Prediction of Impact Noise
Impact noise characterized by high peak value and short duration is a very common source of noise in industry and in many cases it can be summed up in the noise radiated by the collision of two cylinders. Our customer at Xi’an Jiaotong University in China established a modified theoretical prediction model based on the Palmgren’s cylinder contact empirical model and acoustics theory. The students presented a numerical simulation combining the finite element method (FEM) and the transient boundary element method to verify the modified theoretical model.
For experimental validation, they used the m+p SO Analyzer for dynamic signal analysis along with a 4-channel USB-powered acquisition module from National Instruments.
Read more in the 8-page paper “Theoretical and numerical investigation on impact noise radiated by collision of two cylinders”.