基于Blocked force方法的结构振动响应预测  

Structural vibration response prediction based on Blocked force method

作　　者：刘念思 翁建生[1] 郑子健 LIU Niansi;WENG Jiansheng;ZHENG Zijian(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210000,China;Noise Lab,Bosch Automotive Products(Suzhou)Co.,Ltd.,Suzhou 215000,China)

机构地区：[1]南京航空航天大学能源与动力学院,南京210000 [2]博世汽车部件有限公司噪音实验室,江苏苏州215000

出　　处：《振动与冲击》2020年第21期126-131,共6页Journal of Vibration and Shock

基　　金：江西省汽车噪声与振动重点实验室2019年度开放基金(JXNVHKB-KFKT-201801)。

摘　　要：振动噪声源特性识别一直是汽车开发中的重要任务,针对传统传递路径分析中获取激励的局限性,提出了基于Blocked force方法的传递路径分析方法,可以直接测得等效力代替激励源分析结构振动。对Blocked force方法进行理论推导,验证了理论的准确性。针对电子制动助力器工作激励引起的结构噪声问题进行应用研究,选取前围板振动加速度作为研究对象。结果表明,该方法预测的前围板振动响应和试验测试值吻合,验证了Blocked force方法的工程可行性,为整车开发中电子制动助力器结构噪声优化提供理论依据。Vibration-noise source characteristics recognition is an important task in development of automobiles. Here, aiming at limitations of acquiring excitation in traditional transfer path analysis(TPA) method, a novel TPA method based on the Blocked force method was proposed to directly measure equivalent force and replace excitation source for structural vibration analysis. The Blocked force method was derived theoretically to verify the correctness of its theory. The method was used to study the structure-borne noise problem caused by working excitation of an electronic brake booster(EBB). Results showed that vibration responses of its front panel predicted with this method agree well with measured values in tests;the engineering feasibility of the proposed method is verified;the study results provide a theoretical basis for the optimization of EBB structure-borne noise in vehicle development.

关 键 词：传递路径分析 结构噪声 Blocked force 响应预测 

分 类 号：U467.3[机械工程—车辆工程]