ESTIMATION OF VIBRATIONAL POWER IN BUILT-UP SYSTEMS INVOLVING BOX-LIKE STRUCTURES, PART 1: UNIFORM FORCE DISTRIBUTION
ESTIMATION OF VIBRATIONAL POWER IN BUILT-UP SYSTEMS INVOLVING BOX-LIKE STRUCTURES, PART 1: UNIFORM FORCE DISTRIBUTION
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DOI：
10.1006/jsvi.1999.2774
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发表时间：
2000-05
影响因子：
4.7
通讯作者：
R. A. Fulford;B. Petersson
中科院分区：
文献类型：
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作者：
R. A. Fulford;B. Petersson
摘要对于组合结构的振动分析，传统的点连接方法在界面大、波长小的情况下不能应用。在这些情况下，必须考虑空间分布的波场，由此与界面相关联的场属性（即，速度、力）必须被认为在表面上是连续的，或者对于一维接触，沿沿着是连续的。由于这些分布的复杂性，最常见的分析是采用数值技术，而有效的方法，是有限的，很少透露有关系统的物理。因此，解决方案可能相当深奥，并且与设计结合，这使得技术使用起来很麻烦。作为一个走向克服这个问题的工作，提出了一个简化的分析方法，从该方法中获得的一个盒状结构的模型。该方法的基础是根据其傅立叶分量考虑分布力的空间特性，然后假设零阶，即，统一的成分占主导地位。这样，力的真实空间特征被保留，但以简化和基本的形式。这大大简化了建模。对于箱形结构，支持一个无限大的板状收件人，被认为是预测的振动功率和合格的结果建立。
Abstract For the vibration analysis of built-up structures traditional point-like connections cannot be applied where the interface is large and the wavelength is small. In these situations the spatially distributed wavefield has to be accounted for, whereby the field properties associated with the interface (i.e., velocity, force) have to be considered to be continuous over a surface or, for a one-dimensional contact, along a line. Due to the perceived complexity of these distributions it is most common for analyses to employ a numerical technique which, whilst efficient as a methodology, is limited in that little is revealed about the physics of the system. The solutions can therefore be rather esoteric and in conjunction with design this makes the techniques cumbersome to use. As a move towards overcoming the problem the work presented considers a simplified analytical approach from which a model of a box-like structure is obtained. The basis of the approach is to consider the spatial properties of distributed forces in terms of their Fourier components and then hypothesize that the zero order, i.e., the uniform component, is dominant. In this way, the true spatial characteristics of the forces are retained but in a reduced and elementary form. This greatly simplifies the modelling. For the box-like structure, supported by an infinite plate-like recipient, a prediction of the vibratory power is considered and qualifying results established.