钦州某油码头沉箱内力数值分析

利用有限元分析软件ANSYS,对沉箱重力式码头在船舶荷栽作用下的沉箱静态力学性能进行数值分析.通过对比分析文革勒地基模型法和半无限弹性体法的计算结果,认为壳单元与体单元采用MPC接触方法,土体以弹簧来模拟的计算模型能够满足设计要求,建模简单,计算快捷,可供设计时使用.同时数值分析表明,在船舶荷载和贮仓压力作用下,沉箱立板内侧的竖向弯矩最大值发生在立板与底板的连接处,有必要对重力式孤立墩在船舶荷载作用下的沉箱进行空间结构计算.

Numerical analysis of caisson internal force for an oil wharf in Qinzhou

Using finite element procedure ANSYS, we analyze caisson gravity wharf acted by the vessel load in the static condition. Comparing the Winkler foundation model with the semi-infinite elastic body model, we find out that by taking the MPC (Multi Point Constraint) to join the shell elements with the solid elements, and simulating the soil by the elastic spring, the design requirements can be satisfied. Meanwhile, it has the advantages of simple model construction and quick calculation. The numerical analysis indicates that the maximum moment of vertical slab of caisson occurs in the comer between the vertical slab and the bottom slab. So, we think it is necessary to conduct space structure calculation when the isolated caisson gravity wharf is acted by the vessel load.