一种轴径双向分离式电磁线圈驱动装置的结构响应特性

Analysis of structural response characteristics of a bidirectional separated electromagnetic coil drive device

为了避免传统一体化驱动结构在运行过程中容易出现骨架断裂失效等不稳定现象.本文根据典型一体化驱动结构在运行过程中的应力应变,结合加速实验后出现内壁裂痕的一体化驱动结构的耐压放电测试,分析确定一体化驱动结构存在的不稳定因素,初步设计了一种轴径双向分离式模块化的新型驱动结构,对新结构在运行过程中的电磁及结构响应等展开有限元仿真分析.在相同激励条件下,新型驱动结构内壁上的应力应变远小于一体化结构,同时一体化驱动结构的内壁上的最大形变约为10-2m量级,而新型驱动结构在运行过程中内壁上的最大形变降低至10^(-5)—10^(-6)m量级.结果表明新结构能够在保证推进性能的前提下,降低内壁和相间隔板的应力应变及变形程度,提高了结构的可靠性,能够为电磁线圈驱动结构的设计优化提供一定参考和借鉴.

In order to alleviate the common problems of skeleton fracture and failure in traditional propulsion systems,the insulation degradation and structural instability existing in integrated drive structures during operation are investigated in this work.By using stress-strain calculations of a typical integrated drive structure and voltage-withstanding discharge tests after acceleration experiments,key factors are identified,and it is believed that the tensile stress inside the driving structure is one of the reasons for structural instability.Owing to the electromagnetic force acting on the coil,the integrated driving structure exhibits high tensile stress and strain on the inner wall and interphase partition,accompanied by significant deformation,which is not conducive to the overall structural stability.Based on the above calculation results,a novel modular drive structure with bidirectional separation is proposed,which can realize the radial separation between the phase partition and the skeleton inner cylinder,as well as axial separation between different driving coils.Finite element simulation analysis is conducted to evaluate its acceleration performance and structural response during operation.The results indicate that under the same excitation conditions,the new driving structure greatly reduces the interaction between the coil and the inner wall during operation,so the stress-strain on the inner wall of the new driving structure is much smaller than that of the integrated structure.The maximum deformation decreases from approximately 10–2 m in the integrated structure to about 10^(-5)m to 10^(-6)m in the new design.These findings emphasize the potential of new structure to improve reliability while ensuring propulsion performance,providing valuable insights for optimizing electromagnetic coil drive structures.For this new structure,there will be plans to conduct high-pressure propulsion experiments in the future to verify its reliability.