某型舰船设备大负载复合材料支承冲击强度试验方法研究

Research on Experimental Method for Impact Strength of Large Load FRP Supporting Element of a Shipboard Equipment

舰船设备支承件的冲击特性研究受到各国海军的重视,然而超过常规冲击机能力范围的冲击载荷等要求,使得开展大负载支承件冲击强度试验成为难题。以某型动力设备的大负载复合材料支承为对象,采用水下非接触爆炸的方式,以标准浮动冲击平台冲击环境为输入参数设计其冲击强度试验方法:在低速冲击条件下,通过保证冲击载荷、降低试验负载质量、提高系统安装频率的途径来设计试验装置,依据冲击谱和冲击载荷计算对应的试验冲击因子来设计强度试验工况,并得出了实际试验与设计参数之间因试验系统多个结合面对冲击载荷传递影响的折减系数。试验结果表明,复合材料支承承受的冲击载荷与要求值之间的偏差在5%以内,为今后开展类似试验提供了参考。

The navies of all countries have been attached to the research on the shock characteristics of shipboard equipment s supporting element.However,the implementation of the impact strength tests for large load supporting element become a problem because of the load requirement going beyond the capacity of the test devices.The test methods for the impact strength of large load FRP support element of a power equipment are presented based on the non-contact underwater explosion and the shock environmental parameters of standard floating shock platform(FSP).The test devices are designed by means of ensuring the shock load,reducing the test load mass and improving the system installatrion frequency under the low speed impact condition.The test conditions are designed by means of calculating the shock factors based on the shock spectrum and the shock load requirement.Furthermore,the reduction factor between the actual test and the design factors is obtained from the influence of the several joint surfaces in the testing system on the shock load transfer.The results show that the deviation between the test load and the required load is less than 5%.The method provides a reference for the similar test in the future.