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针对当前水面舰艇相关标准中缺少临界应力规范计算方法的问题,依据经典船体梁弯曲理论和板壳稳定性理论,对船用标准的普遍适用性进行了分析,对简化计算公式的可行性进行了研究,对有限元法网格划分原则进行了探讨。结果表明:与静力平衡法相比,简化计算法和CCS法得到的纵骨架式板格欧拉应力偏于保守;而采用有限元法计算板单元欧拉应力时,使用二次积分单元比使用线性积分单元表现出更好的稳定性。该研究可为军标完善和纵骨架式板格临界应力校核提供参考。
Aiming at the current lack of calculation method of critical stress criterion in relevant standards of surface ships, the universal applicability of marine standard is analyzed according to the theory of classic hull girder bending and the stability of shell, and the feasibility of simplified calculation formula is studied , Discusses the principle of meshing of finite element method. The results show that, compared with the static balance method, the Euler stress of the longitudinal skeleton plate obtained by the simplified calculation method and the CCS method is somewhat conservative. When the Euler stress of the plate element is calculated by using the finite element method, the quadratic integral element is used. Linear integral units show better stability. This study can provide a reference for improving the military standard and checking the critical stress of longitudinally framed panels.