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第 35卷第 3期小型内燃机与摩托车 Vol. 35 No. 3
2006年 6月 SMALL BUSTION ENGINE AND MOTORCYCLE June. 2006
摩托车车架模态特性分析
徐中明 1 张志飞 1 汪先国 2 周坤 2 罗春其 2
(1 - 重庆大学机械工程学院重庆 400030
2 - 建设工业(集团)有限责任公司技术中心)
摘要:本文采用仿真和试验相结合的方法分析研究摩托车车架的模态特性,首先采用 UG软件对某低
3 跨式摩托车车架进行 CAD建模,然后导入 MSC. PATRAN /NASTRAN建立其有限元模型,进行自由模态
的计算机仿真分析;采用力锤激励,利用最小二乘复指数法和最小二乘复频域法来识别车架的试验模
态。仿真结果可用来指导试验,试验可以验证仿真结果,二者相结合可以更好地分析该车架的振动特性。
关键词:摩托车车架振动模态分析有限元分析
中图分类号: U483 文献标识码: A 文章编号: 1671 - 0630 (2006) 03 - 0029 - 03
Ana lysis of M oda l Characteristic of M otorcycle Frame
Xu Zhongm ing1 , Zhang Zh ife i1 , W ang X ianguo2 , Zhou Kun2 , L uo Chunq i2
1 - Chongqing University (Chongqing 400030) 2 - J ianshe Industries Co. , L td.
Abstract: In this paper, the modal characteristic of the motorcycle frame is analyzed by puter simula
tion and the experimental method. First, the CAD model of a certain motorcycle frame if modeled with Uni
graphics. Based on the CAD model, finite element model of the frame and the free modal analysis are done
with MSC. PATRAN /NASTRAN. Experimental modal analysis is done with LMS analysis system. The excita
tion force is an impulse from a hammer. The least p les Exponential (LSCE) estimation method is
used to estimate the frequency, damp ing and participation factors. The Least Squares Frequency Domain (LS
FD) method is used to estimate mode shapes. putati