基于时域分析的设备抗冲击连接件简化方法

Simplified method of shock resistant connection for shipboard equipment based on time domain analysis

[目的]螺栓、柱销作为舰载设备安装的重要连接件,在评估过程中合理简化仿真的方法可显著节约计算成本,提高计算效率。[方法]基于设备抗冲击时域计算方法,选取含有大量螺栓和柱销连接件的某船用电机作为分析对象,首先采用Bushing单元对螺栓、柱销进行模拟,得到在冲击载荷作用下不同阶段设备连接的刚度特性及设备连接的等效动力学模型。然后,对电机进行时域仿真评估,将仿真结果与浮动冲击平台的实验结果进行对比,以验证简化方法的可靠性和有效性。最后,在此基础上分析得到大型设备连接件在冲击载荷作用下的失效评估准则。[结果]结果显示,仿真和试验得到的基础载荷与设备动响应值之间的偏差小于10%,表明简化方法有效、可靠。[结论]研究所得结果可为后续仿真分析提供一定的参考。

[Objectives]As bolts and pins are important connector for installation of shipboardequipments,using properly simplified method for anti-shock evaluation can reduce the computation costand improve the simulation efficiency.[Methods]On the basis of time domain analysis on the anti-shockproperty of shipboard equipment,a marine generator with a large amount of connectors（e.g. boltss andpins） is chosen as research object. Firstly,installation simulation of connection with bolts and pins iscarried out to obtain the stiffness charcteristics in different phases of shock loading using busing unit,andequivalent dynamic model of equipment connection is attained. Then,simulation evaluation is made on themarine generator by time domain analysis,the results are compared with experimental data acquired fromfloating shock platform in order to verify the effectiveness and reliability of the simplified method. Lastly,criteria for failure evaluation of large-scale equipment connection under shock loading is attained.[Results]The deviation of obtained base loads as well as dynamic response between numerical values andexperimental data is less than 10%,and the simplified simulation method for connection evaluation processis effective and reliable.[Conclusions]The findings in this paper can provide significant references forthe evaluation of the anti-shock properties of equipment.