Abstract
In this study, an automatic mesh generation algorithm was developed for efficient finite shell element modeling of piping systems with bellows. For pre-processing of finite element analysis, a pipe geometry should be modeled using meshing software. However, the finite element meshing process requires time-consuming efforts for complicated piping systems such as bellows. Therefore, this study proposed an algorithm that can efficiently generate finite shell elements automatically. To generate the finite shell element model of the pipe, this algorithm only needs the information of the centerline of the pipe and the corresponding radius that is identical to the finite beam element. Additionally, effects of bellows on the dynamic characteristics of a curved pipe were discussed. The variation of the natural frequencies and dynamic stiffness of the piping system with respect to the change of the location, height and width of the bellows were investigated. The suggested automatic mesh algorithm is advantageous for the modeling of pipes having complex shapes such as bellows. Hence, it has the potential to be useful in designing optimal bellows in piping systems that require numerous finite element analysis calculations.
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