›› 2017, Vol. 37 ›› Issue (5): 119-123.DOI: 10.3969/j.issn.1006-1355.2017.05.025

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Research and Application of SEA Analysis Method for Vehicle Interior Noise Simulation

  

  • Received:2017-03-03 Revised:2017-05-06 Online:2017-10-18 Published:2017-10-19

整车车内噪声仿真的SEA分析方法研究及应用

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  1. ( 1. 武汉理工大学  现代汽车零部件技术湖北省重点实验室，  武汉  430070；
    2. 汽车零部件技术湖北省协同创新中心，  武汉  430070 )
  • 通讯作者: 郭金

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摘要：

关于整车车内噪声的仿真分析方法，在理论上，FEM/BEM方法可以进行全频段的仿真，但由于高频噪声的波长短，且在仿真初期结构材料的参数不确定，FEM/BEM参数识别和计算难度大，在这种情况下，基于能量平均思想的统计能量方法显现出其特定的求解优势。针对SEA分析方法理论就该方法在车内噪声应用领域展开探讨，从整车车内噪声激励源及噪声传递途径、整车NVH性能开发方法和整车SEA建模方法三个角度对车内高频噪声仿真进行阐述。SEA仿真在整车方面的应用现阶段主要用来指导声学包开发，对SEA仿真中的关键科学问题与工程实际的结合，介绍2个典型工程案例：其一基于双墙理论的车门隔声量优化，通过建立相对独立的双墙模型，提高建模过程中的仿真精度；其二通过控制声学包装优化变速箱高频啸叫，采用车内双层地毯的优化方法，降低驾驶员头部的声压1.31 dB。通过SEA方法对车内高频噪声进行仿真显著改善车辆的NVH性能，提高车辆乘坐舒适性，可为相关领域的研究提供参考及借鉴。

关键词: 声学, 整车噪声, 高频噪声, 子系统, 统计能量法, 噪声控制

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