汽车碰撞砼护栏过程的简化分析

将汽车与砼护栏间化为刚体。首先从阿沛尔方程出发，以刚体重心速度和刚体角速度作为准速度推导刚体碰撞方程。     

基于计算机视觉的交通事故现场测量系统

本文描述了基于计算机视觉进行道路交通事故现场测量系统的构成及系统基本工作过程。     

活塞环径向压力分布的精确测量方法

为深入研究活塞环径向压力分布的规律，本文分析了活塞环径向压力分布传统测量法的缺点，研究了活塞环变形与径向压力的关系，提出了一种电测量方法，能够精确测量活塞环径向压力分布。实际测量结果表明，采用新方法测量活塞环径向压力分面，结果稳定可靠，重现率高，并且有较高的精度。     

人体胸部侧向碰撞模型参数值确定方法

本文以人尸体胸部无反弹冲撞式滑车侧向碰撞试验为基础，建立与试验相适应的人体胸部侧向碰撞模型。通过导出试验与模型之间误差的函数关系和应用最小误差理论。探讨了如何根据测试胸部生物力学特性的试验数据确定定最佳参数的方法问题。     

轮胎非稳态转向特性非线性仿真模型

本文以轮与路面之间的滑移速度为出发点，在稳态指数统一模型的基础上，建立了轮胎非稳态转向特性非线性仿真模型。在实验研究中，发现了动态过程回正力臂和附加的回正力矩的滞后特性。仿真和试验结果对比表明，该模型足以反映轮胎非线性转向特性，可用于前轮及汽车操纵动力学仿真方面的研究。     

Ride Quality and Dynamics of Rail Vehicle Models for Microcomputers

This paper describes mathematical and computer models for ride quality and dynamics of rail vehicles developed for running on personal computers. The purpose of the computer simulations is for prediction of ride quality in order to study the dynamic stability of the system and the effect of track quality and irregularities on ride quality.

In deriving the equations of motion for dynamic stability, the tangential forces acting on the contact areas between the wheels and rails are of fundamental importance in railway vehicles dynamics and are included in the analysis [1]. These forces are due to the creep phenomenon between the wheel and the rail on which it is rolling. Track irregularities are defined in terms of four components consisting of gauge, cross level, alignment and vertical surface profile [2]. Relation of allowable track irregularities versus speed is given by the FRA Track Safety Standards. Analytical representation of track irregularities should include both PSD (Power Spectral Density) for CWR (Continuous Welded Rail) as well as discrete inputs from track joints.

In this paper, the rail vehicle suspension analysis and dynamics mathematical and computer models are described. The computer models are written in Fortran 77 and designed to run on personal computer. The paper also discusses programming considerations that must be taken into account when programming for microcomputers under DOS (IBM's Disk Operating System) and MS or RM Fortran Compilers. Most of the considerations are however, valid in general with respect to engineering software development and programming for microcomputers.

Computer graphics is a powerful tool for visualization of the resulting solutions such as the display of the characteristic roots for the eigenvalues solution on a root locus plot and representation of acceleration levels versus the “Reduced Comfort Boundary” limits defined by the International Standards Organization” (ISO 2631-1985). In this paper some examples of these resulting outputs are presented and their significance discussed.     

地铁车辆基地盖下空间人性化设计评价研究

地铁车辆基地进行上盖物业开发后,能够有效提高土地利用率,创造较为可观的经济效益,但如果处理不当,会大幅降低盖下工作环境的品质。针对这一问题,以优化盖下空间人性化设计为目的,运用扎根理论和IPA分析法进行评价。首先,采用扎根理论分析得到盖下空间人性化设计的评价指标,将其划分为两个主范畴,据此构建盖下空间人性化设计评价指标体系;然后,采用IPA分析法对通过扎根理论分析所得的各项评价指标的重要性和满意度进行评价;最后,基于以上分析,提出优化策略,以期为盖下工人提供更为人性化的工作环境,为轨道交通长期安全运营提供保障。     

损伤失效分析的数值原理及有限元列式

结构构件在外荷载的作用下,其材料逐渐衰变,表现出损伤演化进而最后失效的行 为,描述这一行为的损伤本构关系非常复杂并且有高度的非线性;本文基于连续损伤 力学(。ntinuuln压甘以seMechan油),提出用于结构损伤失效分析的数值原理,包括损 伤模型、失效准则、结构分析变分原理及相应的有限元列式;涉及到具有损伤翔合的 弹塑性问题及蠕变问题.      

损伤局部性方法研究进展

本文综述了应用力学研究所的教师、博士后人员和研究生们将损伤局部性方法 (LDA)用于娇变损伤和低周疲劳损伤分析以及细观损伤测量中的研究成果。展望了 损伤局部性方法进一步发展的前景。      

Winkler弹性地基上预应力锚索地梁内力的计算方法

介绍用Winkler弹性地基梁计算预应力锚索地梁的内力 ,并给出主要计算流程。结合京珠高速公路某工点工程实例 ,将Winkler弹性地基梁和连续梁方法的计算结果与工程实测进行比较 ,指出在预应力锚索地梁正常工作状态下 ,采用Winkler弹性地基梁方法所得结果与真实情况更为吻合