Applied Mathematics and Mechanics (English Edition) ›› 2022, Vol. 43 ›› Issue (6): 845-862.doi: https://doi.org/10.1007/s10483-022-2857-6

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Vibration of fluid-conveying pipe with nonlinear supports at both ends

Sha WEI1, Xiong YAN1, Xin FAN2, Xiaoye MAO1, Hu DING1, Liqun CHEN1   

  1. 1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Mechanics in Energy Engineering, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, China;
    2. School of Engineering Science, University of Science and Technology of China, Hefei 230026, China
  • Received:2021-12-27 Revised:2022-03-27 Published:2022-06-11
  • Contact: Liqun CHEN, E-mail:lqchen@shu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China (Nos. 12072181 and 12121002) and the State Key Laboratory of Mechanical System and Vibration of China (No. MSV202105)

Abstract: The axial fluid-induced vibration of pipes is very widespread in engineering applications. The nonlinear forced vibration of a viscoelastic fluid-conveying pipe with nonlinear supports at both ends is investigated. The multi-scale method combined with the modal revision method is formulated for the fluid-conveying pipe system with nonlinear boundary conditions. The governing equations and the nonlinear boundary conditions are rescaled simultaneously as linear inhomogeneous equations and linear inhomogeneous boundary conditions on different time-scales. The modal revision method is used to transform the linear inhomogeneous boundary problem into a linear homogeneous boundary problem. The differential quadrature element method (DQEM) is used to verify the approximate analytical results. The results show good agreement between these two methods. A detailed analysis of the boundary nonlinearity is also presented. The obtained results demonstrate that the boundary nonlinearities have a significant effect on the dynamic characteristics of the fluid-conveying pipe, and can lead to significant differences in the dynamic responses of the pipe system.

Key words: gyroscopic system, fluid-conveying pipe, transverse vibration, nonlinear boundary

2010 MSC Number: 

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