通过表面振动测量确定柴油机的噪声源分布 |
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引用本文: | 宋宝安,郝志勇. 通过表面振动测量确定柴油机的噪声源分布[J]. 拖拉机与农用运输车, 2004, 0(6): 18-20,24 |
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作者姓名: | 宋宝安 郝志勇 |
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作者单位: | 1. 300072,天津大学 2. 310027,浙江大学 |
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摘 要: | 通过台架试验测量了不同工况下柴油机各主要部件的表面振动信号,计算得到了它们各自的辐射噪声频谱,以及在整机噪声中所占的比例,从而得到各噪声源的排序。分析了噪声频谱特性及产生噪声的相关原因。经与九点声压法测量得到的整机噪声结果时比,表明表面振动法识别柴油机噪声源是准确可靠的。
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关 键 词: | 柴油机 振动速度 声功率 辐射噪声 |
Noise source identification of diesel engine by structure vibrating measuremen |
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Abstract: | The vibration of major parts of a diesel engine were measured by a series bench test, consequently, their radiating noise level in frequency domain as well as their contributions to the integrated engine's noise were both calculated.The calculated engine's sound power level shows a good fitness to the result obtained by measuring the nine point sound pressure in a semi-anechoic room. Analyzing the sound characteristics of each part in frequency domain,it will be a guidance to the resolution in attenuating the engine's noise level. |
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