无变形网格下运动参考系求解平动流固耦合问题

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Abstract

A new approach using fixed gird was adopted to simulate the translational motion of solid walls.Combining with a high-accuracy and high-stability algorithm in the condition of non-structured mesh,a solution over entire computational domain was achieved by use of the moving reference frame,which must be taken to consider the convection term of N-S equation.Meanwhile,the boundary conditions of the solid wall were specially treated with a new method.A reasonable computational domain was established to simulate the translational motion of a circular cylinder in the fluid with low Reynolds number of 200 and the vibration amplitude of the cylinder and the detailed flow field structure were obtained.Changing the ratio of the cylinder natural frequency to its wake vortex shedding frequency and the structural damping ratio,the vortex induced vibration amplitudes and the wake flow structures in the condition of different vibration amplitudes were compared and analysed.The results show that the computational method provided tends to be feasible and accurate.

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moving reference frame vortex induced vibration moving boundary conditions wake characteristics,frequency ratio

Received: 11 May 2016 Published: 15 March 2017

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	Articles by authors
	ZHAN Qingliang
	ZHOU Zhiyong
	GE Yaojun

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ZHAN Qingliang,ZHOU Zhiyong,GE Yaojun. Translational fluid-structure interactive vibration simulation using fixed grid and moving reference frame[J]. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(6): 114-121.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2017/V36/I6/114

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