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載人航天器密封艙噪聲控制與試驗(yàn)

Noise control and verification for manned spacecraft pressurized cabin

  • 摘要: 載人航天器密封艙為航天員工作和生活的場(chǎng)所，需對(duì)航天員工作區(qū)和睡眠區(qū)進(jìn)行噪聲控制。文章以某中期駐留載人航天器為例，對(duì)其密封艙內(nèi)的主要噪聲源進(jìn)行識(shí)別，并從吸聲、隔聲、消聲、減振4個(gè)方面針對(duì)主要噪聲源進(jìn)行噪聲控制。根據(jù)航天器實(shí)際噪聲源和控制措施，構(gòu)建了噪聲計(jì)算模型，通過(guò)仿真分析獲取了艙體內(nèi)聲壓級(jí)水平分布，并對(duì)艙內(nèi)噪聲分布進(jìn)行實(shí)際測(cè)試。仿真結(jié)果和測(cè)試結(jié)果表明噪聲控制方案滿足指標(biāo)要求，噪聲源識(shí)別準(zhǔn)確，控制措施有效。

     

    Abstract: 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 ofa 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.

     

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