【作者】 王磊磊；

【导师】 刘文；

【作者基本信息】 燕山大学 ， 计算数学， 2012， 硕士

【摘要】 电磁发射装置作为一种全新的概念性武器，在军事、科研等诸多领域有着广泛的应用前景。因其具有巨大的发展潜力，所以吸引着各个国家在理论和应用上对其进行深入的研究。由于电磁发射装置是一个处在高速滑动电接触下的应力场、热场和电磁场相互耦合的复杂系统影响中，所以想要掌握整个电磁发射装置系统的物理过程，目前仍有相当大的困难。论文主要对电磁轨道炮电路暂态的基本特性、发射组件重要参数优化和电磁轨道炮发射炮管内表面受三次函数分布压力作用下的解析解进行了研究。首先，论文从电磁轨道炮的电路暂态特性出发，综合考虑欠阻尼、过阻尼和临界阻尼三种暂态过程。通过数值模拟结果分析了电感梯度、回路电感和电容三者分别对轨道炮储能电容器上的电压、放电回路电流和电枢反电动势之间的变化关系。其次，弹丸的出口速度是电磁轨道炮设计的最重要参数之一，探明轨道间距、高度、驱动电流等对弹丸发射速度的影响，从而获得弹丸的最佳速度是非常有意义的。论文在考虑了等离子体电枢运动中所受到的粘滞阻力和惰性阻力的基础上，构建了包含电枢速度、驱动电流、轨道间距和高度等在内的优化模型，并采用牛顿法进行了优化计算。优化结果表明：调整发射轨道的高度及两轨间的间距可以达到调整弹丸出口速度的目的。最后，解决电磁轨道炮发射炮管受力变形的精确计算，有利于延长炮管的使用寿命并提高发射精度。为此，论文在三维空间中构建了一个既满足双调和方程，又满足边界条件的应力函数，推导出采用等离子电枢的圆筒电磁轨道炮的炮管受三次函数分布压力作用下的解析解。在REG-III型电磁炮的发射炮管上，通过静态应变测试仪记录发射时炮管的应变值，并与理论计算的结果相比较，二者吻合程度较高。更多还原

【Abstract】 As a new concept weapon, electromagnetic emission device has a broad prospect ofapplication in the military and the scientific research fields. It is because of great potentialof development, the research of further in the theory and the application has attractedmany countries. Because the electromagnetic emission device is a high-speed slidingcontact under the stress field, thermal field and electromagnetic field coupling effect ofcomplex system influence. Presently, it is considerable difficult to master entire systemphysical processes of electromagnetic emission device system.In this paper, we mainly study the transient basic characteristics of the circuit, theoptimization of the launch components important parameters and the analytic solution ofinternal surface of launcher’s barrel subjected to three times function distributionpressures of the electromagnetic railgun.Firstly, paper considers the three transient process including owes damping, overdamping and critical damping on the basis of the electromagnetic railgun circuit’stransient characteristics. Variation relation of the railgun to the storage capacitor voltage,the discharge circuit current and the armature back electromotive force are analyzedrespectively the inductance gradient, the loop inductance and capacitance by the numericalsimulation results.Secondly, the speed of launched projectile is one of the most important parameters ofthe railgun design, in order to exploring the influence of speed of projectile launchedabout the spacing and height of the rail and drive current, so it got the optimum speed ofprojectile is meaningful. The optimization model that it will optimize calculation in usingnewton method among armature speed, drive current and the spacing and height of the railwas established in paper on the basis of the plasma armature movement by the viscousdrag and inertial drag. The optimization results showed that adjust to the height of the rail,between two rails distance to reach to purpose that it adjust launched speed of projectile.Finally, the accurate calculation of force-deformation of the electromagneticlauncher’s barrel can help to extend the barrel life and improve the firing accuracy. Therefore, a stress function which meets both the biharmonic equations and boundaryconditions is constructed in the three-dimensional space in paper. Furthermore, theanalytic solution of barrel subjected to three times function distributed variable pressurewith plasma armature is deduced. When strain values of a barrel are recorded by staticstrain tester on REG-III electromagnetic launcher’s barrel, the experimental results are inaccord with the theoretic calculation.更多还原