【正文】 s requirements, no matter what they could to satisfy all customers requirements, so must give users a open environment that allows users according to their actual situation to the software, including userdefined unit characteristics, userdefined material constitutive (structure, hot constitutive, fluid constitutive), userdefined flow boundary conditions, a userdefined structural fracture criterion and crack propagation law, etc. 5 Conclusions Concern the development of the theory of finite element, adopt the most advanced technology, the expansion of the software, improve performance to meet customer demand, is increasing its continuous product possess the market, the survival and development of the fundamental way. References [1] LiLiMing. ANSYS finite element analysis and practical course [M]. Beijing: Tsinghua university press. 。 there can be data and graphical display list two kinds. Postprocessing module general POST1 This module of the analysis results in front can display graphics and output. For example, calculation results (such as stress) in the changes of the model can be expressed by isoline, different isoclines color represents different values (such as stress value). Shade plan with different colors represent different numerical area (such as stress range), clearly reflect the calculation results of regional distribution. Postprocessing module of response POST26 This module is used to check result in a time or process, such as node displacement and stress or counterforce. These results can draw a curve or list view. Drawing one or more on frequency or other changes of variable curve is instrumental to visual representation to the results of analysis. 4 The development trend of the finite element analysis In1965, Finite Element is the term the first time, to today39。 Development 1 The basic theory of finite element analysis The basic concept of the finite element analysis is a simple problem solving plex problems after instead. It will be considered by many solving domain finite width of small called subfields of every unit, the assumption of an appropriate approximate solution is solved, and then the domain to meet the conditions of the problem. This solution is not accurate solution, but approximate solution actual problem, because by a simple question. Because most of the practical problems, and to get the exact solution of finite element calculation precision, and can adapt to all kinds of plex shapes, thus bee effective engineering analysis method. Finite element is the actual together to say the discrete element for domain. The concept of finite element in early centuries ago has produced and used, such as using polygonal approximation round to calculate the perimeter of a circle, but as a kind of method, is was recently. Finite element method was originally called matrix method was applied to approximate the aircraft structure strength calculation, and because of its convenience, practicability and validity in mechanics and the interest of research scientists. After decades of efforts, with the rapid development of puter technology and popularization, finite element method from the structure strength analysis extends almost all of the science and technology field, bee a kind of rich and colorful, wide application and practical efficient numerical analysis method. Finite element method for solving boundary value problems with other fundamental difference between the approximate method of approximate restricted relatively small son domain. Early 1960s first put forward the concept of structural mechanics calculation fem Clough professor vividly portray it as: finite element method (fem) = Rayleigh Ritz + piecewise function. Will a function definition in simple geometric shapes, and not on unit of the whole domain consider plex boundary conditions, the finite element method is superior to other similar methods. 2 The basic steps finite element solution The first step to solving problems, and defined according to the actual problems: the approximate solution determine physical properties and geometry field. The second step, solving domain discretization: will have different approximate solution domains for limited size and shape and connected to each other at a finite element discretization domain, the ponent is called on habits work division element. Obviously the smaller units (work), the approximation degree of discrete domain, the better results, but also more accurate calculation and error will increase, so the domain is discretized finite element method is one of