应力波放大器二维数值分析

Two-Dimensional Numerical Analysis of Stress-Wave-Amplifier

Department of Modern Mechanics, University of Science and Technology of China, Hefei

摘要: 运用动态有限元方法,对应力波在锥形应力波放大器中传播特性进行了二维数值分析,对影响透射波放大系数和波形的几何因素、输入脉冲形状、脉冲升时等进行了讨论,可供应力波铆接器设计之参考.计算结果与在Hopkinson杆上实验测得值以及特征线计算值进行了比较,其与实验结果吻合程度是令人相当满意的,与一维特征线方法相比.其计算精度也得到较大改善,特别是在透射波峰值压力附近.

Abstract: Using dynamic finite element method, the propagation of stress waves in two-dimensional conically shaped stress-wave-amplifiers is analysed. The effects of geometrical factors, input-pulse shape and pulse rising time on amplifying multiplication and wave shape of transmission waves are discussed. The consistency between numerical results and experimental results based on Hopkinson bar is satisfactory. The numerical accuracy is inploved comparing with the characteristic method.

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