农用三轮车车架结构静动态特性仿真分析

对处于产品设计阶段的某新型太阳能农用电动三轮车车架结构进行静动态特性仿真分析.首先在Pro/e软件中建立车架CAD模型,然后在MSC.Patran/Nastran有限元分析软件中建立以板单元为基本单元的车架有限元模型,对车架进行静态应力分析、自由模态有限元分析和随机振动分析,求出三轮车车架结构的动应力和变形作用下的危险结点和截面.分析结果表明,车架静应力有较大富余,动应力超过了许可应力,在制动状态容易造成车架破坏.车架固有频率和固有振型分布较有利.提出并验证了车架结构的改进方案.车架改进后,在实车静载工况和实车制动工况下最大应力均小于车架改进前该工况的最大应力.车架第1阶固有频率变大,发生共振的可能性更小.振型突变基本消除,车架静、动态性能得到改善.分析结果为产品改型设计提供了理论依据.

Static and dynamic emulation analysis on frame structure of farm tricycle

Static and dynamic emulation analysis on a new type of frame construction of solar battery farm tricycle was performed.CAD model was built with the Pro/e software.Frame finite element model(FEM)was established with shells as a basic unit,and the analysis of static,dynamic and random vibrations were carried out by the MSC.Patran/Nastran software.The static and dynamic characteristics of the frame were obtained.The results indicated that static stress was abundant,and the dynamic stress exceeds permissive stress.The inherent frequency and inherent vibrant former of the frame was good.It brought forward the improving configuration and validated it.The maximal static and dynamic stress in hold still status and brake status was less than the one that had not been improved.The first rank inherent frequency of the frame was bigger but the probability of resonance was lower.The saltation of vibrant former was eliminated.The Static and dynamic capability was improved.The analysis results provided the theory basement for the frame improvement.