【摘要】 为了进一步研究吸能器的机理,采用实验和数值模拟相结合的方法,对冲击载荷作用下6060T 5铝圆环列系统的动力学行为进行了研究。采用改进的SHPB实验系统并配以高速摄影设备,分别记录圆环列的入射波、透射波波形变化及变形过程。数值研究前,利用实验数据对计算模型和计算参数进行验证和标定。对工程实际中的若干工况进行了数值分析。结果表明,圆环列吸能器具有较高的吸能率,该系统通过弯曲塑性变形能来消耗冲击能量,回弹发生后整个吸能过程结束。在工程实际中,双层疏排圆环列组合方式是较好的选择。更多还原

【Abstract】 The dynamic behavior of 6060T5 aluminum ring systems subjected to impact loading was experimentally and numerically studied to confirm the energy absorption mechanism of ring systems.The experiments were conducted on a modified SHPB test system.The variations of the incident wave and the transmitted wave,as well as the deformation histories,were recorded by a high-speed camera.The calculational parameters were calibrated based on the experimental results.Results for various working conditions show that ring systems are efficient energy absorbers with the impact energy mainly dissipated by the bending plastic deformation.The energy absorption ends once spring-back occurs.The calculations show that the ring system with a double-layered sparse arrangement scheme is an excellent engineering device for energy absorption.更多还原