水下爆炸下舰艇不同部位冲击环境数值分析
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摘要
[目的]水下爆炸下的舰艇冲击环境是舰用设备抗冲击设计和评估的基础输入。[方法]采用数值方法研究某型船在水下爆炸下不同位置的冲击环境,流固耦合作用采用二阶双重渐近法(DAA_2)。首先选取不同的阻尼比等参数,然后使用不同安装频率的弹簧振子模拟弹性设备。[结果]研究获得了典型位置处与实船相吻合的冲击谱结果,并验证了DAA_2法的准确性和可靠性。在相同冲击输入下,利用振子计算得到不同安装位置的冲击响应并转换得到冲击环境,分析得到了冲击环境在全船上的分布和衰减规律。[结论]研究结果可为舰船设备抗冲击设计提供参考。
[Objectives]The shock environment of a warship in an underwater explosion is the basic input for the design and shock resistance ability evaluation of ship equipment.[Methods]In this paper,a numerical simulation is used to analyze the shock environment in different regions of a ship,and the Second-order Doubly Asymptotic Approximation(DAA_2)is used to solve the fluid-structure interaction.First,the appropriate calculating parameters are chosen,such as damping ratio,and then a series of Single-Degree-of-Freedom(SDOF)systems are attached at various deck locations to simulate flexible equipment.[Results]The accuracy and reliability of DAA_2 is verified by the fact that the calculated shock spectrums at classic regions perfectly match the data of the ship shock trial. The shock response of the SDOF systems under the same shock input are then calculated and transformed into the shock environment.Finally, the results of shock environments in different regions are compared. [Conclusions]The conclusions of this paper can provide design reference data for the subsequent anti-shock design of equipment.
[Objectives]The shock environment of a warship in an underwater explosion is the basic input for the design and shock resistance ability evaluation of ship equipment.[Methods]In this paper,a numerical simulation is used to analyze the shock environment in different regions of a ship,and the Second-order Doubly Asymptotic Approximation(DAA_2)is used to solve the fluid-structure interaction.First,the appropriate calculating parameters are chosen,such as damping ratio,and then a series of Single-Degree-of-Freedom(SDOF)systems are attached at various deck locations to simulate flexible equipment.[Results]The accuracy and reliability of DAA_2 is verified by the fact that the calculated shock spectrums at classic regions perfectly match the data of the ship shock trial. The shock response of the SDOF systems under the same shock input are then calculated and transformed into the shock environment.Finally, the results of shock environments in different regions are compared. [Conclusions]The conclusions of this paper can provide design reference data for the subsequent anti-shock design of equipment.
引文
[1]刘建湖,潘建强,何斌.各主要海军国家设备抗冲击标准之比较[J].应用科技,2010,37(9):17-25.LIU J H,PAN J Q,HE B.Comparison of anti-shock criteria for equipment in some primary navy countries[J].Applied Science and Technology,2010,37(9):17-25(in Chinese).
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[7]钱安其,嵇春艳,王自力.水下爆炸荷载作用下水面舰船设备冲击环境预报方法研究[J].舰船科学技术,2006,28(4):43-47.QIAN A Q,JI C Y,WANG Z L.Prediction method of shock environment for equipments on water ship under water explosion[J].Ship Science and Technology,2006,28(4):43-47(in Chinese).
[8]崔杰,李烨,陈莹玉,等.舰船全船冲击环境数值预报方法研究[J].振动与冲击,2015,34(17):88-93.CUI J,LI Y,CHEN Y Y,et al.Numerical prediction methods for shock environmental of ship's entire hull[J].Journal of Vibration and Shock,2015,34(17):88-93(in Chinese).
[9]GEERS T L.Doubly asymptotic approximations for transient motions of submerged structures[J].The Journal of the Acoustical Society of America,1978,64(5):1500-1508.
[10]刘建湖.舰船非接触水下爆炸动力学的理论与应用[D].无锡:中国船舶科学研究中心,2002.LIU J H.Theory and its applications of ship dynamic responses to non-contact underwater explosions[D].Wuxi:China Ship Scientific Research Center,2002(in Chinese).
[11]汪俊,刘国振,刘建湖,等.考虑空泡及再加载效应的水下爆炸流固相互作用分析[J].兵工学报,2014,35(增刊2):157-163.WANG J,LIU G Z,LIU J H,et al.Investigation of fluid-structure interaction under underwater explosion with effect of local cavitation and reloading[J].Acta Armamentarii,2014,35(Supp 2):157-163(in Chinese).
[12]刘国振,汪俊,刘建湖,等.考虑内流场的水下爆炸下瞬态流固耦合效应研究[J].兵工学报,2015,36(增刊1):25-32.LIU G Z,WANG J,LIU J H,et al.Investigation of fluid-structure interaction with effect of internal fluid cavitation and reloading under underwater explosion[J].Acta Armamentarii,2015,36(Supp 1):25-32(in Chinese).
[13]罗泽立.带声学覆盖层结构在水下冲击波作用下动响应的流固耦合分析方法[D].北京:中国舰船研究院,2015.LUO Z L.Analytical method of fluid-structure interaction on a structure subjected to underwater explosion with acoustic tiles[D].Beijing:China Ship Research and Development Academy,2015(in Chinese).
[14]SHIN Y S,HAM I.Damping modeling strategy for naval ship system:NPS-ME-03-003[R].Monterey,CA:Naval Postgraduate School,2003.
[15]RUDOLPH J S,HENRY C P.舰船冲击分析与设计[M].周康,赵本立,李玉节,等译.哈尔滨:哈尔滨工程大学出版社,2006.
[2]KEIL A H.The response of ships to underwater explosions:BTMB-1576[R].Washington DC:David Taylor Model Basin,1961.
[3]GREENHORN J.The assessment of surface ship vulnerability to underwater attack[J].Royal Institution of Naval Architects Transactions,1989,131:1-12.
[4]吴用舒.水面舰船冲击环境理论的研究[R]//028G实艇水下爆炸试验资料汇编(下册).北京:船舶系统工程部,1982:367-382.
[5]冯麟涵.舰船系统抗冲击性能全局优化方法研究[D].哈尔滨:哈尔滨工程大学,2009.FENG L H.Research on global optimum design method for shock resistance of ship systems[D].Harbin:Harbin Engineering University,2009(in Chinese).
[6]尹群.水面舰船设备冲击环境与结构抗冲击性能研究[D].南京:南京航空航天大学,2006.YIN Q.Studies on shock environment for equipments on surface ship and anti-shock characteristics of structures[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2006(in Chinese).
[7]钱安其,嵇春艳,王自力.水下爆炸荷载作用下水面舰船设备冲击环境预报方法研究[J].舰船科学技术,2006,28(4):43-47.QIAN A Q,JI C Y,WANG Z L.Prediction method of shock environment for equipments on water ship under water explosion[J].Ship Science and Technology,2006,28(4):43-47(in Chinese).
[8]崔杰,李烨,陈莹玉,等.舰船全船冲击环境数值预报方法研究[J].振动与冲击,2015,34(17):88-93.CUI J,LI Y,CHEN Y Y,et al.Numerical prediction methods for shock environmental of ship's entire hull[J].Journal of Vibration and Shock,2015,34(17):88-93(in Chinese).
[9]GEERS T L.Doubly asymptotic approximations for transient motions of submerged structures[J].The Journal of the Acoustical Society of America,1978,64(5):1500-1508.
[10]刘建湖.舰船非接触水下爆炸动力学的理论与应用[D].无锡:中国船舶科学研究中心,2002.LIU J H.Theory and its applications of ship dynamic responses to non-contact underwater explosions[D].Wuxi:China Ship Scientific Research Center,2002(in Chinese).
[11]汪俊,刘国振,刘建湖,等.考虑空泡及再加载效应的水下爆炸流固相互作用分析[J].兵工学报,2014,35(增刊2):157-163.WANG J,LIU G Z,LIU J H,et al.Investigation of fluid-structure interaction under underwater explosion with effect of local cavitation and reloading[J].Acta Armamentarii,2014,35(Supp 2):157-163(in Chinese).
[12]刘国振,汪俊,刘建湖,等.考虑内流场的水下爆炸下瞬态流固耦合效应研究[J].兵工学报,2015,36(增刊1):25-32.LIU G Z,WANG J,LIU J H,et al.Investigation of fluid-structure interaction with effect of internal fluid cavitation and reloading under underwater explosion[J].Acta Armamentarii,2015,36(Supp 1):25-32(in Chinese).
[13]罗泽立.带声学覆盖层结构在水下冲击波作用下动响应的流固耦合分析方法[D].北京:中国舰船研究院,2015.LUO Z L.Analytical method of fluid-structure interaction on a structure subjected to underwater explosion with acoustic tiles[D].Beijing:China Ship Research and Development Academy,2015(in Chinese).
[14]SHIN Y S,HAM I.Damping modeling strategy for naval ship system:NPS-ME-03-003[R].Monterey,CA:Naval Postgraduate School,2003.
[15]RUDOLPH J S,HENRY C P.舰船冲击分析与设计[M].周康,赵本立,李玉节,等译.哈尔滨:哈尔滨工程大学出版社,2006.