Semi-analytical dynamic modeling and support location optimization of pipeline system with multi-clamp support

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (19) : 32-40.

LIU Xudong1,2, SUN Wei1,2

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Abstract

In dynamic design of aero-engine piping system, it is necessary to avoid the engine’s exciting frequencies which are mainly working frequencies of high-pressure and low-pressure rotor systems as far as possible to improve the reliability of the piping system. Here, a single pipe system supported by multi-clamp was taken as the study object, and a method based on particle swarm optimization was proposed to realize optimal layout of clamps and effectively avoid vibration. Considering the system belonging to a statically indeterminate structure, a method of modeling pipe and clamps separately was proposed. Firstly, the pipe body was modeled under free boundary condition, and then clamps were introduced into the pipe system in form of spring. At the same time, in modeling process, the non-uniform distribution spring group was proposed to simulate clamp supports and improve the model analysis accuracy. Taking clamp positions as design variables, an optimization model of the pipe clamp layout was created to simultaneously avoid two exciting frequencies. Furthermore, the calculation process of applying particle swarm optimization algorithm to optimize the pipe clamp layout was given. Finally, a case study was performed, the rationality of the created semi-analytical model was verified by tests, and the optimal clamp layout was obtained by using the proposed optimization method to simultaneously avoid two exciting frequencies.

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pipeline system with multi-clamp support / semi-analytical method / avoiding vibration optimization / particle swarm optimization

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LIU Xudong, SUN Wei. Semi-analytical dynamic modeling and support location optimization of pipeline system with multi-clamp support[J]. Journal of Vibration and Shock, 2021, 40(19): 32-40

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