磁通量压缩发生器电枢的动力学特性仿真计算研究

为了有效地提高磁通量压缩发生器的输出性能,设计了一种柱锥形结构的磁通量压缩发生器,研究了发生器结构的动力学响应特性。采用聚类算法和文本挖掘技术对非线性动力学仿真软件LS-DYNA进行了二次开发,编制了节点随机失效和有限元网格自动分离程序,建立了一个仿真模型,实现了对发生器的动态膨胀和断裂过程的数值仿真计算。给出了发生器电枢的膨胀角、径向膨胀速度及断裂半径等重要参数的变化。计算结果表明,该模型可以较好地预测电枢发生断裂的时间和位置,且计算得到的电枢膨胀角、径向膨胀速度和断裂半径与理论计算结果较为接近。

Simulation of Dynamic Characteristics of Armature in Magnetic Flux Compression Generator

In order to improve the performance of magnetic flux compression generator,a cylinder-conical generator is designed,and the dynamic response characteristic of armature in the generator is studied.The clustering algorithm and text mining technology are used to develop secondarily LS-DYNA software.The code which makes the node failure and separates the finite element mesh is compiled,and a simulation model is established to simulate dynamic expansion and fracture process of generator.Expansion angle,radial expansion velocity and fracture radius of armature are presented.The calculated results show that the proposed model can be used to predict the expansion and fracture process of armature,and the simulated expansion angle,radial expansion velocity and fracture radius of armature are close to the theoretical values.The method can be used for the design of the magnetic flux compression generator,optimizing the structure of generator and improving its output performance.