Hybrid deterministic-statistical analysis of vibro-acoustic systems with domain couplings on statistical components
Hybrid deterministic-statistical analysis of vibro-acoustic systems with domain couplings on statistical components
复制标题
DOI：
10.1016/j.jsv.2008.10.007
复制
发表时间：
2009-04-10
影响因子：
4.7
通讯作者：
Cordioll, Julio A.
中科院分区：
文献类型：
--
作者：
Langley, Robin S.;Cordioll, Julio A.
近年来发展了一种混合分析方法，该方法可以对复杂振声系统的各个组成部分进行确定性或统计建模。这两类分量之间的耦合是通过使用漫射场互易关系来实现的，该关系将其统计分量边界处的力的交叉谱与分量的振动能级联系起来。在实际应用中，组件可能在一个域上耦合，而不仅仅是在组件边界上-例如，板和声学体之间的耦合涉及板的表面。在本工作中表明，互易关系和混合方法可以推广到这种情况，例如，可以将板的统计模型耦合到声腔的有限元模型，或者耦合到统计声腔。统计声学和结构组件的耦合并不是新的，而是在统计能量分析（SEA）中常规进行的；本部分的工作表明，使用混合方法可以找到相关的耦合损失因子。通过数值算例对分析结果进行了说明。(C) 2008 Elsevier Ltd版权所有。
Recently a hybrid analysis method has been developed in which the various components of a complex vibro-acoustic system can be modeled either deterministically or statistically. The coupling between these two types of component is effected by using a diffuse field reciprocity relation, which relates the cross-spectrum of the forces at the boundary of it statistical component to the vibrational energy level of the component. In practical applications, components may be coupled over a domain, rather than just at the component boundaries-for example, the coupling between a plate and an acoustic volume involves the surface of the plate. It is shown in the present work that the reciprocity relation and the hybrid method can be extended to this situation, so that, for example, it is possible to couple a statistical model of a plate to a finite element model of an acoustical cavity, or to a statistical acoustical cavity. The coupling of statistical acoustical and structural components is not new, but rather is done routinely within statistical energy analysis (SEA); this part of the present work demonstrates that the relevant coupling loss factors can be found by using the hybrid method. The analysis is illustrated by various numerical examples. (C) 2008 Elsevier Ltd. All rights reserved.