空调管路振动噪声计算与评价方法研究及应用

Research and application on calculation and evaluation method of vibration and noise of air conditioning pipeline system

通过建立准确的压缩机管路有限元模型和声学模型,以一个标准激励载荷对压缩机管路系统进行振动仿真,获取管路振动应力和表面振动速度等数据,将有限元仿真输出的振动数据作为声学激励进行振动噪声耦合仿真研究,从而计算出外部声场数据,该方法可用于进行变频空调器全转速工况下管路振动噪声评价及指导优化设计。进一步为解决噪声仿真计算效率和准确度问题,提出一种高效的噪声计算方法,借助计算机程序实现噪声的快速计算与自动评价,并通过试验测试验证了计算方法的准确性,该方法的提出避免了繁琐的声学仿真和网格划分尺寸的影响,满足了企业对仿真技术提出的高效和准确的要求。

The vibration and acoustic radiation of air conditioning pipeline system were simulated by using the vibration and noise coupling simulation method.By establishing accurate finite element model and acoustic model of compressor pipeline,and using a standard excitation load to analyze the vibration of compressor pipeline system,the data of pipeline vibration stress and surface vibration velocity were obtained.The vibration data output from the finite element simulation is used as acoustic excitation to simulate the sound radiation,and then the external sound field data is calculated.This method can be used to evaluate the vibration and noise of the variable frequency air conditioner under the condition of full speed and guide the optimal design of the pipeline.Further to solve the noise problem of efficiency and the accuracy of the simulation calculation,a highly efficient noise prediction method is put forward,with the aid of computer programs to realize efficient noise,fast calculation and evaluation,and the accuracy of the calculation method is verified by experimental test,the method avoids the tedious acoustic simulation and the infiuence of the grid,and satisfy the business enterprise high efficient and accurate requirements for simulation technology is put forward.