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A METHOD, APPARATUS AND COMPUTER PROGRAM PRODUCT FOR THE FINITE ELEMENT ANALYSIS OF FREQUENCY DEPENDENT BEHAVIOUR OF NONLINEAR MATERIALS AND CONTACTS
A METHOD, APPARATUS AND COMPUTER PROGRAM PRODUCT FOR THE FINITE ELEMENT ANALYSIS OF FREQUENCY DEPENDENT BEHAVIOUR OF NONLINEAR MATERIALS AND CONTACTS
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机译:非线性材料和接触的频率依赖行为有限元分析的方法,装置和计算机程序产品
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摘要
The present invention relates to an analysis method, apparatus and computer software for the analysis for the frequency behaviour of assemblies containing nonlinear materials, and contacts between a plurality of components comprised in the assemblies. In accordance to the present invention, the frequency behaviour of assemblies containing nonlinear materials, and contacts between a plurality of components comprised in the assemblies is analysed by dividing a volume and a contact area of the assemblies into a plurality of finite elements characterized by a plurality of frequency and displacement dependent matrices, linearizing an equation characteristic for the frequency behaviour of the assemblies, solving the characteristic equation in a frequency domain, performing a first stage projection in a time domain to reduce a number of degrees of freedom of said plurality of finite elements from a number of said plurality of finite elements to a number of relevant modes, performing a second stage projection in the frequency domain, and calculating a plurality of Fourier series coefficients describing the frequency behaviour of the assemblies.
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