| Thermal stress is one of the important potential risks in navel architecture and ocean engineering structures. Ordinary ships usually consider influence of thermal stress into the safety factor, but many special ships and Marine equipment always need to consider the effect of temperature stress, such as LNG ship, oil tanker and transporting pipeline equipment. In this work, the cell-based smoothed point interpolation method (CS-PIM) is further applied for thermoelastic problems, for which a FEM model generally results in bad accuracy of numerical results due to the natural property of overly-stiff problem. In the scheme of CS-PIM, the computational domain is firstly discretized into triangular background cells, the generalized gradient smoothing operation is then conducted upon the cells, and shape functions are constructed using the point interpolation method. The model stiffness is effectively softened, the computational cost for both CS-PIM and the FEM models are of same order and the CS-PIM can achieve better accuracy and convergence of temperature and thermal stress than the traditional finite element method does under the same mesh. |
