制动盘重根模态识别

孟丽雪，徐传燕^*，李珊，宫勋

山东交通学院 汽车工程学院，山东 济南  250357

摘要：为有效识别盘式制动器制动盘的重根模态，基于ANSYS有限元分析软件建立制动盘仿真模型，通过模态分析获取制动盘固有频率及模态振型，采用节圆-节径描述制动盘的9阶模态振型，识别重根模态。通过锤击测试法对制动盘进行试验模态分析，与有限元分析结果对比，各阶模态固有频率的最大误差未超过5%，验证了制动盘存在重根模态与有限元计算结果的可靠性，并分析两种结果存在误差的原因。重根模态的识别可为分析制动盘振动固有特性、降低制动器振动噪声及优化设计等提供依据。

关键词：制动盘；重根模态；有限元分析；试验模态

Doublet mode identification of brake disc

MENG Lixue，XU Chuanyan^*，LI Shan，GONG Xun

School of Automotive Engineering, Shandong Jiaotong University, Jinan 250357, China

Abstract:In order to effectively identify doublet mode of the brake disc for disk brake, the brake disc simulation model is established by ANSYS software. The inherent frequency and vibration shape of the brake disc is obtained through mode analysis, and the 9-order mode vibration shape of the brake disc is described using pitch circle and pitch diameter so as to identify doublet mode. The mode test results of the brake disc are obtained by hammering test method. The result show that compared with the finite element analysis, the maximum error of natural frequency for each mode is less than 5%, which verify the reliability of the finite element calculation result and the existence of doublet mode of the brake disc. The reason of error between the simulation results is analyzed. The identification of doublet mode can provide the basis for the analysis of the inherent vibration characteristics of the brake disc, reducing vibration noise of brake and optimization of brake design.

Keywords:brake disc; doublet mode; finite element analysis; test mode