Green's function for random media

被引:2
|
作者
Dasgupta, G [1 ]
机构
[1] Columbia Univ, Dept Civil Engn & Engn Mech, New York, NY 10027 USA
基金
美国国家科学基金会;
关键词
stochastic boundary element; bioengineering application; Fourier transform of distribution; Mathematica;
D O I
10.1080/02533839.2000.9670558
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Random coefficients in partial differential equations and boundary conditions pose a computational challenge. The stochastic finite element formulation is involved because the Tatarski convection like terms must be captured via stochastic strain-displacement matrices. Once the stochastic Green's Function is obtained, standard packages for boundary element analysis, e.g., BEASY, can be employed. Here, for random constitutive properties, a stationary iteration scheme is demonstrated via Fourier transform of distributions. The deterministic Green's function associated with a uniform medium provides the kernel. There is no such analog for stochastic finite elements. In a current bio-engineering stress analysis program a computer algebra environment, viz. Mathematica, is used to approximate stochastic Green's Functions.
引用
收藏
页码:377 / 384
页数:8
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