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发表时间：2013-01-01

发表刊物：计算力学学报

所属单位：运载工程与力学学部

期号：4

页面范围：479-484

ISSN号：1007-4708

摘要：It is the key to important medical diagnostic equipment that designing excitation structure in certain region to produce a magnetic field with adequate strength and uniformity .Based on the topology optimization method ,we propose an optimal method which can design the spatial arrangement of super-conducting excitation coil to produce a homogeneous magnetic field in magnetic resonance imaging appa-ratus .With the distribution parameters of the excitation coil in a given area as design variables ,and the mean square error of the magnetic field in the desired area as the uniformity indicator ,considering the limits of the coil’s volume and the strength of the magnetic field ,we establish a mathematical model for the uniform magnetic field design problems .Using the proposed optimization model ,we get a specific design and by the simulation of the design result ,we verify the homogeneity of the magnetic field and the effectiveness of the method .

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