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A hierarchy of Hamiltonian systems obtained from the Lax pair of KdV hierarchy under theconstraint condition on potential u = (q, q) is. presented. The independent integrals for theseHamiltonian systems are constructed by using recursion operator and shown to be in involution.Thus this hierarchy of Hamiltonian systems is completely integrable in the sense of Liouville. andthey commute with each other. 相似文献
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§1.在数学物理及工程技术中,关于经典薄板的振动问题已经进行过大量的讨论与计算。但是有关考虑横向剪切影响的Reissner厚板的振动问题,讨论得不多。我们在某大坝的抗震计算中遇到了这类问题。 相似文献
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李翊神 《数学物理学报(B辑英文版)》1986,(4)
§1. Introduction Recently, the author has successfully used the Darboux-transformations' method for finding the solutions of some classes of nonlinear evolution equations which are associated with 2×2 eigenvalue problems. In this paper, we extend this method for finding the solutions 相似文献
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The weak Darboux transformation of the (2+1) dimensional Euler equation is used to find its exact solutions. Starting from a constant velocity field solution, a set of quite general periodic wave solutions such as the Rossby waves can be simply obtained from the weak Darboux transformation with zero spectral parameters. The constant vorticity seed solution is utilized to generate Bessel waves. 相似文献
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Zeng Yunbo 《数学年刊B辑(英文版)》1992,13(3):327-340
A hierarchy of integrable Hamiltonian systems with Neumann type constraint isobtained by restricting a hierarchy of evolution equations associated with λφ_(xx)+u_iλ~iφ=λ~mφ to aninvariant subspace of their recursion operator.The independentintegrals of motion and Hamiltonian functions for these Hamiltonian systems areconstructed by using relevant reeursion formula and are shown to be in involution.Thusthese Hamiltonian systems are completely integrable and commute with each other. 相似文献
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厚板的数学理论是建立在与薄板不同的力学假定的基础上的。本文分析了厚板与薄板之间静力学方面的关系。对于任意的简支多边形板,得到了厚板解通过薄板解的显式表达式,从而证明了:Reissner模型的厚板解与薄板解具有相同的剪力,但弯矩、转角、挠度有差别;而washizu模型的厚板解则与薄板解不仅剪力相同,连弯矩与转角亦相同,只是挠度有差别。 相似文献