Efficient Calculation of SEA Input Parameters Using a Wave Based Substructuring Technique

This paper presents a new and efficient method to calculate point mobilities from subcomponents of a full structure. When performing dynamic analyses of subcomponents the result normally tends to strongly depend on the boundary condition selected for the component. The goal is to simulate the results one would have received if the full model would be analysed. Normally free or clamped boundary conditions are used. In this paper waves extracted in a Wave based substructuring analysis will be used to define a more realistic boundary condition. The results show great promise and for the three investigated cases the results are a better match to the reference calculation than both free and clamped boundary conditions. It is especially clear that the results are accurate for a wider frequency range. While free boundary condition can be suitable for high frequencies and less suitable for low frequencies and clamped boundary condition can be suitable for low frequencies but less suitable for high frequencies, the WBS boundary condition yields good results over the entire frequency range.