摘要
研究撞击力和船艏的撞深关系,取船体惯性力为船撞的等效静力荷载,对船撞刚性墙进行拟静力分析。以5 000DWT船舶作为研究对象,通过ANSYS有限元分析,得到船舶在1.0～6.0 m/s初速度范围内,与刚性墙正向撞击的撞击力-撞深曲线。根据对曲线的数据拟合,建立了船艏的分段刚度模型,并给出了船撞静刚度与动刚度之间的比例关系,为后续船桥碰撞的撞击力研究提供基础。分析结果表明,提出的船艏刚度简化模型可用于适合工程上应用的船桥碰撞质量-弹簧体系的动力分析。
The relationship between ship collision force and bow penetration was presented. Taking the inertia force as an equivalent static load,quasi-static analysis was carried out in the ship-rigid wall collision. Using the software ANSYS,the impact analysis of 5 000 DWT ship and the initial velocity from1. 0 m / s to 6. 0 m / s was carried out and the sample curves of impact force-bow indention relationship were obtained. Based on the curve fitting to the impact force-penetration curve,a piecewise stiffness model of ship bow was established. The proportional relationship between the static and dynamic stiffnesses was derived out,which formed the basis for the further research to the impact force. Numerical results showed that the present piecewise stiffness model could be used to obtain the mass-spring system in engineering application-oriented for the simplified dynamic analysis of ship-bridge collision.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2015年第5期67-72,共6页
Journal of Nanjing Tech University(Natural Science Edition)
基金
国家自然科学基金重点项目(51238003)
国家自然科学基金青年基金(51008157)
江苏省高校自然科学研究重大项目(12KJA580002)
关键词
船桥碰撞
船艏刚度
动力学分析
拟静力分析
曲线拟合
ship bridge collision
bow stiffness
dynamics analysis
quasi-static analysis
curve fitting
