Free Vibration and Dynamic Analysis of Beams and Plates Using Hermite Reproducing Kernel Meshfree Method

Abstract

结构的自振频率反映了其振动特性,对于结构动力分析设计至关重要。本文基于Hermite再生核无网格法和稳定子域积分方法对薄梁板等结构进行自由振动分析。Hermite再生核无网格法是在多项式再生条件的理论框架下,同时将广义节点挠度和节点转角作为节点未知量来建立梁板挠度的无网格近似,进而与伽辽金法结合形成的无网格方法。本文将稳定子域积分法引入到无网格离散方程的积分中,该方法能准确满足积分约束条件,同时避免计算形函数高阶导数。分析表明,与仅将节点挠度参数作为未知量的传统再生核无网格近似相比,Hermite再生核近似具有更高的精度,并降低了核函数最小影响域的要求。梁板自由振动典型算例频率结果表明,与采用...Free vibration analysis of natural frequencies and vibration modes is of great importance and practical interests for the structural dynamic analysis and design. A Hermite reproducing kernel (HRK) Galerkin meshfree formulation is presented for free vibration analysis of thin beams and plates. In the HRK approximation the deflection is approximated by the deflection as well as slope nodal variables...学位:工学硕士院系专业:建筑与土木工程学院土木工程系_工程力学学号:2532007115220

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