本文针对初始裂纹缺陷下的水下耐压壳体结构强度与稳定性失效问题。首先建立CT裂纹扩展试件的仿真模型，通过与试验结果比对验证裂纹仿真模型的有效性。随后建立无缺陷状态下的水下耐压结构有限元模型，对其强度与稳定性进行校核。在此基础上引入裂纹缺陷，建立非线性耐压结构强度与稳定性分析模型，研究不同裂纹缺陷参数对于结构强度与稳定性的影响规律，为结构裂纹扩展与寿命问题的研究提供技术支撑。
In this paper, the strength and stability of underwater structure with initial crack defect was discussed. The simulation model of CT test crack growth was established firstly, by comparing with test results to verify the validity of the simulation model. Secondly, the finite element simulation model of the structure without defects was established to analyze the strength and stability of underwater structure. On above of the research, the strength and stability analysis model of nonlinear underwater structure was established by adding crack factors, and the influence law of different crack parameters on structural strength and stability were studied, a reasonable method for crack growth and fatigue life of structure was presented in this report.
2021,43(2): 49-53 收稿日期：2020-06-03
DOI：10.3404/j.issn.1672-7649.2021.02.010
分类号：U661.43
作者简介：李木易(1984-),男,工程师,主要从事导弹总体技术研究工作
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