船舶钢-复合材料组合基座减振设计方法分析

以有/无阻振质量组合结构基座与钢结构基座设计为例，选择振级落差作为减振评价指标，以结构重量为目标函数，考虑振级落差和应力等约束条件进行动力学优化设计比较分析.建立了相应结构动力学优化数学模型，并采用Kriging代理模型和遗传算法进行求解.结果表明：组合基座比钢基座具有更好的隔振效果；复合材料的引入对减振作用最大；阻振质量在基座减振中也有一定效果；采用优化设计方法是组合基座设计的必要手段.

Study on Vibration Reduction Design of Steel-Composite Materials Hybrid Mounting for Ships

Several mountings, such as steel composite material hybrid mounting with/without vibration isolation mass and the steel mounting, were optimized considering the vibration level difference and stress constraints. And the weight of structure is chosen as the objective function. The corresponding structural dynamic optimization mathematical models were established. By introducing the Kriging surrogate programming, the models were solved by multi island genetic algorithm. The computational results show the steel composite material hybrid mounting has better effect than the conventional steel mounting in vibration reduction. The introduction of composite materials plays a key role on vibration. The effectiveness of vibration isolation mass was also demonstrated. The adoption of optimal design method is a necessary means during the design of hybrid mounting.