为得到C型固体电枢的电流密度、焦耳热分布特性,在假设电枢与轨道之间是不分离接触、理想全接触的前提下,基于数值仿真分析了C型电枢的电流密度和温度场分布特性及其产生机理,并进一步探讨了电枢结构尺寸变化对电流密度特性分布规律的影响及其影响机理.得出了集肤效应与邻近效应对电枢的特性分布有重要影响.%In order to realize the Joule heat distribution characters in the process of electromagnetic launch, on the assumption of the nondisjunction and ideal complete contact between the armature and rail, the inner current field distribution and the consequently temperature field distribution characters of C -shaped armature in the launching process were analyzed based on numerical simulation. Furthermore, the effects of the changes in C-shaped armature ' s structure on the inner armature current field distribution and their working mechanism were discussed. Qua-sistatic magnetic and electric fields are applied to explain the distribution characteristic, and the results show that the skin effect and proximity effect have effects upon the distribution character of the armature. The maximum current density was decreased by the increase of the side thickness and front thickness, but the length of the armature had little effect on the maximum current density.
展开▼
