膜梁组合模型的船舶总体与上层建筑耦合振动计算方法

本文提出了用膜元与集中质量的组合作为上层建筑物的力学模型,而在考虑上层建筑与船舶总体的耦合振动时主船体仍采用梁模型,从而简化了计算力学模型的形成工作。计算程序采用自动计入附连水质量和模态综合法(动态子结构法)相结合的形成,可以方便地判断上层建筑与船体梁振动之间的耦合关系。本方法可供船厂设计人员在详细设计阶段使用。本文着重论述上层建筑与船体梁耦合振动的计算方法及其在电算程序中的计算步骤。

Calculation of Coupling Vibration of Hull and Superstructure of the Plate and Beam Conbined Ship Model

This paper takes a combination of plate element and concerntrated mass as the mechanical model. Beam model is used as the main hull when coupling vibration of superstructure and hull is taken into consideration so that to simplize the caluclation of the formation of mechanical model. Both auto-counting of the mass of entrained water and model synthesis (dynamic substructure method)are adopted in the calculation program.Therefore, the coupling relation between the vibrations of superstructure and hull can be easily judged. The calculation method of the coupling vibration of superstructure and beam its computing procedure are emphatically describ ed in the paper. This method is useful to ship designers, especially at the detail design stages.