基于ANSYS的桥梁颤振时域分析及程序实现

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Abstract In order to avoid the error interference of inputting vibration frequency of matrix element MATRIX27 and simplify the repeated process of iterative determination of self-excited force in calculation, based on the impulse response function expression of self-excited force, the effects of different optimization algorithms in the aerodynamic derivative fitting were compared and studied. The iterative form for calculating the nonlinear term in the rational function expression of self-excited force was derived, and a method for modeling and solving time-domain flutter analysis of bridge based on MATRIX27 matrix element was proposed. The mixed programming technology of MATLAB and ANSYS was utilized to identify the flutter critical state of bridge. Wind-induced flutter analysis of simply supported beam bridge with ideal plate section and a long-span bridge was provided to verify the proposed method. The results show that the calculated responses of the proposed method are in good agreement with the theoretical ones, with the relative error no more than 1%. The calculations, meanwhile, don’t rely on the selection of time step. The proposed method can provide reference for solving complex nonlinear flutter problems with ANSYS.
Key words: bridge structure; time-domain flutter analysis; mixed programming; optimization algorithms

Key words： bridge structure time-domain flutter analysis mixed programming optimization algorithms

Received: 11 March 2021 Published: 15 July 2022

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	Articles by authors
	LIU Xiuping1
	LIU Huanju2
	ZHAO Yue3
	LI Guangling3

Cite this article:

LIU Xiuping1,LIU Huanju2,ZHAO Yue3, et al. Time domain analysis of bridge flutter and programming based on ANSYS[J]. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(13): 252-258.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2022/V41/I13/252

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