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中文摘要：
为了更好地研究电磁膨胀环实验加载技术，利用带有电磁模块的LS-DYNA三维动力学有限元程序对电磁膨胀环加载过程进行三维数值模拟。分析了螺线圈绕法、加载电流波形、膨胀环截面尺寸和轴向位移对电磁膨胀环实验结果的影响。计算结果表明，连接带缺口螺线圈的圆圈绕线方法优于均匀过渡绕法，加载电流峰值与膨胀环径向速度峰值近似成线性关系，适当增加膨胀环截面轴向的宽度可提高膨胀环运动稳定性，双螺线圈模型可有效减小膨胀环轴向位移。
英文摘要：
A new three-dimensional I.S-DYNA program was used to simulate the electromagnetic ring expansion experiment. Some key factors were analyzed for influencing the experimental results： coil winding methods, coil sizes, loading current waveforms, expanding ring widths, and so on. The com- puted results show that the coil winding method with clearance excels the uniformly winding method. The loading current peaks are approximately linear to the radial velocity peaks of the expanding ring. The movement stability of the expanding ring can be improved by increasing the axial width of the ex- panding ring section. And the double coil model can effectively decrease the axial displacement of the expanding ring.
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