载人航天器密封舱噪声控制与试验

Noise control and verification for manned spacecraft pressurized cabin

载人航天器密封舱为航天员工作和生活的场所,需对航天员工作区和睡眠区进行噪声控制。文章以某中期驻留载人航天器为例,对其密封舱内的主要噪声源进行识别,并从吸声、隔声、消声、减振4个方面针对主要噪声源进行噪声控制。根据航天器实际噪声源和控制措施,构建了噪声计算模型,通过仿真分析获取了舱体内声压级水平分布,并对舱内噪声分布进行实际测试。仿真结果和测试结果表明噪声控制方案满足指标要求,噪声源识别准确,控制措施有效。

The pressurized cabin of a manned spacecraft provides the working and living places for astronauts, where it is necessary to control the noise. This paper carries out a case study of a medium-term-resident manned spacecraft to identify the main noise sources, and to control the main noise sources by absorption, insulation, elimination and attenuation. A noise model is built based on the noise sources and the control measures for spacecraft. An estimation of the noise levels and the distributions is made by the numerical simulation, and the noise distribution is measured experimentally in the cabin. The simulation results and the measurements indicate that the present noise control method can satisfy the requirements of the noise control.