基于实测扫频响应反推管路卡箍支承刚度及阻尼

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Abstract To establish the dynamic model of a pipeline system and analyze the vibration characteristics, it is necessary to obtain mechanical characteristic parameters of the hoop such as the support stiffness and damping under dynamic load.In this paper, a response surface method for identifying the parameters above was proposed, which was based on the measured sweep response.Firstly, an identification algorithm based on response surface was proposed to identify the stiffness and damping of the pipeline hoop.The dynamic model of the pipe-hoop system was created by the developed finite element method, and the vibration response of pipeline system was deduced.Then on the basis of response surface method, the polynomial fitting of stiffness and damping about frequency and corresponding response was carried out by the matching calculation, and the simple genetic algorithm was used for optimization.Finally, a case study was carried, and the support stiffness and damping with frequency-dependent characteristic were identified by the proposed method.By including identified values into the analysis model, the relative errors between predicted and measured resonance frequency and response are both less than 3% and then the reliability of the identified results was proved.

Key words： pipeline hoop support stiffness support damping frequency response inverse identification

Received: 27 November 2018 Published: 15 April 2020

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	GAO Ye1
	2
	SUN Wei1
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	MA Hui1
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Cite this article:

GAO Ye1,2,SUN Wei1, et al. Inverse identification of the pipeline support stiffness and damping of the hoop based on the measured sweep frequency response[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(8): 58-63.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I8/58

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