文档介绍：2009 年 LMS 中国用户大会
某运动机构中曲杆的疲劳寿命分析
冯琳娜喻天翔崔卫民(西北工业大学航空学院, 西安 710072)
The fatigue life analysis of blending bar of mechanism
Feng Lin-na,YU Tian-xiang ,Cui Wei-min
(College of Aeronautics, Northwestern Polytechanical University, Xi’an, 710072, China)
[摘要]机构中构件发生疲劳破坏,会导致机构的运动失效,可能造成重大的安全事故和经济损失,因此如
何实现机构的耐久性设计具有重要意义。本文在LMS的Motion平台建立机构多体运动学动力学仿真模型,
设定机构的运动方式并将曲杆柔性化,
程传递到Durability平台下对曲杆进行了疲劳寿命分析。证明曲杆的疲劳寿命符合机构的使用要求,为下
一步对机构进行结构优化提供了有效依据。
关键词 LMS; 柔性化; 疲劳寿命
[Abstract]The fatigue failure of ponent can lead to the movement failure of mechanism and
may cause fateful incident and economic losses, so how to perform the durability design for
mechanism is significant. A multi-body dynamic simulation model of the mechanism is established
on ; the load history of blending bar is obtained by setting the movement track
of mechanism and making blending bar flexible. Then the load history is transferred to Durability
workbench by modal participation factor and the fatigue analysis of blending bar is performed.
The results indicate that the fatigue life of blending bar accord the requirements and provide
the effective data to the structural optimization of mechanism.
Key words: LMS; Flexible; Fatigue Life
1 引言
随着现代工程技术的飞速发展,机械系统变得越来越庞大,越来越复杂, 而机械系统中机构的运转速
度越来越快。高速柔性机构的动力分析指出,机构在作高速运转时,构件具有可挠性,构件内将会产生周
期性变化的动应