Thermal stress analysis of high temperature pipe using cell-based smoothed point interpolation method (CS-PIM)
LIU Yi jun, LU Huan, ZHANG Gui yong, ZONG Zhi
1. School of Naval Architecture Engineering, Dalian University of Technology, Dalian 116024, China;
2. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China
The cell-based smoothed point interpolation method (CS-PIM) was applied for thermoelastic problems in high temperature pipe system, for which a finite element method (FEM) model generally results in bad accuracy due to the natural overlystiff property. In the scheme of CS-PIM, the computational domain was discretized into triangular/tetrahedron background cells, Then the generalized gradient smoothing operation was conducted upon the cells and shape functions were constructed using the point interpolation method. Both 2D and 3D cases study were conducted .The CS-PIM can obtain similar convergence rate but better accuracy for temperature results than the FEM does with the same mesh. For thermal stress analysis, the method achieves better results about both accuracy and convergence than the traditional FEM owing to the effectively softened stiffness.
LIU Yi jun, LU Huan, ZHANG Gui yong, ZONG Zhi. Thermal stress analysis of high temperature pipe using cell-based smoothed point interpolation method (CS-PIM). JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2016, 50(11): 2113-2119.
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