隔声量计算的边界元-有限元-统计能量法

发布时间：2018-01-28 00:46

本文关键词： 振动与波 BFS方法有限元法驻波管隔声量　出处：《噪声与振动控制》2016年06期 　论文类型：期刊论文

【摘要】：提出边界元-有限元-统计能量(BEM+FEM+SEA,简称BFS)混合方法模拟驻波管,即BFS驻波管模拟法,计算材料的隔声量。探究了不同边界条件对BFS驻波管模拟法隔声量计算结果的影响;通过与有限元(FEM)驻波管模拟法、有限元-统计能量(FEM+SEA,简称FS)混响室模拟法以及瑞利-李兹理论法所得隔声量对比,验证BFS方法的有效性和精度。结果表明,BFS驻波管模拟法能够较为准确地模拟驻波管,得到待测材料的隔声量,相对于有限元(FEM)驻波管模拟法,能够有效解决震荡问题,减小计算量,提升计算速度,可适用于全频段声学材料性能的计算和评估,弥补实验手段耗时费力的缺点,尤其是在新产品的开发阶段具有一定的实际意义。
[Abstract]:The boundary element finite element statistical energy method BEM FEM beam (BFS) hybrid method is proposed to simulate the standing wave tube (VSWT), that is, the BFS VSWT simulation method. The influence of different boundary conditions on the results of BFS standing wave tube simulation method is investigated. The sound insulation is compared with the finite element FEM-VSWT simulation method, the finite element statistical energy FEM SEAA method and the Rayleigh Leeds theory method. The effectiveness and accuracy of the BFS method are verified. The results show that the VSWT simulation method can simulate the VSWT accurately and obtain the sound insulation of the material to be measured. Compared with the finite element (FEM) standing wave tube simulation method, it can effectively solve the oscillation problem, reduce the amount of calculation, improve the calculation speed, and can be applied to the calculation and evaluation of acoustic material performance in all frequency band. It is of practical significance to make up for the time-consuming and laborious shortcomings of experimental methods, especially in the development stage of new products.
【作者单位】：上海交通大学船舶海洋与建筑工程学院海洋工程国家重点实验室高新船舶与深海开发装备协同创新中心;
【基金】：国家自然科学基金资助项目(51479115)
【分类号】：TB302
【正文快照】： 实验测定材料吸声性能主要有驻波管法和混响室法两种手段。驻波管法实验设备简单,测试精度可接受,缺点在于不能完全模拟真实的声学环境[1 2];混响室法模拟实际受声环境,但实验成本高,难度大[3]。总体来说,实验方法测定材料吸声性能对设备、环境以及人员的要求较高,需要耗费较

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