设备缓冲平台在水下爆炸载荷作用下冲击响应分析

Shock Response of Buffer Platform for Equipment in Under-water Explosion

在水下爆炸舰船抗冲击试验中,缓冲平台是设备冲击防护的有效工具。为检测缓冲平台在爆炸载荷下的缓冲特性,用小型浮动冲击平台作为试验冲击载体,对缓冲平台和平台上设备的基础输入进行测量,并采用冲击谱分析方法进行处理分析,得到了缓冲平台冲击响应特性。试验分析结果表明,缓冲平台采用不同的阻尼比对平台设备冲击响应的影响较大;当设备的自身质量较大时,平台上设备响应谱会出现明显的谱跌现象;在设备抗冲击防护设计时,应当考虑设备质量及固有频率对冲击谱的影响,这样有利于减小设备抗冲击防护设计难度。

In the under-water explosion ship shock resistance test, the buffer platform is an effective tool for shock protection for the equipments. A small floating shock platform used as the test impact target, to test the buffering performance of the buffer platform under the explosion charge, with basic inputs of the buffer platform and the equipments on it being measured. The shock spectrum analysis method is used, to obtain the responses of the buffer platform. It is indicated that for the buffer platform, different damping ratios have a great influence on the platform equipment shock response; when the equipment has a large mass, the platform equipment response spectrum shows an apparent dip trend; in the equipment shock protection design, the effects of the mass of the equipment and the natural frequency on the shock spectrum should be considered, to reduce the design difficulty for the impact protection device.