汽车工程

汽车工程 ›› 2019, Vol. 41 ›› Issue (1): 69-74.doi: 10.19562/j.chinasae.qcgc.2019.01.011

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封闭腔内声场的核心变量及其应用研究*

高书娜   

  1. 1.西南大学工程技术学院,重庆 400716;
    2.汽车噪声振动和安全技术国家重点实验室,重庆 401122
  • 收稿日期:2017-12-18 出版日期:2019-01-25 发布日期:2019-01-25
  • 通讯作者: 高书娜,副教授,博士,E-mail:shngao@swu.edu.cn。
  • 基金资助:
    *国家自然科学基金(51505389)和汽车噪声振动和安全技术国家重点实验室2014年度开放基金(NVHSKL-201401)资助。

A Study on Core Variables of Enclosed CavitysInterior Sound Field and Its Application

Gao Shuna   

  1. 1.College of Engineering and Technology, Southwest University, Chongqing 400716;
    2.State Key Laboratory of Vehicle NVH and Safety Technology, Chongqing 401122
  • Received:2017-12-18 Online:2019-01-25 Published:2019-01-25

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摘要： 以降低车内噪声为目标,快速锁定车身结构关键区域并提出改进措施,前提是清楚掌握车内声场的核心变量。因此,基于声场计算公式,讨论公式中的变量与各参数及声压响应的关系,发现节线分布是核心变量,且增加节线数可降低腔内声压;制作样车,通过物理试验验证了这一结论;并将结论用于某型车的车内声压控制中,成功降低了该车内部声压,表明基于节线分布可以快速地对腔内声压进行控制。

关键词: 结构声场耦合系统, 固有频率变量, 振型变量, 节线分布

Abstract: Aiming at reducing the interior noise, to quickly lock the key areas of vehicle body structure and put forward improvement, the premise is to get a clear understanding of core variables of car interior sound field. Therefore, in this paper, based on the calculation formula of interior sound field, relationship between variables and parameters and sound pressure response is analyzed. It is found that nodal line distribution is the core variable and increase of nodal line number can decrease the interior sound pressure. A prototype car is made and the conclusion is verified by the physical test. The conclusion is applied to the interior sound pressure control of a certain type of vehicle, which successfully reduces the interior sound pressure of the vehicle. It shows that the interior sound pressure can be controlled quickly based on the nodal line distribution.

Key words: structural acoustic field coupling system, frequency variable, mode variable, nodal line distribution