装载机驾驶室低频声分析与控制

发布时间：2018-12-10 21:22

【摘要】：针对装载机驾驶室中难以处理的低频噪声问题,分别建立结构声和透射声声场仿真模型,并进行驾驶室车内结构声和透射声数值仿真.同时验证驾驶室模型建立的准确性,确定驾驶室车内声场与结构声和透射声的关系,最后进行装载机驾驶室低噪声控制设计.结果表明,通过考虑可行性、经济性和轻量化,优化设计了驾驶室吸声和阻尼处理.以驾驶室人耳声压频响曲线为目标,对重要板件的厚度进行设计,改变了驾驶室结构模态与声场的耦合和隔声特性.从而使得驾驶室内噪声最高声压级降低了3.37 d B,总声压级降低了2.93 d B,取得了良好的低频声控制.
[Abstract]:Aiming at the problem of low frequency noise which is difficult to deal with in the cab of loader, the simulation models of structural sound and transmission sound field are established, and the numerical simulation of structural sound and transmission sound in cab is carried out. At the same time, the accuracy of the cab model is verified, and the relationship between the sound field of the cab and the structural sound and the transmission sound is determined. Finally, the low noise control design of the cab of the loader is carried out. The results show that, by considering feasibility, economy and lightweight, the sound absorption and damping treatment of cab is optimized. Aiming at the frequency response curve of the ear pressure in the cab, the thickness of the important plate is designed, and the coupling and sound insulation characteristics of the structural mode and sound field of the cab are changed. Therefore, the maximum sound pressure level in the cab is reduced by 3.37 dB, and the total sound pressure level is reduced by 2.93 dB, and a good low frequency sound control is achieved.
【作者单位】：东南大学机械工程学院;
【基金】：江苏省前瞻性联合研究资助项目(BY2014127-01) 江苏省科技支撑计划资助项目(BE2014133)
【分类号】：TB535;TH243

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