四边刚性固定矩形板塑性设计公式

Plastic Design Formulation for Clamped Rectangular Plate

由于船体结构在轮压、冰载等作用下板厚采用塑性设计,需要求得塑性阶段解答,Lin Hong和J?rgen Amdahl提出了针对四边刚性固定,承受部分均布横向载荷矩形板的"双钻式"失效模型。为进一步提高"双钻式"模型的适用性,采用非线性有限元方法,通过变化板厚及载荷作用区域的大小等因素,对Lin Hong等人"双钻式"失效模式下的塑性设计公式进行了拟合修正,得到了适用于求解冰载荷作用下船体板结构塑性阶段载荷变形关系的计算公式,该公式可用于冰载荷下船舶舷侧板的强度校核。

Plastic design method is adopted when the structure of the ship is subjected to wheel pressure or ice load, which requires a precise solution of load-carrying capacity of patch loaded plates in plastic bending phase. Lin Hong and Jongen Amdahl proposed a ＂double-diamond＂ collapse pattern which bears part of the even horizontal load rectangular plate. In order to widen the applicability of the ＂double-diamond＂ pattern, the nonlinear finite element analysis（NLFEA） is employed. By the change of the plate thickness and the size range of the load patch, the correction coefficient to LIN＇s formulation is investigated A revision formulation is obtatined, which is applied to solve the load deformation relation at the plastic stage of the hull plate under ice load. The revison formulation can be used for the strength cheek of the ship structure subjeted to ice load.