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近年来,有限元方法(FEM)作为一种解决各类工程问题十分有效的分析工具,已被工程技术人员广泛接受。 有限元方法的概念由来已久。它包括把分析系统先分割成一个个独立的部分(单元),然后将一个个单元在节点处和在(形状)边界上相连接,并且分成的单元足够小,以便它们的特性在数学上能够加以预测。例如在铆接的空间桁架的结构分析中,每个单元的特性被认为是固定的,每个单元的力和位移方程在节点处发生关系。由于有了大型高速电子计算机,为解出因许多单元装入一个完整系统中而形成的诸多方程所作的努力不会遇到任何实际问题。
In recent years, the finite element method (FEM) has been widely accepted by engineering and technical personnel as a very effective analytical tool to solve various engineering problems. The concept of finite element method has a long history. It consists of dividing the analysis system into individual sections (cells) first, then connecting cells one at the node to the (shape) boundary, and dividing them into small enough cells so that their properties are mathematically Predict. For example, in the structural analysis of a riveted space truss, the characteristics of each cell are considered to be fixed, and the force and displacement equations for each cell are related at the node. Thanks to the large, high-speed electronic computers, there is no practical problem in trying to solve the many equations created by the many units packed into a complete system.