噪声载荷作用下航空薄壁壳体的随机振动响应

噪声载荷作用下薄壁壳体的振动应力响应分析是声疲劳研究的重要任务之一。首先利用声学分析软件SYSNOISE 5.6提供的流固耦合分析功能,计算了噪声激励下航空薄壁壳体的频域动态复位移响应,再将频域复位移响应导入ANSYS 10.0并经傅立叶变换转换为时域位移数据,最后基于时域位移响应在ANSYS10.0中计算出声激励环境下薄壁壳体的振动应力响应。

Random vibration response of an aeronautical thin-shell to acoustic excitation

Random vibration response analysis of thin-shells excited by acoustic loads is one of the important tasks of sonic fatigue investigation.This paper first calculates the frequency domain complex displacement responses of a thin shell excited by acoustic loads using the acoustic analysis software SYSNOISE 5.6 which provides the function to analyze fluid-solid coupling problems.Then the complex displacement responses in frequency domain are transmitted into ANSYS 10.0 and transformed into time domain displacement data by IFFT.Finally,the vibration stress responses to acoustic excitations of the thin sell are calculated in the ANSYS environment based on the time domain displacement responses.