通过分析三维板架入水砰击的结构动力响应，引入等效静力系数，建立板架结构入水砰击的等效静力分析方法。系统地改变计算参数，分析了冲击速度、入水角度、网格尺寸、边界条件等因素对板架应力峰值和等效静力系数的影响，进而提出了一种评估船首外飘结构砰击强度的方法。该方法可以反映砰击载荷作用下局部板架的动态效应，又避免在单纯利用板架模型评估时，板架边界设置对应力响应峰值的影响。
Based on the analysis of the dynamic response of the three dimensional grillage during the water entry, the equivalent static coefficient (ESO) was introduced to establish the equivalent static analysis method for the calculation of the structural response of the grillage. Changing calculation parameters (impact velocity, deadrise angle, mesh size, boundary condition) of the grillage systematically, the influence of these parameters on the stress peak value and the ESO were analyzed, and then a method was proposed to assess the bow flare slamming strength. This method could not only reflect the dynamic effect of local grillage under slamming loads, but also avoid the influence of boundary conditions on the stress peak value when only the local grillage model was used to structural assessment.
2020,42(6): 20-24 收稿日期：2019-03-15
DOI：10.3404/j.issn.1672-7649.2020.06.004
分类号：U661.3
基金项目：国家自然科学基金资助项目(51709030；51679021)；中央高校基本科研业务费资助项目(3132019320)；国家重点研发计划重点专项(2016YFC0301500)
作者简介：于鹏垚(1988-),男,博士,副教授,主要从事船海装备力学问题研究
参考文献：
[1] ISSC. Impulsive pressure loading and response assessment[R]. Rostock, Germany, 2012.
[2] 于鹏垚, 任慧龙, 李陈峰, 等. 船首外飘砰击设计载荷直接计算[J]. 船舶力学, 2016, 20(5):566-573
[3] YU, P LI, H; ONG, M C. Numerical study on the water entry of curved wedges[J]. Ships and Offshore Structures, 2018, 13(8):885-898
[4] YU, P LI, H; ONG, M C. Hydroelastic analysis on water entry of a constant-velocity wedge with stiffened panels[J]. Marine Structures, 2019, 63:215-238
[5] REN H, YU P, WANG Q, et al. Dynamic Response of the bow flare structure under slamming loads[C]//Asme International Conference on Ocean. 2015.
[6] 于鹏垚, 任慧龙, 冯国庆, 等. 船首外飘砰击强度直接计算[J]. 中国造船, 2015, 56(1):61-68
[7] American Bureau of Shipping. Guide for Slamming Loads and Strength Assessment for Vessels[S]. 2011.
[8] 王辉, 顾学康, 祁恩荣, 等. 砰击载荷作用下船底肋骨等效设计压力的确定[J]. 舰船科学技术, 2010, 32(3):10-15 WANG Hui, GU Xuekang, QI Enrong, et al. The equivalent design pressure of ship frame structures under bottom slamming loads[J]. Ship Science and Technology, 2010, 32(3):10-15
[9] 于鹏垚. 船舶局部砰击载荷与结构响应计算方法研究[D]. 哈尔滨:哈尔滨工程大学, 2016.
[10] 中华人民共和国国家军用标准GJB/Z-1999, 水面舰艇结构设计计算方法[S]. 国防科学技术工业委员会1999.
[11] 骆寒冰, 董德龙, 季红叶, 等. 基于ALE算法的无转角和有转角铝制加筋板楔形体水弹性砰击的数值模拟研究[J]. 船舶力学, 2017, 21(2):175-183
[12] 陈震, 肖熙. 空气垫在平底结构入水砰击中作用的仿真分析[J]. 上海交通大学学报, 2005, 39(5):670-673
[13] 冯国庆. 船舶结构疲劳强度评估方法研究[D]. 哈尔滨, 哈尔滨工程大学, 2006.
