摘要
为了解A150摩托车的动特性参数,分别建立了该车车架的管壳单元和壳单元两种有限元模型并进行了模态分析,得到了该车架小于400Hz的11阶固有频率。采用自行研发的模态试验测试分析系统,对车架的固有频率进行了实测。结果表明:对于管壳单元和管单元两种车架模型,计算固有频率与实测值的平均误差为分别为1.22%和0.89%,均方差分别为8.70%和3.62%,误差值在可接受范围内,说明所建有限元模型的正确性。对比管壳单元模型和管单元模型,前者精度相对较低,运算量小,适合对车架优化的定性分析;后者精度相对较高,适合对车架优化的定量分析。
In order to know characteristics of the A150 motorcycle＇s dynamic parameters,we establish the motorcycle frame＇s two finite elements which are pipe-and-shell element and pipe element and make a modal analysis,then we get the frame＇s 11-mode natural frequency which is less than 400Hz.Self-designed test modal analysis system is adopted for measuring the natural frequency of the frame.The results show that：for two frames models of pipe-and-shell element and pipe element,the average error of the natural frequency and the measured value is 1.22% and 0.89%,the mean square error is 3.62% and 8.70%,those two values are all in an acceptable range,the results illustrate that the finite element model we built is exact.Compared pipe-and-shell element model with pipe element model,the former has a low precision,a small amount of calculations and is suitable for frame＇s optimizational qualitative analysis;the latter has a high precision and is suitable for frame＇s optimizational quantitative analysis.
出处
《机械设计与制造》
北大核心
2010年第6期190-192,共3页
Machinery Design & Manufacture
基金
广东省科技计划项目
摩托车虚拟样机关键技术研究及攻关(2005B10201013)
关键词
管壳单元
管单元
摩托车
车架
固有频率
Pipe-and-shell element
Pipe element
Motorcycle
Frame
Natural frequency
