【作者】 尹宝惠； 季振林；

【Author】 YIN Bao-hui;JI Zhen-lin;College of Power and Energy Engineering,Harbin Engineering University;

【机构】 哈尔滨工程大学动力与能源工程学院；

【摘要】 针对某型挖掘机的配置和工作状态,识别主要振动噪声源,建立整机声学仿真模型,运用统计能量分析(SEA)及半无限流体方法对整机模型在高频噪声进行仿真计算,在原地最大油门憋斗工况下,仿真结果与试验测量的挖掘机辐射噪声声功率级相差小于3dB(A)。识别振动噪声源的主要传递路径,在路径上关键位置应用阻尼材料,降低振动,减少辐射噪声。研究表明:采用SEA和半无限流体方法不仅可以简化建模步骤,而且能够满足挖掘机产品在开发设计阶段对辐射噪声预测的要求。更多还原

【Abstract】 For the configuration and the working state of a certain excavator,the main noise source is identified.The acoustic simulation model of the whole machine is established.The whole model is calculated by using the statistical energy analysis(SEA) and semi-infinite fluid method in high frequency range.Simulation results and the experimental measurement of radiated noise sound power level is less than 3 dB(A).The main transmission path of vibration noise source is identified,and damping material is applied on the key position of the path to reduce vibration and noise.The results show that SEA and semi-infinite fluid method can not only simplify the modeling steps,but also meet the requirements of radiated noise prediction for excavator products in the development and design stage.更多还原