基于Poly IIR方法的刹车盘对称循环结构模态分析与研究  

Modal analysis and research of symmetrical cyclic structure of brake disc based on Poly IIR method

作　　者：陈海霞 杨喜旺[1] 黄晋英[2] 侯尧花 石晶 CHEN Haixia;YANG Xiwang;HUANG Jinying;HOU Yaohua;SHI Jing(School of Computer and Control Engineering,North University of China,Taiyuan 030051,China;School of Mechanical and Power Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学计算机与控制工程学院,太原030051 [2]中北大学机械与动力程工学院,太原030051

出　　处：《中国科技论文》2018年第8期875-880,共6页China Sciencepaper

基　　金：国家自然科学基金资助项目(50975265)

摘　　要：先利用有限元振动理论建立刹车盘的有限元模型,设立特定的边界约束条件,得到了刹车盘的前12阶模态参数和振型;然后利用声振互易法进行刹车盘的非接触动力测试,得到了力-声压响应的振动频响函数,避免了传统锤击法利用接触式振动传感器本身的质量对重根的破坏;最后通过Poly IIR算法对刹车盘对称结构模态参数进行准确识别。对比试验值与仿真值,结果表明,二者误差保持在8%以内,可为后续的汽车噪声、振动和声振粗糙度(noise、vibration、harshness,NVH)研究提供一定的参考。By using finite element vibration theory,a finite element model of brake disc is first established,and by setting specific boundary conditions,the first 12 order modal parameters and vibration type of brake disc are get.Then,by using acoustic reciprocity method,the non-contact dynamic test of brake disc and the force-found pressure response of the vibration frequency response function is obtained,which avoids the damage of traditional hammering method using the quality of the contact vibration sensor itself to the overlapping roots.Finally,modal parameters identification of brake disc symmetry structure is conducted by Poly IIR method.Comparing with the simulation results,the error between them remained within 8%,which can provide some reference for the NVH（noise,vibration,harshness）research after.

关 键 词：刹车盘 有限元 声振互易法 算法 模态识别 

分 类 号：TB123[理学—工程力学]