A numerical simulation method for predicting sound and vibration characteristics of big and complex cylindrical structures

作者：Miao, Xu Hong^*; Wang, Xue Ren; Jia, Di; Jin, Guo Yong; Pang, Fu Zhen

来源：Chinese Journal of Computational Mechanics, 2012, 29(1): 124-128+134.

• Complex cylindrical structures
• Coupled finite element method
• Double cylindrical shell
• Numerical simulation method
• Perfectly Matched Layer
• Underwater sound radiations
• Vibration and noise
• Vibration characteristics

It is much valuable to find a method for predicting the middle and high sound radiation characteristics of big and complex structures such as ships and airplanes. The Perfectly Matched Layer (PML) method is introduced and applied successfully to predict the underwater sound radiation characteristics of complex double cylindrical shell structures. Compared to the conventional coupled finite element method and boundary element method (FEM/BEM), it can reduce the fluid field model to more than 11/15 of the original. The ring frequency and the damping are two important factors for the practical cylindrical structures, and according to their effects to the vibration transmission, a modeling method for the big and complex cylindrical structures is present. Numerical results showed that the PML method and the modeling method are valid and can be applied to deal with engineering problems.

• 出版日期2012
• 单位哈尔滨工程大学