Development of a hybrid FE-SEA-experimental model
Development of a hybrid FE-SEA-experimental model
复制标题
混合 FE-SEA 实验模型的开发
DOI：
10.1016/j.jsv.2019.03.027
复制
发表时间：
2019
影响因子：
4.7
通讯作者：
Clot A
中科院分区：
文献类型：
--
作者：
Clot A
具有不确定特性的复杂结构的振动声学响应是现代工业高度关注的问题。近年来，许多研究致力于预测中频范围内的这种响应，因为有限元分析和统计能量分析都不合适，因此混合确定性统计方法成为合适的解决方案。尽管具有潜力，但具有过于复杂而无法进行数值建模的活动组件的系统的存在可能会限制该方法的应用。然而，仍然可以通过实验测量这些结构的动态响应。因此，本文关注将实验数据整合到混合确定性统计方法中的可能性。为了解释新方法，使用了两个类似的案例研究，其中包括使用无源隔离器耦合到统计板接收器的确定性源结构。对于每种情况，通过实验确定振动激励（使用原位阻挡力测量、源结构移动性和隔离器刚度来表征）并将其插入到所提出的系统混合模型中。本文解释了用于获取所考虑的实验数据的技术以及为描述系统而提出的理论模型。为了验证所提出的方法，将两个案例研究中接收器板的预测振动响应与通过实验随机化板获得的响应进行比较。结果表明，接收器结构的集合平均响应和该响应的集合方差都获得了良好的一致性。此外，混合方法预测的置信上限很好地包含了实验结果的集合。最后讨论了预测响应与实验测量之间观察到的一些窄带差异的原因。因此得出的结论是，通过结合规定活动子系统的实验数据，可以明显增强混合确定性统计方法的能力。
The vibro-acoustic response of complex structures with uncertain properties is a problem of great concern for modern industries. In recent years, much research has been devoted to the prediction of this response in the mid-frequency range where, because neither finite element analysis nor statistical energy analysis are appropriate, a hybrid deterministic-statistical approach becomes a suitable solution. Despite its potential, the existence of systems with active components that are too complex to be modelled numerically can limit the application of the method. However, it may still be possible to measure the dynamical response of these structures experimentally. This paper is hence concerned with the possibility of integrating experimental data into a hybrid deterministic-statistical method. To explain the new methodology, two similar case studies, consisting of a deterministic source structure that is coupled to a statistical plate receiver using passive isolators, are used. For each case, the vibratory excitation, characterised using in-situ blocked force measurements, the source structure mobility, and the isolators stiffness are experimentally determined and inserted in the proposed hybrid model of the system. The paper explains the techniques used for obtaining the considered experimental data and the theoretical model proposed for describing the systems. To validate the proposed approach, the predicted vibration response of the receiver plate is compared to the one obtained by experimentally randomising the plate in both case studies. The results show that a good agreement is obtained, both for the ensemble average response of the receiver structure and for the ensemble variance of this response. Moreover, the upper confidence bounds predicted by the hybrid method enclose well the ensemble of experimental results. The cause of some narrow-band differences observed between the predicted response and the experimental measurements is finally discussed. It is therefore concluded that the capabilities of the hybrid deterministic-statistical method can be clearly enhanced through the incorporation of experimental data prescribing active sub-systems.
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DOI：
--
发表时间：
1997
期刊：
影响因子：
--
作者：
B. Cimerman;T. Bharj;G. Borello
通讯作者：
G. Borello
使用原位阻挡力法独立表征结构声源
DOI：
--
发表时间：
2016
期刊：
影响因子：
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作者：
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DOI：
--
发表时间：
1982
期刊：
影响因子：
--
作者：
J. Verheij
通讯作者：
J. Verheij
使用对偶公式和有限元模态信息计算海耦合损耗因数第 I 部分：理论
DOI：
--
发表时间：
2019
期刊：
影响因子：
--
作者：
L. Maxit
通讯作者：
L. Maxit
影响因子：
4.7
作者：
A. Elliott;A. Moorhouse;T. Huntley;S. Tate
通讯作者：
A. Elliott;A. Moorhouse;T. Huntley;S. Tate