| 基于空腔流动特性的汽车侧窗风振噪声控制方法研究 |
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| 引用本文： | 王宁,谷正气,张勇,刘龙贵.基于空腔流动特性的汽车侧窗风振噪声控制方法研究[J].振动工程学报,2014,27(3). |
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| 作者姓名： | 王宁 谷正气 张勇 刘龙贵 |
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| 作者单位： | 湖南工业大学机械工程学院;湖南铁道职业技术学院铁道牵引与动力学院;武汉理工大学汽车工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(51305312);湖南省科技厅计划项目(2009JT014);湖南省科技厅科研条件创新专项基金资助项目(2011TT2043) |
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| 摘 要： | 利用简单空腔模型对串联空腔控制风振噪声方法进行了机理分析,得出抑制空腔噪声主要通过气流导出效应和能量耗散效应的结合。基于此机理,提出了一种汽车侧窗风振噪声的控制方法,即在B柱上开凹槽,使凹槽和后窗开启时的车内空间形成一个串联空腔。采用大涡模拟(LES)的计算方法对其进行数值模拟,结果表明开凹槽后可以有效的抑制风振的产生。并对凹槽的尺寸进行了优化研究,计算结果表明L/D=4凹槽的降噪效果最明显,最大降幅达到14dB。
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| 关 键 词： | 噪声控制 汽车 空腔流动 风振噪声 大涡模拟 |
| 收稿时间： | 2012/12/11 0:00:00 |
| 修稿时间： | 2014/6/16 0:00:00 |
Study on control method for automobile side-windows buffeting noise based on cavity flow characteristicsWang Ning 1 ,GU Zhengqi1,2 ,Zhang Yong1,LiuLonggui1 |
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| wangning,and.Study on control method for automobile side-windows buffeting noise based on cavity flow characteristicsWang Ning 1 ,GU Zhengqi1,2 ,Zhang Yong1,LiuLonggui1[J].Journal of Vibration Engineering,2014,27(3). |
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| Authors: | wangning and |
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| Abstract: | This article do some mechanism analysis on the way how the series cavity controls the aerodynamic noise by using the simple cavity model which comes to a conclusion that the front cavity can control the aerodynamic noise of back for the comprehensive effects of airflow derived and energy dissipation. Based on the mechanism, a control method of side-window wind buffeting noise was proposed, namely opening a groove on the B pillar to form a series cavity between the groove and interior space. Using large eddy simulation calculation method to firm the efficiency of the control method in restraining the generation of wind vibration, and then optimized the size, the result revealed when L/D=4, the noise can be reduced in maximum to 14dB. |
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| Keywords: | car cavity flow buffeting noise large eddy simulation side windows |
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