簡易接合要素を用いた有限要素法による安全弁の機能シミュレーション

概要

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This paper analyzes the behavior of a commercial safety valve which acts at the expected internal pressure under the condition of high temperature by simulation using the FEM. In this case the analysis should be dealed with as an axisymmetric contact problem between a disk and a nozzle seat of the safety valve, and take into account the effect of high temperature on deformation and stress. So the combined model of two finite elements which has been derived by three of authors in 1989 is extended for thermal stress problems. The behavior of the valve with the increase of pressure became clear by the numerical analysis. The analysis is applied to two more valves which have different shapes of a disk from the above. The results suggest that the pressures which the valves act at depend on the loads by springs and the behaviors with the increase of pressure depend on the disk shapes. Compared with three valves, it seems that the commercial safety valve has an adequate shape of a disk.
日本シミュレーション学会の論文
1996-06-15