CAJ | 학술논문

海洋环境变化多端，钢悬链线立管（ SCR）在复杂的环境荷载作用下容易发生疲劳破坏而影响安全，为研究立管在环境荷载作用下的动力响应，本文利用ABAQUS有限元软件对SCR建模，在立管上部悬挂点施加位移边界条件模拟浮体的运动，在立管的触地段采用刚度基于P-y曲线的非线性弹簧单元模拟立管与海床的相互作用，并通过调节立管环境荷载参数，研究了浮体运动、波浪振幅、周期和海流速度等参数对钢悬链线立管动力响应的影响。结果表明：钢悬链线立管随着环境荷载参数的变化呈现出不同的动力响应，立管对浮体的垂荡运动更敏感；波浪的振幅越大、周期越小，立管触地点与悬挂点的动力响应越大；海流速度增大，悬垂段长度会变大。
해양배경변화다단，강현련선립관（ SCR）재복잡적배경하재작용하용역발생피로파배이영향안전，위연구립관재배경하재작용하적동력향응，본문이용ABAQUS유한원연건대SCR건모，재립관상부현괘점시가위이변계조건모의부체적운동，재립관적촉지단채용강도기우P-y곡선적비선성탄황단원모의립관여해상적상호작용，병통과조절립관배경하재삼수，연구료부체운동、파랑진폭、주기화해류속도등삼수대강현련선립관동력향응적영향。결과표명：강현련선립관수착배경하재삼수적변화정현출불동적동력향응，립관대부체적수탕운동경민감；파랑적진폭월대、주기월소，립관촉지점여현괘점적동력향응월대；해류속도증대，현수단장도회변대。
The marine environment is changeful .The steel catenary riser is prone to produce fatigue dam-age so as to affect the safety of production on effect of complex marine environmental load .In order to study the dynamic response of the riser under environmental load , the paper built SCR model by use finite element software ABAQUS .By applying displacement boundary condition on the upper suspension point of the riser to simulate the movement of floating body , using the nonlinear spring whose stiffness is based on P-y curve to simulate the riser-soil interaction , adjusting the parameters of environmental load on the ris-er,it studied the influence of floating body motion , wave amplitude , wave period and current velocity on SCR dynamic response .The results show that the steel catenary riser presents different dynamic response with the change of environmental load , the riser is more sensitive to heaving motion of floating body;the larger the wave amplitude ,the less is its period , the larger the dynamic response of the riser on suspen-sion point and touchdown point;with the increase of current speed , the overhanging length gets bigger .