Title :
Acoustic Analysis of a Structure Subjected to Stochastic Excitation Using Statistical Wave Superposition Approach
Author :
Zhang Bingrong ; Chen Litao ; Chen Jian
Author_Institution :
Anhui Key Lab. of Vehicle NVH & Reliability, Hefei Univ. of Technol., Hefei, China
Abstract :
Most mechanical vibration of machines is a random process that has certain characteristics. The traditional wave superposition method can not solve the acoustic radiation problem with the random boundary condition. In this paper, the statistical wave superposition method is proposed, combining the wave superposition method with the statistical method to calculate the random acoustic field through the auto-spectrum of velocity on the structure surface. According to the simulations of the vibrating sphere and the cubic body, it is proved that the method proposed in this paper can give good results which caused by the stochastic excitation in a wide frequency band, and the errors is only 0.21% and 1.3%, respectively.
Keywords :
acoustic field; acoustic wave propagation; random processes; statistical analysis; vibrations; acoustic analysis; acoustic radiation; auto-spectrum; cubic body; machine; mechanical vibration; random acoustic field; random boundary condition; statistical wave superposition; stochastic excitation; structure surface; vibrating sphere; Acoustic waves; Boundary conditions; Equations; Frequency; Random processes; Statistical analysis; Stochastic processes; Surface acoustic waves; Transfer functions; Vibrations;
Conference_Titel :
Image and Signal Processing, 2009. CISP '09. 2nd International Congress on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4129-7
Electronic_ISBN :
978-1-4244-4131-0
DOI :
10.1109/CISP.2009.5304192
