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作者机构:State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengdu 610031China State Key Laboratory of Polymer Materials Engineering/Polymer Research InstituteSichuan UniversityChengdu 610065China School of Urban Rail TransitChangzhou UniversityChangzhou 213164China
出 版 物:《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报(英文版)A辑(应用物理与工程))
年 卷 期:2020年第21卷第2期
页 面:129-146页
核心收录:
学科分类:082304[工学-载运工具运用工程] 08[工学] 080204[工学-车辆工程] 0802[工学-机械工程] 0823[工学-交通运输工程]
基 金:the National Key Research and Development Program of China(No.2016YFE0205200) the National Natural Science Foundation of China(No.U1834201)
主 题:Sound transmission loss(STL) Railway interior floor Boundary condition Mounting position Niche effect
摘 要:The sound insulation performance of railway car body structures is critical for the control of rail vehicle interior *** sound transmission loss(STL)measurements,a niche with a large depth is necessary to allow for mounting the wide range of thicknesses of railway car body panels and for the mechanical isolation of the two *** this study,two typical interior floor panels are tested in a series of mounting conditions and mechanical boundary *** change of STL results during measurement is also predicted by an STL prediction model based on the finite element *** lower frequencies,the STL results are influenced by both the mounting positions and the mechanical boundary *** higher frequencies,the STL results are mainly influenced by the mechanical boundary *** between the panel in the infinite baffle and niches at the resonance and off-resonance frequencies are *** both the effects of mounting positions and mechanical boundary conditions,the existence of the cavity amplifies the STL difference caused by the mechanical boundary conditions.