The Use of Inverse BEM, Coupled FEM-Multidomain BEM, and Transfer Path Analysis in Solving Complex Noise Problems

摘要

This paper presents a comprehensive approach in applying various acoustic numerical methodsto solve a complex noise problem, in this case, a reciprocating compressor. In the initial stage ofthe evaluation, the inverse BEM was used to reconstruct the operational vibration on the surfaceof the compressor, with the primary objective of identifying noise contributions from differentparts of the compressor shell. To better understand the noise generation mechanisms, a coupledFEM-BEM model was developed to simulate the interaction between the internal structures andacoustic cavities. A numerical Transfer Path Analysis (TPA), combined with measured data, wasthen used to identify the internal excitations of the compressor. The numerical models werevalidated against test data, and were used to predict the effect of design changes