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Interior Noise Prediction of the Automobile Based on Hybrid FE-SEA Method

机译：基于混合FE-SEA方法的汽车内部噪声预测

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摘要

In order to predict the interior noise of the automobile in the low and middle frequency band in the design and development stage, the hybrid FE-SEA model of an automobile was created using hybrid FE-SEA method. The modal density was calculated using analytical method and finite element method; the damping loss factors of the structural and acoustic cavity subsystems were also calculated with analytical method; the coupling loss factors between structure and structure, structure and acoustic cavity were both calculated. Four different kinds of excitations including road excitations, engine mount excitations, sound radiation excitations of the engine, and wind excitations are exerted on the body of automobile when the automobile is running on the road. All the excitations were calculated using virtual prototype technology, computational fluid dynamics (CFD), and experiments realized in the design and development stage. The interior noise of the automobile was predicted and verified at speed of 120km/h. The predicted and tested overall SPLs of the interior noise were 73.79 and 74.44 dB(A) respectively. The comparison results also show that the prediction precision is satisfied, and the effectiveness and reliability of the hybrid FE-SEA model of the automobile is verified.
机译：为了在设计和开发阶段预测汽车中低频段的内部噪声，采用混合FE-SEA方法建立了汽车的FE-SEA混合模型。模态密度采用解析法和有限元法计算。用解析法计算了结构和声腔子系统的阻尼损耗因子。计算了结构与结构，结构与声腔之间的耦合损耗因子。当汽车在道路上行驶时，四种不同类型的激励包括道路激励，发动机支架激励，发动机的声辐射激励和风激励。所有的激励都是使用虚拟原型技术，计算流体力学（CFD）进行的，并在设计和开发阶段进行了实验。在120km / h的速度下预测并验证了汽车的内部噪音。预测和测试的内部噪声总体SPL分别为73.79和74.44 dB（A）。比较结果还表明，该算法满足了预测精度，验证了汽车混合FE-SEA模型的有效性和可靠性。

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  • 来源
    《Mathematical Problems in Engineering》 |2011年第2期|p.1-20|共20页
  • 作者

    S. M. Chen; D. F. Wang; J. M. Zan;

  • 作者单位

    State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China,College of Automobile Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130022, China;

    State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China,College of Automobile Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130022, China;

    State Key Laboratory of Vehicle NVH and Safety Technology, Chongqing 401120, China;

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