【摘要】 本文论述无单元法在结构动力计算应用中的一些关键技术问题,并对无单元法和有限元法进行了比较,特别是通过实际算例对二者的计算精度进行了比较。结果表明:无单元解的精度始终和理论解保持高度一致,而有限元解(例如ANSYS软件)对简单轴力杆件和欧拉梁在高阶振型上有一定的误差。当二者同时应用于某一实际工程时,由于可以只采用低阶振型,因而相差较小,从而证实了无单元法在结构动力计算中更加简便、精确和实用。更多还原

【Abstract】 This paper introduces the problems of critical technique in structural dynamic computation with element-free Galerkin method(EFGM),and EFGM is compared with finite element method(FEM),especially the comparison of computation precision bewteen EFGM and FEM.The result shows that the precision based on EFGM is approximate to the theoretical solution greatly all the time,but the solution based on FEM(taking ANSYS for example) exists with a certain error in higher vibration of simple pole and Euler beam.When both EFGM and FEM are applied to a practical engineering at the same time,the distinction between the two methods is smaller. It shows that EFGM applied to structural dynamic computation is more easy and convenient,more accurate and practical.更多还原