Numerical Analysis of Magnetic-Structural Coupling for Electromagnetic Rail Launcher Based on Contact Algorithm
-
摘要: 针对电磁发射装置结构分析中的电磁力加载问题以及共节点法计算出现的一些不真实现象，提出了采用多点约束和增广拉格朗日的接触混合算法，对电磁轨道发射装置进行了二维磁场-结构耦合的数值模拟分析。仿真结果表明：导轨所受电磁斥力、最大磁通密度的变化趋势与加载电流的变化趋势相近；发射装置中各结构材料的不同匹配，对其结构动态响应有较大影响。该方法使得导轨上所加载荷更符合实际，且避免了某些结合面出现不真实的拉伸应力，是进行电磁发射装置结构分析的有效方法。Abstract: Aiming at the loading problem of electromagnetic force in structural analysis for the electromagnetic launcher and the untrue phenomenon obtained by common node method, a contact algorithm mixing multi-point constraints with augmented Lagrangian is proposed for numerical analysis of 2D magnetic-structural coupling for the electromagnetic rail launcher. Results indicate that the changing trends of the electromagnetic force on the rails and the maximum magnetic flux density are similar to that of the loading current. Material matching affects the dynamic response of the launcher greatly. This method results in loading on the rail more reasonably and avoiding the untrue tensile stress at some conjoint areas. A useful method for structural analysis of the electromagnetic launcher is provided.
-
Liu Z G, Tian F Q. Structure dynamic characteristic analysis of electromagnetic rail launcher [J]. Journal of Ship Mechanics, 2010, 14(10): 1158-1165. (in Chinese) 刘郑国, 田福庆. 电磁轨道发射装置结构动力学特性分析 [J]. 船舶力学, 2010, 14(10): 1158-1165. Tzeng J T. Structural mechanics for electromagnetic railguns [J]. IEEE Trans Magn, 2005, 41(1): 246-250. Tzeng J T, Wei S. Dynamic response of cantilevered rail guns attributed to projectile/gun interaction theory [J]. IEEE Trans Magn, 2007, 43(1): 207-213. Liu W, Li M, Bai X Z, et al. Deformation calculation of electromagnetic Launcher's rail subjected to exponential magnetic pressure [J]. Journal of Harbin Institute of Technology, 2010, 42(8): 1336-1341. (in Chinese) 刘文, 李敏, 白象忠等. 电磁炮发射轨道受指数函数磁压力的变形计算 [J]. 哈尔滨工业大学学报, 2010, 42(8): 1336-1341. Daneshjoo K, Rahimzadeh M, Ahmadi R, et al. Dynamic response and armature critical velocity studies in an electromagnetic railgun [J]. IEEE Trans Magn, 2007, 43(1): 126-131. Wu Y. A parametic study and dynamic response analysis of electromagnetic gun barrel [D]. Nanjing: Nanjing University of Science and Technology, 2009: 12-16. (in Chinese) 吴宇. 电磁炮身管的参数化研究和动态响应分析 [D]. 南京: 南京理工大学, 2009: 12-16 Wang Y, Xiao F. Principle of Electric Gun [M]. Beijing: National Defence Industry Press, 1995: 358-359. (in Chinese) 王莹, 肖峰. 电炮原理 [M]. 北京: 国防工业出版社, 1995: 358-359. -
点击查看大图
计量
- 文章访问数: 7396
- HTML全文浏览量: 439
- PDF下载量: 399
下载:
