25陈文炯，等：静压作用对吸声覆盖层性能的影响与分析2023年·第3期·总第204期本期特约静压作用对吸声覆盖层性能的影响与分析陈文炯卢辰周祥超（大连理工大学船舶工程学院大连116023）摘要：该文考虑静压作用产生的空腔变形及其预应力状态，建立空腔型吸声覆盖层吸声性能分析方法，研究静压作用对吸声覆盖层性能的影响规律。通过有限元法对比在相同静压下仅考虑空腔变形以及考虑空腔变形和同时存在预应力时的覆盖层吸声性能，进而研究了不同静压下含圆柱形、圆锥形和喇叭形空腔覆盖层在孔隙率相同时，覆盖层的最大变形量、平均吸声系数和吸声系数变化量等性能参数的差异。结果表明：仅考虑空腔变形以及考虑空腔变形和存在预应力时覆盖层的吸声性能有明显差异。静压使圆柱形空腔覆盖层的变形量最大，其次是喇叭形空腔覆盖层，圆锥形空腔覆盖层的最大变形量最小。静压对于3类覆盖层在2000Hz频率点以下的影响较小。随着静压的增加，圆柱形和圆锥形空腔的吸声系数曲线逐渐靠近，在10MPa下几乎重合。关键词：静压；吸声覆盖层；空腔变形；预应力；吸声性能中图分类号：U661.44文献标志码：ADOI：10.19423/j.cnki.31-1561/u.2023.03.025AnalysisontheEffectofHydrostaticPressureonthePerformanceofAcousticCoatingCHENWenjiongLUChenZHOUXiangchao(SchoolofNavalArchitecture&OceanEngineering,DalianUniversityofTechnology,Dalian116023,China)Abstract:Ananalyticalmethodforthesoundabsorptionperformanceoftheacousticcoatingwithcavitieshasbeenproposedtoinvestigatetheeffectofthehydrostaticpressureontheperformanceoftheacousticcoatingwiththeconsiderationofthedeformationandprestressofthecavities.Byusingthefiniteelementmethod,thesoundabsorptionperformanceoftheacousticcoatingthatonlyconsidersthedeformationofthecavitiesiscomparedwiththatoftheacousticcoatingthatconsidersthedeformationandprestressofthecavitiesunderthesamehydrostaticpressure.Thedifferencesofthemaximumdeformation,averageabsorptioncoefficientandabsorptioncoefficientvariationarethenstudiedfortheacousticcoatingwithcylinder,conicalandhorncavitiesunderthesameporosityanddifferenthydrostaticpressure.Theresultsshowthattherearesignificantdifferencesbetweenthesoundabsorptionperformanceoftheacousticcoatingthatonlyconsidersthedef...
