For a robust design of vacuum vessel of HL-2M, the electromagnetic （EM） loads have to be understood clearly. In this paper, some crucial transient events, such as plasma major disruptions （MDs）, vertical displacem...For a robust design of vacuum vessel of HL-2M, the electromagnetic （EM） loads have to be understood clearly. In this paper, some crucial transient events, such as plasma major disruptions （MDs）, vertical displacement events （VDEs）, fast discharge of toroidal field （TF） coils, have been investigated to evaluate the eddy currents and EM forces on vacuum vessel and in-vessel components. The results show that the eddy currents depend strongly on the current decay time, and the maximum toroidal eddy current flowing in the whole vessel can reach up to 2.4 MA during MDs that is close to the plasma current. Large symmetric radial forces and a net vertical force on vessel shells could be caused by these transient events. Combination of eddy currents in in-vessel components and toroidal field could twist the copper plates and other internal parts, however, if these plates are supported and connected carefully, the twist moments will not have a big effect on the vessel shells and vessel support.展开更多
Analysis of the electromagneto-mechanical coupling effect contributes greatly to the high accuracy estimation of the EM load of many EM devices, such as a tokamak structure during plasma disruption. This paper present...Analysis of the electromagneto-mechanical coupling effect contributes greatly to the high accuracy estimation of the EM load of many EM devices, such as a tokamak structure during plasma disruption. This paper presents a method for the numerical analysis of the electromagnetomechanical coupling effect on the basis of Maxwell＇s equations in the Lagrangian description and staggered load transfer scheme, which can treat the coupled behaviors of magnetic damping and magnetic stiffness effects at the same time. Codes were developed based on the ANSYS development platform and were applied to solve two typical numerical examples： the TEAM Problem 16 and dynamic behavior analysis of a shallow arch under electromagnetic force. The good consistency of numerical results and experimental data demonstrates the validity and accuracy of the proposed method and the related numerical codes.展开更多
The structural design of equatorial diagnostic port plug for international thermonuclear experimental reactor （ITER） was discussed in this paper. The induced electromagnetic （EM） loads of port plug and blanket shi...The structural design of equatorial diagnostic port plug for international thermonuclear experimental reactor （ITER） was discussed in this paper. The induced electromagnetic （EM） loads of port plug and blanket shielding module （BSM） were presented. The finite element analysis （FEA） and numerical calculation of the system were performed under the maximum loads. According to the American Society of Mechanical Engineers （ASME） criteria, the EM stress is far below the admissible failure boundary, which indicates that the system can resist the cooperative action of EM loads and device deadweight. The analysis could provide technical data and references for further analysis and optimized design of the system.展开更多
文摘For a robust design of vacuum vessel of HL-2M, the electromagnetic （EM） loads have to be understood clearly. In this paper, some crucial transient events, such as plasma major disruptions （MDs）, vertical displacement events （VDEs）, fast discharge of toroidal field （TF） coils, have been investigated to evaluate the eddy currents and EM forces on vacuum vessel and in-vessel components. The results show that the eddy currents depend strongly on the current decay time, and the maximum toroidal eddy current flowing in the whole vessel can reach up to 2.4 MA during MDs that is close to the plasma current. Large symmetric radial forces and a net vertical force on vessel shells could be caused by these transient events. Combination of eddy currents in in-vessel components and toroidal field could twist the copper plates and other internal parts, however, if these plates are supported and connected carefully, the twist moments will not have a big effect on the vessel shells and vessel support.
基金supported by National Magnetic Confinement Fusion Program of China(No.2013GB113005)the National Natural Science Foundation of China(Nos.51277139,11321062)the National 973 Program of China(No.2011CB610303)
文摘Analysis of the electromagneto-mechanical coupling effect contributes greatly to the high accuracy estimation of the EM load of many EM devices, such as a tokamak structure during plasma disruption. This paper presents a method for the numerical analysis of the electromagnetomechanical coupling effect on the basis of Maxwell＇s equations in the Lagrangian description and staggered load transfer scheme, which can treat the coupled behaviors of magnetic damping and magnetic stiffness effects at the same time. Codes were developed based on the ANSYS development platform and were applied to solve two typical numerical examples： the TEAM Problem 16 and dynamic behavior analysis of a shallow arch under electromagnetic force. The good consistency of numerical results and experimental data demonstrates the validity and accuracy of the proposed method and the related numerical codes.
文摘The structural design of equatorial diagnostic port plug for international thermonuclear experimental reactor （ITER） was discussed in this paper. The induced electromagnetic （EM） loads of port plug and blanket shielding module （BSM） were presented. The finite element analysis （FEA） and numerical calculation of the system were performed under the maximum loads. According to the American Society of Mechanical Engineers （ASME） criteria, the EM stress is far below the admissible failure boundary, which indicates that the system can resist the cooperative action of EM loads and device deadweight. The analysis could provide technical data and references for further analysis and optimized design of the system.
