导航

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2018, Vol. 39 ›› Issue (8): 221893-221893.doi: 10.7527/S1000-6893.2018.21893

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

A high-frequency shock response analysis method based on energy finite element method and virtual mode synthesis and simulation

CHEN Zhaolin1, YANG Zhichun1, WANG Yongyan2, ZHANG Xinping3   

  1. 1. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;
    2. AVIC Chengdu Aircraft Design & Research Institute, Chengdu 610091, China;
    3. AVIC Shaanxi Aircraft Industry(Group) Corporation Ltd., Hanzhong 723213, China
  • Received:2017-11-24 Revised:2018-05-02 Online:2018-08-15 Published:2018-05-02
  • Supported by:
    National Natural Science Foundation of China (11472216)

Abstract: To analyze the transient response of structures under high-frequency shock load, a new method based on Energy Finite Element Method (EFEM) and Virtual Mode Synthesis and Simulation (VMSS) is proposed. The frequency band average of the Frequency Response Function (FRF) is obtained from steady-state analysis by energy finite element method, and then the virtual mode coefficients are calculated by virtual mode synthesis and simulation. Finally, the shock response of structures under high-frequency shock load is evaluated by Duhamel integral. Numerical simulations of a pinned-pinned beam are performed. The results obtained by the method proposed are compared with those obtained by the Finite Element Method (FEM) and Statistical Energy Analysis (SEA), showing that the proposed method is valid, and has the advantages of simple model, low computational cost, etc.

Key words: energy finite element method, virtual mode synthesis and simulation, high-frequency shock, transient response, shock response spectrum

CLC Number: