四边简支单向加筋矩形板的振动特性分析

ANALYSIS OF VIBRATION CHARACTERISTIC FOR SIMPLY SUPPORTED RECTANGULAR PLATE STIFFENED IN SINGLE DIRECTION

将不同经验公式计算构件固有频率的结果与有限元方法和动态刚度阵法计算结果进行了比较,找出最为有效的经验公式,并对其不足之处进行修正,提高计算精度,为设计人员提供一个有效工具。

The simply supported rectangular plate stiffened in single direction is a typical structure for both ship decks and trunk bulkheads. In order to avoid the resonance, it is very important to predict the natural frequency of these structures, empirical formulas are very effective and simple to predict the natural frequencies in the design process. In this paper, the natural frequencies of simply supported rectangular plate stiffened in single direction are calculated by using different empirical formulas, and the results are compared with those of dynamic stiffness matrix method and finite element method respectively. Through comparing the computational results of different models, the most effective empirical formula is picked out, and then the disadvantage existed in the formula is improved. The revised empirical formula provides a useful tool for ship designers.