摘要
[目的]采用流固耦合计算方法虽能较好地模拟船舶碰撞过程,但计算时间较长,为此,提出一种简化的数值计算方法。[方法]以某船的局部舱段为对象,开展多工况水上碰撞试验。采用力传感器和基于高速摄影技术非接触测量的方法获得到碰撞力及碰撞船的运动时程数据,通过对碰撞接触力和加速度响应等数据进行分析,并针对试验过程开展任意拉格朗日-欧拉(ALE)流固耦合数值计算分析,提出将碰撞过程中水域对撞击船的影响简化为等效质量,将对被撞船的影响简化为等效阻力,以面力的形式作用于被撞船非撞击侧用以阻碍被撞船运动的简化方法,然后基于此简化方法开展不涉及水域与结构耦合过程的数值计算。[结果]结果显示,采用简化计算方法得到的各工况的碰撞力峰值与试验值间的误差均在5%以内,且该方法所需要的计算时长远小于ALE流固耦合算法。[结论]所提简化数值计算方法可为实现船舶结构碰撞响应的高效计算提供一定的参考。
[Objectives]Although the fluid-structure interaction calculation method can better simulate the ship collision process,it requires a longer calculation time.To address this problem,a simplified numerical calculation method is proposed.[Methods]The local cabin section of a ship is taken as the object to carry out water collision experiments under various operating conditions.Force sensors and non-contact measurement based on high-speed photography technology are used to obtain the collision force and motion time history data of the ship.The collision contact force and acceleration response data are then analyzed,and arbitrary Lagrange−Euler(ALE)coupled fluid-solid numerical computational analysis is carried out on the experimental process.The effect of the water on the impacting ship in the collision process is then simplified to the equivalent mass,and the effect on the impacted ship is simplified to the equivalent resistance,which acts on the non-impacting side of the impacted ship in the form of surface force to hinder the movement of the impacted ship.Numerical calculations that do not involve the water-structure coupling process are then carried out on the basis of the simplified method.[Results]The results show that the errors between the peak collision force and the experimental values for each condition obtained by the simplified calculation method are within 5%,and the calculation time required by this method is much smaller than that of the ALE fluidstructure interaction algorithm[Conclusions]The proposed simplified numerical calculation method can provide useful references for realizing the efficient calculation of ship structure collision response.
作者
卢安格
王子棠
孔祥韶
李樱
陈三桂
吴卫国
LU Ange;WANG Zitang;KONG Xiangshao;LI Ying;CHEN Sangui;WU Weiguo(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;China Ship Development and Design Center,Wuhan 430064,China;Green&Smart River-Sea-Going Ship Cruise and Yacht Research Center,Wuhan University of Technology,Wuhan 430063,China)
出处
《中国舰船研究》
CSCD
北大核心
2024年第2期128-139,共12页
Chinese Journal of Ship Research
基金
国家自然科学基金资助项目(52171318)。
关键词
模型试验
数值仿真
碰撞响应
任意拉格朗日-欧拉流固耦合
model test
numerical simulation
collision response
arbitrary Lagrange−Euler(ALE)fluidstructure interaction
