High accuracy estimation technique of radiated sound from structural vibration by virtual sensing

Abstract

The present study is concerned with the application of radiated sound simulation by the virtual sensing. The virtual sensing is a method to estimate unobservable or unmeasurable state variables by combining exsisting measurement data with model information. When FE model is applied to the virtual sensing, vibration response data estimated at all nodes. Therefore, it enables to simulate sound radiation from mechanical structure with vibration response data. In this paper, it is illustrated how to estimate vibration response data, and simulate sound radiation. It then examines the effect of excitation force on the vibration estimation results. Based on the results of this verification, a method to improve the accuracy of vibration response estimation is proposed. Finally, it tests how the quality of estimation for sound radiation.