一种基于电磁发射的微型多脉冲序列加载霍普金森杆实验装置。

A miniature multi-pulse series loading Hopkinson bar experimental device based on an electromagnetic launch.

作者信息

Huang Wenkai, Chen Guangxin, Hu Mingbin, Liang Qichao, Yang Kangyao, Zhang Mingkai

机构信息

Center for Research on Leading Technology of Special Equipment, School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, People's Republic of China.

School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou 510006, People's Republic of China.

出版信息

Rev Sci Instrum. 2019 Feb;90(2):025110. doi: 10.1063/1.5077051.

DOI:10.1063/1.5077051

PMID:30831773

Abstract

Controlled multi-pulse loading has seldom been applied in classical split Hopkinson pressure bar (SHPB) research. Therefore, a new technique is proposed to realize a controlled multi-pulse loading SHPB experiment, and a miniature multi-pulse series reluctance coil launcher is developed. The micro-multi-pulse series reluctance coil emitter consists of two single-stage reluctance coils and two impact bars. Two loading pulses with the same amplitude are produced by driving the two impact bars to successively impact the incident bar. The distance between the impact bars controls the delay of the second pulse relative to the first one. The delay can be controlled by adjusting the distance between the impact bars and the launch speed. This precise multi-pulse loading technique is easy to implement and can be used to measure and study the dynamic response of various materials in loading SHPB experiments.

摘要

在经典的分离式霍普金森压杆（SHPB）研究中，很少应用可控多脉冲加载。因此，提出了一种新技术来实现可控多脉冲加载的SHPB实验，并开发了一种微型多脉冲串联磁阻线圈发射器。微型多脉冲串联磁阻线圈发射器由两个单级磁阻线圈和两个冲击杆组成。通过驱动两个冲击杆先后撞击入射杆，产生两个幅度相同的加载脉冲。冲击杆之间的距离控制第二个脉冲相对于第一个脉冲的延迟。该延迟可通过调整冲击杆之间的距离和发射速度来控制。这种精确的多脉冲加载技术易于实现，可用于在加载SHPB实验中测量和研究各种材料的动态响应。