| 基于声腔模态分析的汽车低频噪声优化 |
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| 引用本文： | 张杰,桑建兵,胡经纬,罗明军.基于声腔模态分析的汽车低频噪声优化[J].安阳工学院学报,2022,21(2):12-17. |
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| 作者姓名： | 张杰 桑建兵 胡经纬 罗明军 |
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| 作者单位： | 合肥职业技术学院 交通工程学院,合肥 238000;河北工业大学 机械工程学院,天津 320000;凯翼汽车有限公司工程研究院,安徽 芜湖 241009 |
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| 基金项目： | 安徽省教育厅自然科学重点项目(KJ2019A1126);安徽省高校优秀青年人才重点项目(gxyqZD2018112);教育部第三批现代学徒制试点单位(教职成厅函[2018]41号)。 |
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| 摘 要： | 根据汽车白车身结构有限元模型建立车身声固耦合模型。基于声学模态分析理论,进而求解声腔模态。通过实车怠速噪声和车身悬置激励力测试车内响应点的声压值,进一步验证声固耦合模型。通过峰值频率下的板块单元贡献量和模态应变能优化分析,汽车车内低频噪声降低,有利于提升汽车的NVH性能。
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| 关 键 词： | 声学模态分析 声固耦合 模态应变能 板块单元贡献 |
Low-frequency Noise Optimization Based on Modal Analysis of Acoustic Cavity |
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| ZHANG Jie,SANG Jianbing,HU Jingwei,LUO Mingjun.Low-frequency Noise Optimization Based on Modal Analysis of Acoustic Cavity[J].Journal of Anyang Institute of Technology,2022,21(2):12-17. |
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| Authors: | ZHANG Jie SANG Jianbing HU Jingwei LUO Mingjun |
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| Institution: | (School of Traffic Engineering,Hefei Technology College,Hefei 238000,China;School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401,China;Automotive Engineering Institute,Cowin Auto Limited Company,Wuhu 241009,China) |
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| Abstract: | A finite element(FE)model of vehicle interior acoustic cavity was established in terms of an FE model of vehicle body in white.Based on acoustic modal analysis theories,thus solving the acoustic mode.The sound and solid coupling model is validated by measuring the sound pressure at the interior of the car by means of the idle speed noise of the car and the suspension force of the car body.Through the optimization analysis of plate unit contribution,and modal strain energy under peak frequency,the low frequency noise in the car is reduced,which is beneficial to improve the NVH performance of the vehicle. |
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| Keywords: | acoustic modal analysis acoustic-structure couple modal strain energy plate element contribution |
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