汽车制动盘高精度有限元建模及试验研究  

High precision finite element modeling and test research of automotive brake disc

作　　者：方彦奎 钟玉华 吴彦鑫 Fang Yankui;Zhong Yuhua;Wu Yanxin(College of Automotive and Traffic Engineering,Guangzhou College of South China University of Technology,Guangzhou 510800,China)

机构地区：[1]华南理工大学广州学院汽车与交通工程学院,广州510800

出　　处：《电子测量技术》2021年第3期71-76,共6页Electronic Measurement Technology

基　　金：广东省特色创新项目(自然科学类)(2020KTSCX204)资助。

摘　　要：为提高汽车制动盘的建模精度,分别采用3类单元建立制动盘有限元模型。通过计算与试验获得制动盘前六阶固有频率,对比发现采用四面体、1阶和2阶六面体单元建立的有限元模型与测试所得的前六阶固有频率误差分别小于9%、2%和7%。进而比对1阶六面体有限元模型计算与测试振型,并对其进行约束模态分析。结果表明,计算与测试所得制动盘前六阶振型基本一致,有限元模型建立准确可靠;3种不同的单元建模精度从高至低分别为1阶六面体,2阶六面体,四面体;制动盘约束边界条件存在三对复模态,制动系统设计时应予以关注。研究方法对提高制动盘有限元建模精度具有一定的参考意义。In order to improve the modeling accuracy of automobile brake disc,three kinds of elements were used to establish the finite element model of brake disc.The first six order natural frequencies of the brake disc were obtained by calculation and test.It is found that the errors of the first six order natural frequencies between the finite element model established by using tetrahedral,1-order and 2-order hexahedron elements are less than 9%,2%and 7%respectively.Then,the mode shapes of the first order hexahedron finite element model were compared,and the constrained modal analysis was carried out.The results show that the first six modes shapes of brake disc obtained by calculation and test are basically consistent,and the finite element model is accurate and reliable,the modeling accuracy of three different elements from high to low are 1-order hexahedron,2-order hexahedron and tetrahedron respectively,three pairs of complex modes exist in the brake disc restraint boundary condition and attention should be paid to the design of brake system.The research method has certain reference significance to improve the accuracy of brake disc finite element.

关 键 词：制动盘 有限元建模 模态试验 约束模态分析 

分 类 号：U463.5[机械工程—车辆工程]