摘要
为准确识别某轿车行驶过程中在2900RPM和3750RPM时车内共鸣声的来源，基于阻抗矩阵法对其进行了传递路径分析，并采用设定奇异阈值限制条件数的方法降低病态误差。分析结果表明：动力总成右悬置 、 方向、后悬置 方向对应传递路径是2900RPM时共鸣声的主要贡献路径，前两者贡献量大的根本原因是其激励力大，后者是其路径灵敏度高；动力总成右悬置 方向、后悬置 方向对应传递路径是3750RPM时共鸣声的主要贡献路径，前者贡献量大的根本原因是其激励力大，后者是其路径灵敏度高。上述分析结果对进一步制定有效的噪声控制措施、改善汽车声品质具有重要指导意义。
Abstract
In order to investigate sources of the interior booming noise in a car cabin when the engine is running at 2900RPM and 3750RPM, the transfer path analysis based on impedance matrix method was conducted and condition number was restricted by a setting threshold to reduce ill-condition error. Results show that on one hand, transfer paths corresponding to the x direction of the powertrain’s right mount, the z direction of the powertrain’s right mount and the z direction of the powertrain’s rear mount are the main contributive paths at 2900RPM, the large exciting force is the root cause for the first two ones, while the high path sensitivity is the root cause for the third one, on the other hand, transfer paths corresponding to the x direction of the powertrain’s right mount and the z direction of the powertrain’s rear mount are the main contributive paths at 3750RPM, the large exciting force is the root cause for the first one, while the high path sensitivity is the root cause for the second one. These results are of great guiding significance on the noise control and the improvement of the car’s sound quality.
关键词
共鸣声 /
动力总成 /
结构传播声 /
阻抗矩阵法 /
传递路径分析
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Key words
booming noise /
powertrain /
structure-borne noise /
impedance matrix method /
transfer path analysis
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杨洋;褚志刚;熊敏.
基于阻抗矩阵法的车内共鸣声的传递路径分析[J]. 振动与冲击, 2014, 33(18): 164-169
YANG Yang;CHU Zhi-gang;XIONG Min.
Transfer Path Analysis of Booming Noise in a Car Cabin based on Impedance Matrix Method[J]. Journal of Vibration and Shock, 2014, 33(18): 164-169
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脚注
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