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路面不平度影响下的悬架动载计算
引用本文:王铁,巴德纯,王庆,茹红强.路面不平度影响下的悬架动载计算[J].东北大学学报(自然科学版),2007,28(1):95-98.
作者姓名:王铁  巴德纯  王庆  茹红强
作者单位:1. 东北大学,机械工程与自动化学院,辽宁,沈阳,110004
2. 东北大学,材料与冶金学院,辽宁,沈阳,110004
摘    要:建立了包含阻尼的悬架系统振动微分方程,运用现代控制工程理论进行拉普拉斯变换,以解线性方程组与待定系数的方法求解传递函数解析解,通过拉普拉斯反变换求出振幅解析解.在对拉普拉斯变换及解析解进行细致的分析后发现,可以有选择地进行变换,以求出易于表达与分析的解析解.同时将路面谱看作多个正弦函数的叠加,在车辆稳态运动的情况下,运用线性系统输出叠加原理,得出了振幅的简捷有效解析解表达式,避免了一系列求解过程;用数值方法求出了主动悬架的动载荷;本方法用VB编程.本软件为悬架的动态可靠性设计与分析提供了载荷方面的准备.

关 键 词:车辆工程  动载荷  数学模型  悬架  振动方程  微分方程  
文章编号:1005-3026(2007)01-0095-04
收稿时间:2005-11-02
修稿时间:2005-11-02

Calculation of Moving Load on Vehicle Suspension When Traveling on Irregular Road
WANG Tie,BA De-chun,WANG Qing,RU Hong-qiang.Calculation of Moving Load on Vehicle Suspension When Traveling on Irregular Road[J].Journal of Northeastern University(Natural Science),2007,28(1):95-98.
Authors:WANG Tie  BA De-chun  WANG Qing  RU Hong-qiang
Institution:(1) School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China; (2) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
Abstract:A differential equation is derived for the vibration of vehicle's suspension system involving damping.Then,the transfer function is solved analytically through the solution to linear equation set with undetermined coefficients after Laplace transform,and the amplitude is solved by way of inverse Laplace transform.After an in-depth discussion on the Laplace transform and analytic solution as above,it is found that the transform is selective so that another analytic solution is available,which will be easier to express and analyze.Regarding the road pavement spectrum as the superposition of lots of sine functions and assuming that the vehicle is traveling steadily,an effective and simple analytic expression of amplitude is given based on the linear system additivity for outputs,thus avoiding the trouble with a series of solutions.In this way,the moving load on active suspension is given numerically,and the algorithm has been implemented with VB programming.The software developed therefore provides a preparation for the dynamic reliability design/analysis of suspension.
Keywords:vehicle engineering  moving load  mathematics model  suspension  vibration equation  differential equation
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