摘要
鱼雷振动试验系统结构复杂,涉及螺栓连接、非线性材料、夹具等结构。试验系统传递特性优劣对振动环境条件模拟的置信度起着决定性的作用,因此,构建能够准确传递振动试验条件的试验系统是开展结构传递特性试验和仿真的基础。文中针对舱段振动试验系统,基于不同边界条件设置,开展随机载荷激励下系统的传递特性有限元仿真分析,最终确定了影响试验系统结构传递特性的因素。并得出以下结论:1)螺栓预紧力、夹具支撑间距、中间层材料属性是影响系统传递特性的主要因素;2)在一定范围内,随着螺栓预紧力增加,系统传递特性呈递增趋势,当拧紧力矩大于40 N·m时系统传递特性趋于稳定;3)长细比为2~4左右的鱼雷舱段,支撑比取50%~66.67%时系统传递特性更好;4)中间层取厚度小、摩擦系数大、阻尼比相对较大的材料时,系统共振频率更高,传递特性更好。
The transfer characteristic of the torpedo vibration test system is crucial to the confidence level of vibration environment simulation.Therefore,constructing a test system that can accurately transmit vibration test conditions is the basis for conducting test and simulation of structural transfer characteristic.In this paper,based on different boundary conditions,finite element simulation analysis of transfer characteristic of system under random load excitation is carried out for the cabin vibration test system,and the factors influencing structural transfer characteristic of the test system are determined.Conclusions are drawn as follows:1)bolt preload,clamp support spacing,and intermediate layer material’s properties are the main factors affecting the transfer characteristic of the system;2)within a certain range,as the bolt preload increases,the transfer characteristic of the system tends to increase,but when the tightening torque is greater than 40 N·m,the transfer characteristic tends to be stable;3)the torpedo cabin with a slenderness ratio of 2 to 4 has better system transfer characteristic when the support ratio is from 50%to 66.67%;and 4)when the intermediate layer uses a material with small thickness,large friction coefficient and relatively large damping ratio,the system can achieve higher resonance frequency and better transfer characteristic.
作者
王红瑞
曹小娟
尹韶平
张志民
单志雄
WANG Hong-rui;CAO Xiao-juan;YIN Shao-ping;ZHANG Zhi-min;SHAN Zhi-xiong(The 705 Research Institute,China Shipbuilding Industry Corporation,Xi’an 710077,China)
出处
《水下无人系统学报》
北大核心
2019年第5期574-579,共6页
Journal of Unmanned Undersea Systems
关键词
鱼雷
舱段
振动试验
传递特性
影响因素
torpedo
cabin
vibration test
transfer characteristic
influencing factor
