The Splitting Extrapolation Method: A New Technique in by Chin-bo Liem; Tao LuМ€; Tsi-min Shih

By Chin-bo Liem; Tao LuМ€; Tsi-min Shih

A scientific and complete presentation of the consequences bearing on powerful behaviour of elastic and plastic plates with periodic or quasiperiodic constitution. one of many chapters covers the consequences about the averaging difficulties within the linear and nonlinear shell versions. A unified method of the issues studied is predicated on glossy variational and asymptotic tools, together with the equipment of variational inequalities in addition to homogenization recommendations. Duality arguments also are exploited. an important a part of the booklet bargains with difficulties very important for engineering perform. whilst attainable, the homogenization formulation are solid in closed shape expressions. The formulation provided during this demeanour are then utilized in developing regularized formulations of the basic optimization difficulties for plates and shells, because the regularization ideas are in accordance with introducing the composite areas for which microstructural houses play the function of latest layout variables

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Extra info for The Splitting Extrapolation Method: A New Technique in Numerical Solution of Multidimensional Problems

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1) and the Richardson expansion is that hi are mu­ tually independent. And so it is possible to replace the global refinement of the Richardson extrapolation by refinements in different directions in­ dependently, and reach the same order of accuracy as that of Richardson's extrapolation. Furthermore, the amount of computation and computer storage are reduced and the degree of parallelism is greatly increased. We highly recommend the following two types of splitting extrapolation refinements which are analogs of the one-parameter grid refinements Hi) and H2) in the case of multi-parameter grid.

Iii) The function (f-y(x))a (fs(x)) is homogeneous of degree (7a + 6b). (iv) The function |/ 7 (aj)| is homogeneous of degree 7. (v) The function /y (x) is homogeneous of degree (7 — \/3\). T h e o r e m 2 . 7 . 51), then there exists an asymptotic expansion m5+7 + Ds+y\nrn — m5+7 j = 1 ,. 53), and L[m, 00] = {x G Ms : m < max(z,), 0 < min(a:,)}. * * Corollary 1. The remainder R)m\fy) = 0{m~l), for I > 7 -f s. Corollary 2. 64) A y + 5 = Dy + S = 0. Corollary 3. If Q is a quadrature formula of symmetric type, then Byj = 0, if j is odd, Dy+S = 0, ify + sis odd.

1, because the order of error of the trapezoidal rule is 0(m~2) and that of the Gaussian rule is 0 ( r a ~ 5 / 2 ) . 3, because the order of error of the trapezoidal rule is 0(m~2) and that of the Gaussian rule is O(m~4 In m). , {m} = {1,2,3,6,8,12,16,24,32, • • •}, and the extrapolation is based on the modified trapezoidal rule with the origin omitted. 82). 2 shows that the efficiency of the extrapolation is obvious. When the number of points used are v — 1633, the errors in three examples are all of degree 10" 1 0 .

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