基于结构-声耦合法研究高铁铝型材的隔声性能  

Sound insulation performance analysis of high-speed train aluminum extrusions based on structure-sound coupling method

作　　者：罗乐[1] 郑旭[1] 郝志勇[1] 吕义[2] 

机构地区：[1]浙江大学能源工程学系,浙江杭州310027 [2]长春轨道客车股份有限公司,吉林长春130000

出　　处：《中南大学学报（自然科学版）》2015年第9期3513-3519,共7页Journal of Central South University:Science and Technology

基　　金：国家高科技研究发展计划(863计划)资助项目(2011AA11A103)~~

摘　　要：采用脉冲衰减法测量得到铝型材的内损耗因子作为仿真的结构阻尼参数,应用结构-声耦合法计算铝型材样件在100～1 600 Hz中心频段内的隔声量（STL）,并通过与试验对比,验证仿真方法的可靠性。选取3种不同几何断面的铝型材并对比其隔声性能。研究结果表明：侧墙铝型材的隔声性能相对最优,面密度最大的地板铝型材次之,顶板铝型材在500～1 250 Hz内有较宽的隔声谷,隔声性能最差。Impulse response decay method was proposed to estimate internal loss factor of the aluminum extrusion, which was defined as the structure damping parameter in simulation. Then the sound transmission loss（STL） curves of aluminum extrusion sample between 100 and 1 600 Hz were calculated by structure-sound coupling method, which was validated in comparison with experiment results. STL of aluminum extrusions with three different cross-sections were computed and analyzed contrastively. The results indicate that the sound insulation of side extruded panel is the best, followed by the floor panel with the largest surface density. The roof panel, whose STL curve has a broad band valley between 500 and 1 250 Hz, possesses the worst sound insulation performance.

关 键 词：高速列车 铝型材 结构-声耦合 隔声量 内损耗因子 

分 类 号：TB532[理学—物理]