共查询到10条相似文献,搜索用时 203 毫秒
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在地下抗爆结构动力计算中,结构变形速度的作用是非常突出的.考虑结构变形速度的作用,所建立的结构体系运动微分方程可以真实地描述结构振动的实际情况.文中通过一维平面波理论,导出了作用在结构周边上的荷载表达式,给出了地下曲杆结构动力分析的广义变分原理,同时还进行了数值计算结构的对比分析. 相似文献
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We suggest a formulation of the dynamical principle for mechanics in which time is not a preferred evolution parameter but
plays the role of a new generalized coordinate. The advantage of this approach is the possibility of extending it to dynamical
systems in which there is no natural evolution parameter (thermodynamics, equilibrium economics, and the like).
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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 153, No. 1, pp. 18–28, October, 2007. 相似文献
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根据古典阴阳互补和现代对偶互补的基本思想,通过罗恩早已提出的一条简单而统一的新途径,系统地建立了正交索网结构几何非线性弹性动力学的各类非传统Hamilton型变分原理.这种新的非传统Hamilton型变分原理能反映这种动力学初值-边值问题的全部特征.文中首先给出正交索网结构几何非线性动力学的广义虚功原理的表式,然后从该式出发,不仅能得到正交索网结构几何非线性动力学的虚功原理,而且通过所给出的一系列广义Legendre变换,还能系统地成对导出正交索网结构几何非线性弹性动力学的5类变量、4类变量、3类变量和2类变量非传统Hamilton型变分原理的互补泛函、以及相空间非传统Hamilton型变分原理的泛函与1类变量非传统Hamilton型变分原理势能形式的泛函.同时,通过这条新途径还能清楚地阐明这些原理的内在联系. 相似文献
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让光林 《数学物理学报(B辑英文版)》2010,30(1):257-268
Under the framework of white noise analysis,the existence of scattering solutions to the abstract dynamical Ф_4~4 wave equations in terms of generalized operators(see Section 3 below) is proven via a combination of the characterization for the symbol of generalized operators and the classical scattering results.In addition,some properties(Poincaréinvariance and irreducibility) of the solutions are discussed. 相似文献
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Z.Q. Yang Q. Zhang Z.Q. Chen 《Communications in Nonlinear Science & Numerical Simulation》2012,17(6):2628-2636
In this paper, the linear generalized synchronization between two nonidentical complex dynamical networks is investigated. Both non-delay and delay-coupled complex dynamical networks are studied. By designing effective adaptive controllers, the linear generalized synchronization between two networks with identical and nonidentical topological structures can realize. The feasibility of the proposed scheme is proved in theory and illustrative examples are presented to demonstrate the application of the theoretical results. 相似文献
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In this paper, using technics from asymptotic analysis, we show that the three-dimensional dynamical model for a non-linearly elastic shallow shell made of anisotropic material, with boundary conditions of generalized Marguerre–von Kármán’s type, reduces to two-dimensional dynamical model. 相似文献
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使用混合广义变分原理,将基于Lagrange表述的小位移变形结构振动问题与基于Euler描述的不可压缩粘性流动问题,统一在功率平衡的框架下建立流固系统的耦合控制方程.用有限元格式做空间离散后,再用广义梯形法将有限元控制方程转化为增量型的线性方程组,该方程组的系数矩阵具有非对称性,其中元素含对流效应和时间因子.将GMRES算法与振动分析的Newmark法和流动分析的Hughes预测多修正法结合,发展成一种基于GMRES-Hughes-Newmark的稳定算法,用于计算具有复杂几何边界的强耦合流激振动问题.以混流式水轮机叶道为数值算例的计算表明,模拟结果与试验实测结果吻合较好. 相似文献