Making a finite element model for pressure vessel and piping is laborious work and time-consuming. General purpose programs have a special mesh generation tool, which produces finite element model to be used in the analysis of structure, where automatic meshes are generated based on geometrical properties. Obtained mesh shape is generally irregular for complex structures. The present paper shows a development method of finite element model by assembling finite element models for structural component to the whole structure, as is seen in the procedure of actual structures. The finite element component models are prepared for cylindrical shell, spherical shell and nozzle etc., and finite elements for these components are connected to each other to build a whole structure. The present paper presents an application of 3D FE modeling by the proposed method, to show the features and mesh examples.

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