基于三维水弹性理论和谱分析法的多体固连结构疲劳分析

Analysis of fatigue of multi-pressure-hull fixed structure based on three-dimensional hydroelastic theory and spectral method

多耐压体结构越来越多运用在深海装备设计中,针对多个耐压体之间固连结构的研究也愈发重要。本文利用三维水弹性软件ICS-TAHFTS对深海运载平台进行频域水弹性分析,得到固连结构的应力响应,基于Miner准则,利用谱分析方法对水面状态下的固连结构进行了疲劳累计损伤计算和寿命评估。

Multi-pressure-hull structures are increasingly used in the design of deep-sea structures, and the research on the fixed structure between multiple pressure hulls is becoming more and more important. In this paper, the frequency domain hydroelastic analysis of the deep-sea carrier platform is carried out by using the Three-dimensional Hydroelastic software ICS-TAHFTS, and the stress response of the fixed structure is obtained. Based on the Miner criterion, the cumulative fatigue damage calculation and life assessment of the fixed structure under the water surface navigation state are carried out by using the spectral method.