舰船刚性阻振质量基座振动特性优化设计

基于结构动力学优化设计理论,研究了舰船刚性阻振质量基座结构形式的设计方法。在满足基座舱段总重量限制的约束条件下,分别建立了刚性阻振质量布置及截面尺寸优化设计模型,并进行了以基座舱段耐压壳体振动加速度为目标函数的动力学优化设计。通过优化分析,得到了在给定约束条件下减振效果最佳的刚性阻振质量截面尺寸和布置。研究结果表明,刚性阻振质量基座中阻振质量高度越大,基座舱段耐压壳体平均振动加速度级就越小。通过优化设计可以找到满足要求的结构,分析得到目标函数随设计变量的变化趋势,并对此优化方法的有效性进行验证。

Optimal Design of Vibration Characteristics of Ship Pedestal with Rigid Vibration Isolation Mass

Based on the theory of structural dynamic optimization,the design method for ship pedestal with rigid vibration isolation mass was studied.Within the total weight limits of pressure hull section,two kinds of structural dynamic optimization design models were established with regard to the sectional dimensions and the layout of isolation mass respectively.The target function is average vibration acceleration of pressure hull section.The sectional dimensions and layout of the rigid vibration isolation mass with optimal vibration reduction performance were obtained.The results indicate that the greater the height of isolation mass becomes,the smaller the average vibration acceleration will be.With this model,the optimal design solution satisfied the structural requirement is found and the feasibility of design method is verified.