摘要
针对船体直翼桨区域的结构疲劳问题,基于应力叠加原理,探讨激振载荷和波浪载荷联合作用下的结构响应时域计算流程。在此基础上,提出了该区域的结构疲劳时域分析方法。通过对某船进行疲劳损伤计算,分析了激振载荷和波浪载荷对疲劳寿命的影响。结果表明,2种载荷对直翼桨区域结构疲劳损伤占比较大,其中在靠近船体中线面附近,波浪载荷对结构疲劳影响占主导地位,而主机诱导的激振载荷在基座盘面附近影响突出,达到疲劳总损伤值的50%,共振疲劳问题不容忽视。本文研究可以为船体直翼桨区域结构的疲劳设计提供参考。
Aiming at the structural fatigue problem in the region of cycloidal propeller,the calculation process of structural response in time domain under the vibration load and wave load was discussed based on the stress superposition.Furthermore,a fatigue analysis approach based on time domain was proposed.By a fatigue damage analysis for a ship,the influence of the loads on the fatigue life was compared.The results show that the both loads account for a large proportion of the structural fatigue damage.The influence of wave load on structural fatigue is dominant near the center longitudinal plane,and the influence of vibration load induced by the main engine on the base plate is prominent,reaching 50% of the total fatigue damage value,and the resonance fatigue problem cannot be ignored.The research provides a reference for the structural fatigue design of ship’s cycloidal propeller region.
作者
王伟
郭建捷
徐志亭
李聪
WANG Wei;GUO Jian-jie;XU Zhi-ting;LI Cong(Marine Design and Research Institute of China,Shanghai 200011,China)
出处
《舰船科学技术》
北大核心
2022年第6期34-39,共6页
Ship Science and Technology
关键词
疲劳分析
直翼桨
激振载荷
时域分析
fatigue analysis
cycloidal propeller
vibration load
time domain
