Analysis of VIV induced fatigue damage of marine riser at two freedoms
SUN Lei1, DONG Xiao-Lei1, ZONG Zhi1, DONG Jing2, ZHOU Li1
1 School of Naval Architecture Engineering, Faculty of Vehicle Engineering and Mechanics, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China； 2 Grenland Group，Shanghai 201206，China
Abstract：By introducing Pseudo-excitation method of random vibration theory into the VIV calculation of marine riser, a numeral calculation method is established. The analysis of in-line and flow-cross random vibration response to marine riser is performed via the programming codes based on this method. Comparing the calculation results of the flow-cross response of riser with the experimental results, the feasibility of the application of Pseudo-excitation method of random vibration theory to the VIV calculation of marine riser is verified. The computing time are recorded to validate the high calculation efficiency of this new method. The fatigue damage rate of the riser per year is evaluated and the service life of the riser can be predicted based on the P-M criterion. A reference to the calculation of VIV response and engineering design of marine riser is provided by the method.
2012, Vol. 31 
