEM software. It can be found that the results obtained by the two software packages can verify each other. Finally, the 3-dimensional elastic stress in the specimen was calculated. The results demonstrate that the distribution of stress on the cross section of the specimen is similar to that in 2-dimension. However, the value of the stress on the cross section varies along the thickness of the specimen and the stress is bigger when getting closer to the end of the specimen. For the specimen with a height-to-diameter ratio of 1 and a Poisson＇s ratio of 0.25, the tensile strength calculated with the classical 2-D formula is 23.3% smaller than the real strength. Therefore, the classical 2-D formula is too conservative.     

基于Marc的风力发电机主轴动力学特性研究

本文根据振动理论建立了某型风力发电机主轴的振动方程。针对轴承弹性支撑对主轴固有频率影响的问题,建立了两种有限元模型,运用Marc有限元软件进行模态分析,并对计算结果做了对比。通过对比得出,考虑轴承弹性支撑方案计算出来的各阶固有频率值均有降低,说明轴承的弹性支撑对主轴固有频率有着较大的影响。这为以后进行进一步动力学研究提供了依据。     

基于MSC.Marc的物理力学参数反演

在比较反演分析方法的基础上，应用基于遗传算法的优化反演方法来反演物理力学参数。结合计算力学和有限元软件系统的发展，提出了基于有限元软件MSC．Marc的物理力学参数反演方法。结合某重力坝23^3溢流坝段的安全监测资料，利用该方法反演得到了该大坝坝体弹性模量和坝基变形模量。算例表明，采用遗传算法和MSC．Marc反演物理力学参数是可行的。     

基于MSC.Marc的可变容差法的位移反演

对基于MSC.Marc的可变容差法位移反演进行了探讨,通过对MSC.Marc进行二次开发,编制了基于MSC.Marc的可变容差法弹塑性参数反演程序,并通过两个算例说明可变容差法的局部搜索能力强,反演精度高;另外,在MSC.Marc软件高效的内核求解器的辅助下,加快了反演分析的进行。