论文部分内容阅读
如前所述,液压CAD 除计算机绘图外,还包括用计算机辅助进行计算和分析。七十年代以来,液压系统和元件的设计方法已经发生了巨大的变革,现代控制理论,优化技术、有限元方法和可靠性原理等的广泛渗透,使液压设计逐步从传统的经验计算、稳态分析和类比设计走向现代化的精密计算、动态分析和优化设计。其中,有限元方法是用计算机分析液压元件和其它机械或结构的应力、变形和流场(压力、流速)等的有力工具。利用这种方法,设计者就可以在产品实际建造之前精确评价它的机械性能,以便进行适时的改进,而无需经历大量的样机试验。本篇简要说明有限元方法的基本原理及其在液压流场分析中的应用。
As mentioned earlier, hydraulic CAD in addition to computer graphics, but also includes computer-aided calculation and analysis. Since the 1970s, the design methods of hydraulic systems and components have undergone tremendous changes. The extensive penetration of modern control theory, optimization techniques, finite element methods and reliability principles has led to the gradual transition from traditional empirical calculations to steady-state Analysis and analog design to the modern precision calculation, dynamic analysis and optimization of design. Among them, the finite element method is to use computer analysis of hydraulic components and other mechanical or structural stress, deformation and flow field (pressure, velocity) and other powerful tools. With this approach, a designer can accurately evaluate the mechanical properties of a product before it is actually built for timely improvements without having to go through a large number of prototype tests. This article briefly describes the basic principles of finite element method and its application in hydraulic flow field analysis.