基于接触算法的电磁轨道发射装置的磁场-结构耦合数值分析  

Numerical Analysis of Magnetic-Structural Coupling for Electromagnetic Rail Launcher Based on Contact Algorithm

作　　者：尹冬梅[1] 栗保明[1] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,江苏南京210094

出　　处：《高压物理学报》2013年第5期757-762,共6页Chinese Journal of High Pressure Physics

基　　金：瞬态物理国家重点实验室基金(9140C3001011001)

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。Aiming at the loading problem of electromagnetic force in structural analysis for the electro- magnetic launcher and the untrue phenomenon obtained by common node method,a eontaet 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.

关 键 词：电磁发射 多点约束 接触 磁场-结构耦合 数值计算 

分 类 号：O343[理学—固体力学] TK05[理学—力学]