脉冲整形器在SHPB试验中的理论与应用研究

发布时间：2018-01-18 04:15

本文关键词：脉冲整形器在SHPB试验中的理论与应用研究　出处：《广州大学》2015年硕士论文　论文类型：学位论文

【摘要】：分离式霍普金森压杆(SHPB)自1949年Kolsky设计完成以来,被广泛应用于各种材料(金属类、混凝土类、陶瓷类、橡胶类、复合材料等)在不同应变率下的动态力学性能研究和测量。近年以来,随着研究领域的扩展,SHPB的工作直径逐渐增大,二维效应引起的波形振荡等问题愈加显著,严重影响试验数据的处理和研究结果的精度。目前广泛采用的脉冲整形器技术可以有效地解决这一问题。然而,由于缺乏对脉冲整形器的系统研究,脉冲整形器的材料和尺寸都是通过大量的试验确定或凭个人经验选取,致使不同研究者由不同SHPB装置得到的试验数据不具有通用性和可比性,造成资源浪费,影响学术交流。本文的主要工作:在对SHPB试验装置改进的基础上,对脉冲整形器进行了理论、计算与试验的系统研究,建立了一种确定脉冲整形器尺寸的新方法,可以提高试验效率和数据处理精度,有望解决试验数据的通用性和可比性问题。
[Abstract]:Since the completion of Kolsky design in 1949, split Hopkinson compression bar has been widely used in various materials (metal, concrete, ceramic, rubber). In recent years, the working diameter of SHPB increases with the expansion of the research field. The waveform oscillation caused by two-dimensional effect is becoming more and more obvious, which seriously affects the processing of experimental data and the accuracy of the research results. The widely used pulse shaper technology can effectively solve this problem. Due to the lack of systematic research on the pulse shaping device, the material and size of the pulse shaping device are determined by a large number of experiments or selected by personal experience. As a result, the experimental data obtained by different researchers from different SHPB devices are not universal and comparable, resulting in a waste of resources. The main work of this paper is: based on the improvement of SHPB test equipment, the theory, calculation and test of pulse shaping device are studied systematically. A new method for determining the size of pulse shaper is established, which can improve the efficiency and precision of data processing, and it is expected to solve the problem of generality and comparability of test data.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB302

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