摘要
[目的]舰船动力系统的日用燃油柜是储存主机日常所需燃油的重要设备,其抗冲击性能对保障舰船正常运行、提高生命力与战斗力均具有重要意义。[方法]以某型舰用日用燃油柜为研究对象,基于耦合欧拉−拉格朗日(CEL)方法,建立流固耦合冲击动力学数值模型,在时域冲击载荷作用下对比分析不同充液比对柜体抗冲击性能的影响。[结果]计算结果表明,柜内部流体对其抗冲击性能的影响作用较为明显。在时域载荷冲击阶段,由于作用时间极短,柜内部的流体晃荡并不大,对柜体抗冲击性能的影响较小,但增大了柜体受冲击时的惯性力;随着充液比的增加,在垂向冲击载荷作用下柜的最大综合应力相较于不考虑内部流体时最大提高了6.37%,而在冲击载荷作用后的响应阶段,柜内部的流体在惯性载荷作用下激烈晃荡,对其结构产生了更强烈的冲击,造成被冲击部位的应力急剧上升,最高峰值可达到未考虑柜内流体影响时的最大综合应力值的1.54倍,此时对柜体抗冲击性能的影响较大。[结论]研究表明,在考虑内部含有一定量流体的情况下,对舰用设备进行抗冲击性能分析时不可忽视流体所带来的影响。
[Objectives]The fuel oil daily tank is designed to store fuel oil for routine operation of main engine,which is an major equipment in marine power system,so its impact resistance performance is of great importance for ensuring normal operation and improving the survivability and combat capability of naval ship.[Methods]To this end,a typical fuel oil daily tank is taken as the research object,a numerical model of fluid-solid coupling impact dynamics is established by means of the coupled Euler-Lagrange(CEL)method.The effects of different filling ratios on the impact resistance of the tank is compared subjected to time-domain impact loads.[Results]The results show that,the existence of internal fluid has a significant effect on the impact resistance of the tank.In the time-domain load shock phase,due to the extremely short action time,the sloshing of fluid is not significant,while the effect of the fluid on the tank is mainly an increase on the inertial forces as impacted.Under a vertical impact load,the maximum comprehensive stress of the tank increased by 6.37%with the rise of filling ratio,in comparison with the case that neglecting internal fluids.However,in the response stage after the impact loading,the internal fluid generates severe sloshing under the inertia load,and a more intense impact on the structure of the tank,causing stresses on the impacted part to rise sharply.The peak can reach maximum comprehensive stress from the impact stage of 1.54 times without considering the internal fluid,exerting a greater effect on the impact resistance of the tank.[Conclusions]The research work in this paper shows that for shipboard equipment with a certain amount of fluid inside,the effect of fluid should not be ignored in the analysis of impact resistance.
作者
潘海军
叶晓明
李本钶
黄冰阳
周建辉
周少伟
PAN Haijun;YE Xiaoming;LI Benke;HUANG Bingyang;ZHOU Jianhui;ZHOU Shaowei(School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;China Ship Development and Design Center,Wuhan 430064,China)
出处
《中国舰船研究》
CSCD
北大核心
2020年第S01期113-120,共8页
Chinese Journal of Ship Research
