自升式平台二次弯矩载荷计算与施加方法对比

摘要

考虑到自升式平台的二次弯矩载荷作为其承受载荷的重要组成部分,各船级社规范中对其均提出了考虑的要求,但仅给出了二次位移的计算方法,对于在有限元计算过程中如何将其施加到模型中并未给出明确的指导,利用ANSYS软件的非线性求解器,考虑大位移对计算结果的影响,对各种载荷施加方法进行综合评价.对比计算发现各载荷施加方法对桩腿的具体受力情况影响颇大,以弯矩的形式施加与平台约束点的方法最为合理.证实了SACS软件在自升式平台P-deta载荷自动计算和施加的适用性.%The second order moment is an important part of load for jack-up units, and it is required to be considered in strength analysis, but there is no guidance of the apply method.A synthesis evaluation was given after comparing the analysis result of ANSYS nonlinear solution with that of different apply methods used in engineering.It's most reasonable to apply the second order moment on the pin point by node moment.The applicability of SACS is confirmed in the auto calculate and apply of P-delta load for jack-up units.