摘要
精确的高质量有限元模型是进行结构动力学仿真的关键。基于Pro/E软件建立摆线齿轮参数化模型,通过初始有限元模态仿真和试验模态的结果对比,分析差异性原因,利用Hyperworks软件的参数优化功能,建立一个以固有频率的相对误差为修正目标,以结构的弹性模量、密度和泊松比等材料属性为修正参数的动力学优化问题。修正结果表明,摆线齿轮前六阶固有频率的最大相对误差由4.11%降为2.28%,有限元模型精度得到大幅提高,更加真实地反映结构特征,为进一步结构动态响应预测以及动态设计提供准确的模型基础。
The precise and high-quality finite element model is the key solution in structure dynamic analysis. The parametric model of cycloid gear was created using Pro/E. By comparing the results of initial finite element analysis and experimental modal, the dynamic modification problem was established to solve the relative errors of natural frequency, therefore the Young＇s modulus, Poisson＇s ratio and density of cycloid gear were updated based on the optimization module of Hyperwork. The results show that the maximum relative error of first six natural frequencies was reduced from 4.11% to 2.28% offer modifying and the accuracy of the finite element modal of cycloid gear was significantly improved to provide important support for the furthermore analysis of structure response prediction and dynamic design.
出处
《机械设计与制造》
北大核心
2017年第9期117-120,共4页
Machinery Design & Manufacture
基金
国家自然科学基金项目(51605406)
厦门市科技计划项目(3502Z20123038)
关键词
摆线齿轮
模态分析
模型修正
优化设计
Cycloid Gear
Modal Analysis
Model Updating
Optimization Design
