压力容器2024，Vol.41Issue(4)：22-33,12.DOI:10.3969/j.issn.1001-4837.2024.04.004
基于局部探测法的外压球壳屈曲载荷设计方法研究
Research on buckling load design method of spherical shells under external pressure based on local probing method
摘要
Abstract
Considering that the imperfection sensitivity of spherical vessels under external pressure is inevitable,the buckling design of spherical vessels has always been a topic worthy of attention.Therefore,the buckling design of imperfection sensitive spherical shell structures under external pressure based on local probing method was systematically studied.According to the detection results,three buckling load design methods were proposed,which are the energy barrier method,the maximum curvature method and the equivalent imperfection method.On the basis of considering the nonlinear effect of materials,three methods of buckling load design were introduced in detail,and the proposed design methods were compared and verified by the buckling response of spherical shells with different geometric imperfections.The results show that,compared with the current standards,the proposed methods can provide fine buckling load design results for specific spherical shell structures under the promise of considering the imperfection sensitivity.Three specific structures were used to verify the proposed methods,and the lowest experimental knockdown factors of each structure were 0.390,0.224,0.290,respectively.The maximum design knockdown factors of each structure calculated by the design methods proposed herein are 0.315,0.213,0.171 respectively,which are all lower than the experimental values,reflecting the reliability of the design methods proposed herein.关键词
外压球壳/屈曲设计/缺陷敏感性/局部探测Key words
spherical shells under external pressure/buckling design/imperfection sensitivity/local probing分类
机械制造引用本文复制引用
王庆,范海贵,侯怡航,顾文广..基于局部探测法的外压球壳屈曲载荷设计方法研究[J].压力容器,2024,41(4):22-33,12.基金项目
国家重点研发计划项目(2020YFA0714402) （2020YFA0714402）
国家自然科学基金项目(52005072) （52005072）
中央高校基本科研业务费专项资金项目(DUT22LAB604) （DUT22LAB604）
