Dynamic response analysis of deep-sea top tensioned riser by vector form intrinsic finite element method

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (11) : 218-223.

LI Xiao-min, ZHANG Lin,Niu Jian-jie,HAN Yong-qing, Guo Hai-yan

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Abstract

The vector form intrinsic finite element method (VFIFE) which is also called finite particle method (FPM), is an innovative method in the structural behavior analysis based on the vector mechanics and numerical calculations. In this method, the structure is discretized into finite particles which are connected by weightless elements that can only resist internal forces, and the motion of paticles follows Newton’s second law. The motion equation is solved by explicit time integration with central difference method. VFIFE is first adoped in the analysis of the dynamic behavior of top tensioned riser (TTR) and the plane beam element is adoped in the simulation of the interaction forces between the particles. The particle motion equation of the riser is derived and the corresponding solving program is compiled with Matlab. The dynamic behavior of the riser under the current and wave excitation is calculated and the results are compared with the results derived by finite element method (FEM). The analysis results show that the VFIFE is correct and effective in the dynamic behavior analysis of riser and it has more advantageous than traditional methods in the riser complex behavior analysis.

Key words

vector form intrinsic finite element method (VFIFE)；finite element method (FEM)；vector mechanics / top tensioned riser (TTR)

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LI Xiao-min, ZHANG Lin,Niu Jian-jie,HAN Yong-qing, Guo Hai-yan. Dynamic response analysis of deep-sea top tensioned riser by vector form intrinsic finite element method[J]. Journal of Vibration and Shock, 2016, 35(11): 218-223

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