综合电力系统中整流装置抗冲击特性分析

Analysis of impact resistance characteristics of rectifying device in integrated power system

[目的]综合电力系统是舰船动力推进的发展方向,整流装置是其中的重要组成部分,其抗冲击特性将直接影响综合电力系统的运行状态。[方法]通过建立带隔振器的电气类某机柜有限元计算模型,比较弹性安装与刚性安装方式下的设备冲击响应。专门设计某型刚性安装的整流装置,并在其通电状态下利用液压双波冲击机开展冲击试验。[结果]仿真结果表明,刚性安装方式下设备结构的最大应力响应接近355 MPa,有可能出现轻微塑性变形,但不至于损坏,而弹性安装方式下同样部位的应力则远超屈服极限。试验结果表明,空气开关的极限载荷为冲击谱速度小于3.2 m/s,其他部件在冲击谱速度为4.8 m/s时可正常工作。[结论]电气和电子元器件的抗冲击能力较高,通过焊接或螺钉连接的元器件均未出现脱离,而卡扣式固定的元器件和空气开关等带机械动作结构的元器件则是整流装置的抗冲击薄弱环节。

[Objectives]Integrated power systems represent the current direction in ship power development,the rectifying device is an important part of the system,and its impact resistance will direcily affect its operation performance.[Methods]The finite element model of a certain electrical cabinet with nonlinear vibration isolation parameters is established,and the impact responses of the cabinet under elastic and rigid installation conditions are contrasted.A type of rectifier is specially designed for the rigid installation and a hydraulic double wave shock machine is used to carry out the impact test in an electrified state.[Results]The simulation results show that the maximum stress response of the equipment under rigid installation is close to 355 MPa;slight plastic deformation may occur but not cause damage,while the same part of the elastic installation far exceeds the stress yield limit.The hydraulic double-wave impact test shows that the limit load of the air switch is less than 3.2 m/s,and the other components can work normally when the impact spectrum velocity is 4.8 m/s.[Conclusions]The findings in this paper show that the electrical and electronic components possess high impact resistance,and welded or screwed components do not become detached,while the weak links under impact conditions are generally buckle-type fixed and air switches with mechanical action components.