磁驱动冲击与斜波复合加载实验技术及数据处理方法研究

Combining the characteristics of shock compression and ramp wave compression, to realize a new thermodynamic path controllable impact-ramp loading experimental technique for material properties investigating off-principle and in wide pressure and temperature range, can provide a new way to study on the thermodynamic path dependent behaviors of materials such as high temperature and high pressure EOS modification and phase transition mechanism research etc.. Based on the magnetically driven experimental device, the project intends to establish a new thermodynamic path controllable impact-ramp loading experimental technique. By the output pulse adjustment and the load regional structure design and optimization, a quasi-isentropic compression loading method is changed to the shock-isentropic compression loading method in which the shock amplitude could be controlled. The iterative Lagrange analysis (ILA) data processing method will be established and improved to realize experimental data processing even when the problems of weak shock wave and impedance mismatch between the samples and windows, which can enhance the understanding of the law of propagation wave under complex thermodynamic path loading and expand the research ability of material properties in wide pressure and temperature range.

结合冲击压缩和斜波压缩加载技术的特点，实现可控的冲击-斜波热力学路径动态加载，探索偏离基本参考线的宽广热力学空间内材料的动力学行为，可为目前材料高温高压状态方程的修正、材料相变机制研究等过程相关的材料的热力学行为研究提供新的研究途径。. 项目基于磁驱动实验装置，建立热力学路径可控的冲击-斜波压缩动力学加载实验技术，通过脉冲输出功率的调整以及基于材料动力学特性的负载区域结构设计与优化，实现将单一的准等熵压缩加载方式提升为冲击幅值可控的冲击-准等熵压缩加载。建立和完善基于迭代拉格朗日分析（Iterative Lagrangian Analysis）的数据处理方法，实现被测样品与窗口阻抗失配、弱冲击等问题的数据处理。提升对复杂热力学路径加载下材料中波传播规律的深入理解，拓展宽广压力和温度区间材料物性的研究能力。