摘要
车载空心电抗器在其运行过程中会受到列车的随机载荷和自身电磁力以及热应力的多重载荷的影响。针对空心电抗器多重载荷下的振动稳定性问题,首先建立了车载空心电抗器受列车随机载荷的三维有限元数学模型,分析了其绕组固有频率的分布特征;其次,考虑空心电抗器载流时电磁力和热应力的相互影响,构建了空心电抗器的多物理场模型,通过多物理场耦合计算将随机载荷、电磁力和热应力等多重载荷影响因素融合并进行了求解。研究结果表明:多重载荷共同作用使得空心电抗器共振频率增大,同时共振幅值也变大,其结构强度因此降低,电气性能也会下降。
The vehicle air core reactor can be influenced by the random load from the train along with the electromagnetic force and thermal stress of the reactor itself during its operation. Aiming at the vibration stability problem of air core reactor under the influence of multiple loads,firstly the 3D finite element model of air core reactor influenced by random load from the train was established to analyze the distribution characteristics of the natural frequency of winding of the reactor. Secondly considering the mutual influence of electromagnetic force and thermal stress of current-carrying air core reactor,the multi-physics model of air core reactor was built,and solved through the multi-field coupling calculation by fusing random load,electromagnetic force and thermal stress together. The research results show that the combined effect of multiple loads increases resonance frequency of the air core reactor with the resonance amplitude becoming larger. The structure strength is thus reduced,the electrical performance will drop.
出处
《机电工程》
CAS
北大核心
2018年第3期293-297,共5页
Journal of Mechanical & Electrical Engineering
关键词
空心电抗器
随机载荷
电磁力
热应力
多物理场耦合
air core reactor
random load
electromagnetic force
thermal stress
multi-physics field coupling
