【作者】 张瑛华；

【导师】 刘宗德；

【作者基本信息】 华北电力大学（北京） ， 热能工程， 2003， 硕士

【摘要】 本文在对国内外各种热喷涂技术和快速凝固技术进行简要概括的基础上，总结了有关电热爆炸冲击动力学效应研究的进展。利用一维活塞运动模型和金属丝自由爆炸模型，分析了电热爆炸的动力学特性，考察比较了两种模型的差别和相应冲击波参数的变化规律。 本文利用有限元分析软件ANSYS，建立了二维数学模型，分析了电热爆炸超高速喷涂过程中的涂层／基体系统的温度场，对比了一维、二维温度场计算结果的不同之处，提出了对计算数学模型的进一步改进方法。适当简化并建立了一维数学模型，把冲击载荷假定为随时间变化的正弦函数，对电热爆炸超高速喷涂过程中的涂层／基体系统的动态响应特性进行了分析，得到了动态响应特性随时间的变化规律。 本文的结果对于了解电热爆炸的动力过程和涂层的快速凝固过程具有重要意义。更多还原

【Abstract】 On the base of overview on the various methods of thermal spraying and rapid solidification at home and abroad, this paper summarizes the progress of research on electro-thermal explosive impacts. While, via one-dimension piston model and freely exploding wire model, the dynamic characteristics of ultro-high velocity spraying by electro-thermal explosive method are analysed, the differences of the two models and the disciplines of the shock wave parameter are also compared and studied.Using FEA software ANSYS, this paper analyses the temperature field of coating/base system during the electro-thermal explosive impacts of ultro-high velocity spraying, in which the two-dimension mathematical model is simplized and established properly, the calculation results of one-dimension and two-dimension temperature fields are compared and the further improved methods of the mathematical model are presented. Also, the dynamic characteristics of coating/base system during the ultro-high spraying by electro-thermal explosive method are analyzed, in which the one-dimension mathematical model is simplized and established properly, the Wallop is presumed a sinusoidal function with the time, and so the discipline of the dynamic characteristics is obtained.All results have important meanings to understanding the dynamic process of electro-thermal explosive and rapid solidification process of coating.更多还原