Applied Mathematics and Mechanics (English Edition) ›› 2022, Vol. 43 ›› Issue (10): 1555-1568.doi: https://doi.org/10.1007/s10483-022-2903-7

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Nonlinear vibration analysis of pipeline considering the effects of soft nonlinear clamp

Weijiao CHEN1, Yiming CAO1, Xumin GUO1, Hui MA1,2, Bangchun WEN1, Bo WANG1   

  1. 1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China;
    2. Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of China, Northeastern University, Shenyang 110819, China
  • Received:2022-01-11 Revised:2022-08-10 Published:2022-10-25
  • Contact: Hui MA, E-mail: mahui 2007@163.com
  • Supported by:
    the National Natural Science Foundation of China (No. 11972112), the Fundamental Research Funds for the Central Universities of China (Nos. N2103024 and N2003014), and the National Science and Technology Major Project of China (No. J2019-I-0008-0008)

Abstract: Soft nonlinear support is a major engineering project, but there are few relevant studies. In this paper, a dynamic pipeline model with soft nonlinear supports at both ends is established. By considering the influence of the Coriolis force and centrifugal force, the dynamical coupling equation of fluid-structure interaction is derived with extended Hamilton's principle. Then, the approximate analytical solutions are sought via the harmonic balance method. The amplitude-frequency response curves show that different effects can be determined by approximate analysis. It is demonstrated that the increase in the fluid velocity can increase the amplitude of the pipeline system. The frequency range of unstable response increases when the fluid pressure raises. The combination of the soft nonlinear clamp and the large geometrical deformation of the pipeline affects the nonlinear vibration characteristic of the system, and the external excitation force and damping have significant effects on the stability.

Key words: clamp soft nonlinear support, harmonic balance method, fluid-structure interaction, pipeline vibration analysis

2010 MSC Number: 

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