【作者】 李祝强； 廖昌荣； 付本元； 简晓春； 谢磊； 寿梦杰；

【Author】 ZHUQIANG Li;CHANGRONG Liao;BENYUAN Fu;PENG Zhang;XIAOCHUN Jian;College of Optoelectronic Engineering, Chongqing University;College of Mechanical Engineering, Chongqing University of Technology;Transportation Institute, Chongqing Jiao Tong University;

【机构】 重庆大学光电技术及系统教育部重点实验室智能结构中心； 重庆理工大学机械工程学院； 重庆交通大学交通运输学院；

【摘要】 针对径向流动模式磁流变缓冲装置在高速冲击应用环境中存在阻尼力类"正弦波峰"的问题,提出了一种基于小孔泄流的磁流变胶泥缓冲装置。利用Power-Law模型,推导出了磁流变胶泥在小孔中流速分布表达式,进一步得到了由泄流小孔分流引起的压降。通过简化结构分析模型,最终得到了阻尼力的理论计算值。为验证理论分析的合理性,设计并制作了磁流变胶泥缓冲装置样机,利用落锤冲击试验平台对其冲击特性进行了测试,结果表明在不同激励电流下的理论与实验冲击特性能较好吻合。更多还原

【Abstract】 Aiming at the problem that the radial flow mode MR devices have an undesirable "sine wave peak" under the high-speed impact conditions. In this paper, a radial flow magnetorheological gel energy absorber(MREA) with drain hole is proposed. On the basis of the Power-Law model, the expression of velocity distribution of magnetorheological gel in the drain hole is deduced, and hence, the pressure drop caused by the split hole is further obtained. By simplifying the analysis of the flow channels, a theoretical calculation method for the damping force is finally obtained. In order to verify the theoretical methodology,a MR elasticity cement buffer is fabricated and tested by the high-speed drop tower facility. It is shown that the theoretical analysis is capable of well predicting impact behavior of the proposed MREA.更多还原