低压舱舱内噪声分析与实验研究

Analysis and Experimental Study of Cabin Noise in Low-Pressure Cabin

低压舱舱内噪声对舱内人员的身心健康有很大影响,国内部分低压舱在降压时噪声超过65 dB,为探讨影响舱内噪声的关键因素,设计正交实验分析新风量和压力两个因素在不同水平组合下舱内噪声水平。使用fluent对低压舱降压过程进行仿真模拟,得到新风量大小是影响低压舱舱内噪声大小的关键因素。对舱内噪声进行采集分析,结果显示舱内噪声频率范围主要集中在20 Hz~500 Hz内,将实验结果和仿真结果相比较,结果趋于一致,验证了仿真方法的可靠性,为降低舱内噪音,优化舱内环境提供参考。

In order to explore the key factors affecting cabin noise,orthogonal experiments were designed to analyze the cabin noise level under the combination of fresh air volume and pressure at different levels.The depressurization process of the low-pressure chamber was simulated by fluent,and it was found that the fresh air volume was the key factor affecting the noise in the low-pressure chamber.The results show that the frequency range of cabin noise is mainly concentrated in the range of 20 Hz~500 Hz,and the experimental results are compared with the simulation results,and the results tend to be consistent,which verifies the reliability of the simulation method and provides a reference for reducing the cabin noise and optimizing the cabin environment.