摘要
复合材料能够大幅减轻耐压壳结构的质量,这对增加水下航行器的有效载荷,提高其续航力具有重要意义。基于复合材料可设计性的特点,考虑了耐压壳与加强筋结合的"倒T"形区域,研究了不同铺层数量耐压壳结构的强度失效模式和极限承载压力。以环肋区域、连接区域、覆盖区域的铺层数量为设计变量,用拉丁超立方试验设计方法在设计变量空间里选取样本点并进行有限元结构分析,得到各样本点的响应。利用径向基神经网络模型建立铺层数量与临界失稳压力、Tsai-Wu失效指数和重量的关系,结合多岛遗传算法,得到了复合材料环肋耐压壳的最优设计方案。结果表明,优化后的耐压壳满足设计要求,提高了耐压壳结构强度利用率,缩短了优化时间。
The composite material can greatly reduce the weight of the pressure hull, which has the great significance for increasing the payload of the underwater vehicle and improving its endurance. The composite material has the designable characteristic, so the ‘inverted T’-stiffened area of the pressure hull combined with the ribs is considered. The ultimate buckling pressure and the structure failure mode of the pressure hull are studied as the number of the composite material layers is changed. Taking the number of layers of the ring-stiffened area, the connection area and the coverage area as design variables, the sample points are selected in the design variable space by using the Latin hypercube design of experiment and conduct finite element structure analysis in order to obtain the response of each sample point. Combined with the multi-island genetic algorithm, the optimal design scheme of the composite ring-stiffened pressure hull is obtained by establishing the relationship between the number of layers and the ultimate buckling pressure, the Tsai-Wu failure index and the weight. The results show that the optimized pressure hull can meet the design requirements, improve the utilization ratio of structure material and reduce the optimization time.
作者
杨卓懿
王亚楠
宋磊
王俊俊
YANG Zhuo-yi;WANG Ya-nan;SONG Lei;WANG Jun-jun(College of Naval Architecture and Marine Engineering,Shan Dong Jiao Tong University,Weihai 264209,China)
出处
《玻璃钢／复合材料》
CAS
北大核心
2019年第5期56-61,共6页
Fiber Reinforced Plastics/Composites
基金
山东省自然科学基金项目(ZR2017LEE030)
山东省重点研发计划(2018GGX105002)
