新型双波冲击试验机的机理分析与动态特性研究

为模拟现场水下爆炸冲击环境,对舰载设备进行抗冲击能力考核,以满足最新抗冲击标准的要求,同时提高传统冲击试验机的最大试验载荷,文章提出一种新型的冲击试验设备-双波冲击试验机,它能够产生正负加速度脉冲对设备进行冲击试验.文章对冲击机的能量转化和能量耗散的实现机理进行了详细地介绍与分析,并建立了非线性动力学模型.仿真结果表明,该试验机能够模拟BV043/85规范要求的正负加速度脉冲和冲击响应谱,并为实际建造重型冲击试验机系统提供理论依据和设计参考.

Analysis on Mechanism and Investigation on Dynamic Behaviors of a Novel Dual-Wave Shock Test Machine

For qualifying the anti-shock performance of shipboard equipments and simulating actual underwater explosion environments, a novel dual-wave shock test machine is proposed in order to increase testing capability of shock test machines as well as meet certain shock testing specification. The machine can generate a double- pulse acceleration shock for test articles according to specification defined in BV043/85. Based on the impact theory, a nonlinear dynamic model of the hydraulically-actuated test machine is established with thorough analysis on its mechanism that involves conversion of gas potential energy and dissipation of kinetic energy. Simulation results have demonstrated that the machine can produce a double-pulse acceleration shock in the time domain or a desired shock response spectrum in the frequency domain, which sets a base for the construction of the machine.