Studies of Appropriate Finite Element Modelling For Vibration Analysis. 1st Report. Databases of Regularly Triangular Shell Elements and Right-angled Triangular Shell Elements.

The purpose of this study is to build up a technical method for approximate prediction of a upper limit of confident frequencies, up to which accurate analysis of finite element models are available, and for approximate suggestion of adequate sizes of finite elements, which should form the objective structure models to be analyzed up to upper frequencies of interest. In this paper, according to the proposed method, data-bases of upper limits of confident frequencies are developed for regularly triangular shell elements and the bisected element of them, and applied the finite element modelling of three kinds of mechanical structures. The predictions and suggestions for those finite element modelling corresopnded well with experimentally varified results.