一类广义索末菲积分的解析表达式
Analytical Formula of Some Generalized Sommerfeld Integrals
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摘要: 对均匀无限大平板导体涡流场并矢格林函数中含有的一类广义索末菲积分(GSI),导出了解析表达式,这些表达式均可表示为某个级数形式,级数中的每一项都能够用具有显式解析式的两个基本GSI及其导数表示。这些级数在导体板厚度大于透入深度的情况下收敛很快。Abstract: Analytical formulas of a type of Generalized Sommerfeld Integrals (GSI), which are included in the dyadic Green's function for an infinite uniform conducting plate in eddy current nondestructive testing problems, are derived. The derived analytic formulas are expressed in the form of series whose terms are the derivatives of two basic GSI. When the plate thickness is greater than the skin depth the series converges quickly.