船舶加筋板轻量化设计研究

Research on lightweight design of ship stiffened plate

加筋板作为船舶中的基本结构单元,对其进行合理地轻量化设计研究并推广到全船可有效减少钢材消耗,降低制造成本。采用有限元软件,对加筋板的力学特性和振动特性进行分析,结合拓扑优化和尺寸优化方法,开展加筋板结构轻量化与振动的协同设计。根据优化结果重新设计梯形式的加强筋结构,并对比分析新型板材特性变化情况,验证优化结果的有效性,并讨论梯形加强筋底角大小对板材特性的影响。最终在保证其适用性的前提下,实现了加筋板减重19.2%。

As a basic structural unit in a ship, the stiffened plate is rationally designed to reduce weight and promote it to the whole ship, which can effectively reduce steel consumption and reduce manufacturing costs. Therefore, the finite element software is used to analyze the mechanical and vibration characteristics of the stiffened plates under multiple working conditions. Combined with topology and size optimization method, the collaborative design of lightweight and vibration of stiffened panel structure is carried out. The stiffener structure was redesigned with a stiffener in the form of trapezoid, according to the optimization results. And the characteristics of the optimized stiffened plates are comprehensively compared and analyzed to verify the effectiveness of the optimization results.The influence of the angle of the trapezoidal stiffener on the characteristics of the plate is also analyzed in detail Finally, the weight loss of the stiffened plate was finally achieved by19.2%, while maintaining its safety performance.