摘要
针对船舶与小型冰山的碰撞响应问题,综合考虑内部动力和外部动力,根据非线性有限元和冲击力学理论,依次求得船体与冰山变形所需变形能和碰撞系统的耗散能,探究舷侧在不同位置与冰山碰撞后的结构响应,分析损伤变形、碰撞力和变形能变化等特性。结果表明,碰撞力撞深曲线呈现高度非线性的特征,而且碰撞力呈波动上升;舷侧各构件中,外板以变形能的形式吸收了大部分耗散能。
A method to determine complete end state of ship-iceberg collision was proposed based on nonlinear finite element method and impact dynamics theory,considering the internal mechanics and external mechanics comprehensively. Internal energy and dissipated energy of ship-iceberg collision were obtained through internal and external mechanics respectively. When internal energy is equal to dissipated energy,a complete end state is got. The method was applied to analyze the collision between iceberg and ship side at different locations,including collision force,damage deformation of ship and iceberg and internal energy. It was concluded that curves of collision force-penetration has highly nonlinear characteristics. Besides,about half of the total strain energy dissipated in the outer plate among ship side components.
出处
《船海工程》
北大核心
2017年第4期20-24,29,共6页
Ship & Ocean Engineering
基金
国家自然科学基金项目(51261120376)
