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Acta Aeronautica et Astronautica Sinica ›› 2026, Vol. 47 ›› Issue (3): 232322.doi: 10.7527/S1000-6893.2025.32322

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles    

A symplectic-wave-based method for random vibration analysis of orthotropic cylindrical shells

Jiaqi MI1, Yongping JIANG2, Ruxin GAO1,2,3()   

  1. 1.Institute of Advanced Structure Technology,Beijing Institute of Technology,Beijing 100081,China
    2.National Key Laboratory of Strength and Structural Integrity,Xi’an 710065,China
    3.State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology,Dalian 116024,China
  • Received:2025-05-30 Revised:2025-07-28 Accepted:2025-08-11 Online:2025-08-19 Published:2025-08-18
  • Contact: Ruxin GAO E-mail:gaoruxin@bit.edu.cn
  • Supported by:
    Open Project of the National Key Laboratory of Strength and Structural Integrity(ASSIKFJJ202303003);Optimization and CAE Software for Industrial Equipment(GZ23101);Open Project of the State Key Laboratory of Structural Analysis

Abstract:

A symplectic-wave-based method is proposed for the random vibration analysis of orthotropic cylindrical shells under turbulent boundary layer. Firstly, based on the semi-empirical model of turbulent boundary layer, the random vibration response of orthotropic cylindrical shells under turbulent boundary layer is transformed into harmonic response. Then, according to Kirchhoff-Love theory and Legendre transformation, the unified governing equation is obtained from the fundamental equations for orthotropic cylindrical shells under axial compression in the Lagrangian system transferring into the Hamiltonian system. And, the harmonic response of orthotropic cylindrical shells is solved through wave propagation analysis. Finally, both the state vector and excitation are expanded to obtain circumferential superposition form of the solution by applying the superposition principle of linear differential equation solutions. By combining symplectic orthogonality with the solution for first-order linear differential equations, the harmonic response is obtained. Compared with the modal superposition method, the proposed method can analytically handle arbitrary boundary conditions with higher convergence speed and computational accuracy. Numerical examples validate the convergence and effectiveness of the method, and the influence of axial compression variations on the random vibration response of orthotropic cylindrical shells is analyzed.

Key words: turbulent boundary layer, orthotropic cylindrical shells, random vibration, symplectic-wave-based method, axial compression

CLC Number: