| Forklift is a kind of derrick transport machine, it was developed in the 70抯, and it has been adopted more and more popular in China. Compared with the cars, the working conditions for the forklift and made it useless in a short time. At present, because of the limitation of the designs (e.g. the components is designed so independent that after assembling, some components would deform), it is hard to choose the components exactly for the right size and structure. It might cause some parts weak in strength; on another hand, some parts are usually made heavy, a waste of materials. And they were damage time, and again. Serious effect is caused on the design and development of the product and great loss would be brought to economy development. Bogie ( steering-bridge ), the main component of the forklift, is affected by many kinds of loads, easily making component deformation, causing some of them to be deformed and 83 useless sharply, thus the working life of the forklift is shortened. To fortify the strength of the forklift, the components have to be optimization design and analyzed, on the other hand, the market competition becomes more and more intensive with every passing day, the renewing cycle of the forklift becomes shorter and shorter, so it requires a quicker development speed. Form this point, traditional design methods and research step can hardly be compatible with the development. Why we do not use the famous software in the world is that we should practice economy; secondly, though the use of famous software is very convenient, it is necessary to make models respectively. We are in urgent need of a universal system for forklift strength-analysis. The Finite Element Method (FEM) is to separate the region into several unite and net grills, the function with either full-content or part-content boundary is used to the control-equation. FEM, as a numerical method, has a wide value in application. FEM can be used to solve general and 84 continuous structure problems, it is an effective way suitable to solve project key problems through a computer. FEM may combine the macroscopic way, thoroughly analyses the inner stress of every point of the component, the state of deformation. Through computer analysis, many schemes can be made to solve the strength problem so that the reliability of the forklift can be improved. When the component FEM system is used for general design, it may pre-evaluate the design scheme. Analyzing programs programed with applied computer techniques are employed to analyze and calculate the target components before designing and developing products, selection of suitable materials, rational position of suitable size, circular angle and oil hole, rational analysis of the state of stress; internal stress cure of every point of the component, the mode of deformation, precaution of the form of damage, reliable improvement. Because, it can be used to further analysis of the forklift and it is composed of pre-possessing technique,development of finite element and 85 post-possessing technique. Features of the system: 1) Datum table, parameter f...
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