作者：任波, 杨啟梁, 胡溧

作者单位：武汉科技大学汽车与交通工程学院, 湖北 武汉 430081

关键词：重型变速器壳体;动态特性;试验模态分析;计算模态分析;模态参数

摘要：

为分析某重型变速器壳体的动态特性，基于LMS Test.Lab软件，使用激振器法进行试验模态分析，基于Hypermesh软件，使用Block Lanczos法进行计算模态分析。分析结果表明，橡胶轮胎支撑可模拟该自由模态试验的边界条件；变速器壳体主副箱连接方式为面面接触及采用高阶四面体单元可以获取更准确的计算模态参数；两种方法获取的壳体非零前六阶固有频率相对误差皆小于5%，振型基本一致，验证该壳体有限元模型的准确性。此研究表明结构模态分析技术对结构动态特性分析的有效性，为分析及改善该变速器总成的动态特性奠定基础，为类似结构的重型变速器壳体模态分析提供参考。

Analysis of dynamic characteristics of a heavy transmission housing
REN Bo, YANG Qiliang, HU Li
College of Automobile and Traffic Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
Abstract: In order to analysis the dynamic characteristics of a heavy transmission housing, respectively based on LMS Test. Lab software, the method of vibration exciter for housing has carried on the experimental modal analysis, based on Hypermesh software, using the Block Lanczos method for calculating modal analysis was carried out on the shell. Analysis results show that the boundary conditions of the free modal test can be simulated by using rubber tire support; using the contact face to simulink the connection between the main and auxiliary housing and higher order element can obtain more accurate calculation modal parameters; the relative errors of the first 6 non-zero order natural frequencies obtained by the two methods are less than 5%, and the vibration modes are basically the same, it proves the correctness of the finite element model. This study shows the effectiveness of structural modal analysis technique to the analysis of dynamic characteristics of the structure, which lays a foundation for analyzing and improving the dynamic characteristics of the transmission assembly, and provides a reference for the modal analysis of heavy transmission housing that similar to this research object.
Keywords: heavy transmission housing;dynamic characteristics;experimental modal analysis;calculating modal analysis;modal parameters
2019, 45(7):51-55  收稿日期: 2018-04-06;收到修改稿日期: 2018-05-10
基金项目:
作者简介: 任波(1993-),男,湖北十堰市人,硕士研究生,专业方向为汽车动力学与汽车NVH (噪声、振动与声振粗糙度)
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