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某型内燃机车驾驶室噪声分析

Cab Noise Analysis of a Certain Type of Diesel Locomotive

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【作者】 张超张劲松万雳徐巍周明刚

【Author】 ZHANG Chao;ZHANG Jin-song;WAN Li;XU Wei;ZHOU Ming-gang;Agricultural Machinery Engineering Research and Design Institute, Hubei University of Technology;Hubei Srida Heavy Construction Machinery Co., Ltd.;

【机构】 湖北工业大学农机工程研究设计院湖北时瑞达重型工程机械有限公司

【摘要】 为研究某型内燃机车驾驶室噪声产生的原因,基于实车构建内燃机车驾驶室声学数值模型对驾驶室进行噪声特性分析。将试验测量的激励信号加载到发动机4个悬置点上计算声学响应,结合板块贡献量分析、振动试验、声学模态分析、耦合模态分析明确驾驶室噪声形成机理,在此基础上提出措施改善驾驶室内噪声环境。研究结果表明,驾驶室内噪声和壁板振动加速度在74、110 Hz附近处存在明显峰值,并且与发动机基础转频密切相关;在39、74、110 Hz附近处驾驶室左、右、前壁板与室内声腔存在耦合共振响应,最终形成驾驶室特殊噪声分布。相关研究结果可以为降低驾驶室异常噪声提供参考。

【Abstract】 In order to study the causes of cab noise of a type of internal diesel locomotive, a numerical model of internal diesel locomotive cab acoustics was constructed to analyze the cab noise characteristics based on real diesel locomotive. The excitation signals measured by the test were loaded onto the four suspension points of the engine to calculate the acoustic response. Combined with the panel contribution analysis, vibration test, acoustic modal analysis and coupling modal analysis to clarify the cab noise formation mechanism, based on which measures were proposed to improve the noise environment in the cab. The research results show that the noise and panel vibration acceleration in the cab have obvious peaks near 74 Hz and 110 Hz, and are closely related to the engine base rotation frequency. Coupled resonance responses exist between the left, right and front panels of the cab and the interior acoustic cavity near 39 Hz, 74 Hz and 110 Hz, which eventually form the cab special noise distribution. The relevant research results can provide reference for reducing cab abnormal noise.

【基金】 湖北省技术创新专项(2017ABA164)
  • 【文献出处】 科学技术与工程 ,Science Technology and Engineering , 编辑部邮箱 ,2021年30期
  • 【分类号】U262
  • 【被引频次】2
  • 【下载频次】107
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