The invention provides a ship structure fatigue strength analysis method and system, and the method comprises the steps: calculating a host vibration load and a wave load borne by a ship structure based on ship data, feature data of the ship structure, and global sea condition data; calculating a stress response process, a spectral density function of the stress response process, spectral moments of all orders of the stress response process and a zero-crossing rate of the stress response process under the combined action of the wave load and the main engine vibration load, and calculating stress response and a stress response peak value of the ship structure under the action of the sinusoidal vibration load; and calculating the stress cycle index of the ship structure based on the stress response in combination with a fatigue life S-N curve, further calculating the fatigue damage under the action of a main engine vibration load, finally calculating the total coupling fatigue damage under a long-term sea condition, and further calculating the fatigue damage of the ship structure under the combined action of high and low frequency loads. And the accuracy and reliability of ship structure fatigue strength calculation are effectively improved.

    本发明提供了船舶结构疲劳强度分析方法及系统,先基于船舶数据、船舶结构的特征数据和全球海况数据计算出主机振动载荷及船舶结构受到的波浪载荷,再计算出波浪载荷和主机振动载荷联合作用下的应力响应过程、应力响应过程的谱密度函数、应力响应过程的各阶谱矩以及应力响应过程的跨零率,然后计算出船舶结构在正弦振动载荷作用下的应力响应和应力响应峰值,基于应力响应并结合疲劳寿命S‑N曲线计算出船舶结构的应力循环次数,进而计算出主机振动载荷作用下的疲劳损伤,最后计算出长期海况下的总耦合疲劳损伤,进而计算出船舶结构在高低频载荷联合作用下的疲劳损伤,有效提升了船舶结构疲劳强度计算的准确性和可靠性。


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    Titel :

    Ship structure fatigue strength analysis method and system


    Weitere Titelangaben:

    一种船舶结构疲劳强度分析方法及系统


    Beteiligte:
    ZHANG FUJIE (Autor:in) / FAN JIE (Autor:in) / GUO YULONG (Autor:in) / LI JIANPENG (Autor:in)

    Erscheinungsdatum :

    2024-01-05


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / G06N COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS , Rechnersysteme, basierend auf spezifischen Rechenmodellen



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