Develoment of multi-body program for tracked motion with electromagnetic forces

为了模拟受电磁力支撑、引导和推动的运动物体的动力学特性，导出了解析格式。用运动坐标系和参考系定义物体的运动，分两个阶段进行计算：在前一循环第二阶段得到的各物体的给定位置下，对电磁力和电流分布进行了数值求解，并由此推导出各物体之间的作用力。电磁场的计算依赖于铁磁性物质的存在。本文研究了两个案例。一个用于所有空气芯，另一个用于电磁铁和反应板。由物体之间的机械耦合所产生的力也被考虑在内。计算了在阶段2中给定的力作用下物体的动态运动。同时，在运动的基础上重新安排帧的位置。在阶段1中提供了运动的速度矢量。将这些方案应用于EDS和EMS磁悬浮列车的动力特性分析。研究结果为其设计提供了重要的参考依据。遗留的问题是这些分析程序的结构复杂性，这使得模型中参数的微小修改变得困难。研究了应用并行推理机（PIM）解决这一问题，并证明了其可行性。

Analytical schemes are derived in order to simulate dynamic performances of moving bodies, which are supported, guided and propelled with electromagnetic forces. The motion of bodies are defined with moving frames and a reference frame, and calculated in two stges as :1. calculation of forces acting on each bobyUnder the given position of each body obtained in stage 2 of the former cycle, electromagnetic forces and current distribution are solved numerically and forces acting between bodies are derived with them. The calculation of the electromagnetic field depends upon the existence of ferromagnetic materials. Two cases are studied. One case for all air cores, another for electromagnets and reaction plates. The forces generated by mechanical coupling between bodies are also incorporated.2. Dynamic motion of bodies under forces given in stage 2 is calculated. Simultaneously the position of frames are re-arranged on the basis of motion. The velocity vectors of motion are provided to be used in stage 1.These schemes are applied to analyze dynamic behavior of EDS and EMS maglev vehicles. The results give important information on their design related to the guideway construction.A problem remained is the structural complexity of these analyzing programs, which make the minor modification of parameters in the models difficult. Application of the parallel inference machine (PIM) to solve this problem is studied and its feasibility is proven.