Page 102 - 《应用声学》2020年第3期

第 39 卷 第 3 期 Vol. 39, No. 3
2020 年 5 月 Journal of Applied Acoustics May, 2020

⋄ 研究报告 ⋄

基于流固耦合的油底壳振动噪声预测分析

宋兆哲 † 李荣荣 高锋军 杨景玲

(长城汽车股份有限公司 河北省汽车工程技术研究中心 保定 071000)

摘要：为了对油底壳的改进方案进行噪声预测，首先建立油底壳的流固耦合有限元模型，进行耦合模态计算，
获得其固有频率和振型，通过模态试验验证了耦合有限元模型的准确性；其次，在发动机工作过程中，通过试
验测得油底壳各螺栓固定处的振动加速度；再次，基于模态结果，在油底壳各螺栓固定处施加测试的振动加速
度，采用有限元的分析方法对油底壳进行了强迫振动计算和辐射噪声计算，并进行了试验对比，结果表明该方
法可用于发动机开发试验确认阶段，对油底壳改进方案进行振动噪声的预测，减小开发风险；最后，对含油量
多少对辐射噪声的影响进行了对比分析。
关键词：油底壳；模态；流固耦合；振动噪声
中图法分类号: TK411+.6 文献标识码: A 文章编号: 1000-310X(2020)03-0422-08
DOI: 10.11684/j.issn.1000-310X.2020.03.015

Prediction analysis of vibration and noise of oil pan based on
fluid-structure coupled

SONG Zhaozhe LI Rongrong GAO Fengjun YANG Jingling

(Great Wall Motor Company Limited, Hebei Automobile Engineering Technology & Research Center, Baoding 071000, China)

Abstract: In order to predict the noise of the improvement program of oil pan, firstly, the fluid-structure
coupled finite element model of oil pan was established, and its natural frequency and mode shape are calculated.
The accuracy of the coupled finite element model was verified by modal test. Secondly, the vibration acceleration
of each bolt in the oil pan was measured by test during the working process of the engine. Thirdly, based on
the modal results, the measured vibration acceleration was applied to the bolt fixtures of the oil pan, the
computations of forced vibration and radiated noise of the oil pan were carried out by using the finite element
analysis method, and the experimental comparison show that the method can be used to predict the vibration
and noise of the oil pan during the confirmation stage of the engine development test, and reduce the risk of
development. Finally, the influence of oil content on radiated noise was analyzed.
Keywords: Oil pan; Modal; Fluid-structure coupled; Vibration and noise

2019-08-07 收稿; 2019-11-28 定稿
作者简介: 宋兆哲 (1982– ), 男, 山东沂南人, 硕士, 工程师, 研究方向: 发动机振动与噪声控制。
† 通信作者 E-mail: songzhaozhe2006@163.com