椭球形与圆柱形耐压薄壳承载特性对比研究
Comparative research on bearing characteristics of ellipsoidal and cylindrical pressure resistant thin shell
张二 1闵少松 1滑林 1刘聪 1陈国涛1
作者信息
- 1. 海军工程大学舰船与海洋学院,湖北武汉 430033
- 折叠
摘要
将水下无人潜航器耐压结构作为应用背景,为对比椭球形薄壳与圆柱形薄壳承载差异,以应力和弹性稳定性作为典型力学性能指标进行对比.基于第四强度理论,以Mises应力作为典型应力开展数值计算,同等重量下椭球薄壳应力峰值较圆柱薄壳应力峰值小4％左右.以等容积、等重量为前提,基于ISIGHT平台调用Ansys,采用NSGA Ⅱ优化算法开展椭球薄壳弹性稳定性优化,同等重量、同等有效容积下,椭球薄壳稳定性较圆柱壳提升1.78％～6％;仅要求同等容积时,椭球薄壳稳定性较圆柱壳最大提升约200％.研究成果可为超大潜深潜器耐压结构选型提供借鉴.
Abstract
Taking the pressure resistant structure of underwater unmanned vehicle as the application background,stress and elastic stability were compared with the bearing difference between ellipsoidal thin shell and cylindrical thin shell,and stress and elastic stability were compared as typical mechanical property indicators.Based on the fourth strength theory,the Mises stress was used as the typical stress to carry out numerical calculation,and the peak stress of ellipsoidal thin shell is about 4％smaller than that of cylinder under the same weight.On the premise of equal volume or weight,call start the An-sys via the ISIGHT platform.NSGA Ⅱ optimization algorithms were used to optimize the elastic stability of ellipsoid thin shell,and the stability of ellipsoid was increased by 1.78％～6％compared with that of cylinder under the same weight and the same effective volume.When the same volume is required only,the stability of ellipsoid was increased 200％compared to that of cylinder under certation condition.The research results provide reference for the selection of pressure resistant structure of ultra-large deep submersibles.
关键词
耐压薄壳/承载特性/NSGA/ⅡKey words
pressure resistant thin shell/bearing characteristics/NSGA Ⅱ引用本文复制引用
基金项目
国家自然科学基金(52201388)
湖北省自然科学基金(2021CFB259)
出版年
2024
NETL
NSTL
万方数据