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1、 Finite element analysis system development present situation and forecast Along with modern science and technology development, the people unceasingly are making the faster transportation vehicle, the large-scale building, the greater span bridge, the high efficiency power set and the preciser mech
2、anical device. All these request engineer to be able precisely to forecast in the design stage the product and the project technical performance, needs to be static, technical parameter and so on dynamic strength to the structure as well as temperature field, flow field, electromagnetic field and tr
3、ansfusion carries on the analysis computation. For example analysis computation high-rise construction and great span bridge when earthquake receives the influence, has a look whether can have the destructive accident; The analysis calculates the nuclear reactor the temperature field, the determinat
4、ion heat transfer and the cooling system are whether reasonable; Analyzes in the new leaf blade the hydrodynamics parameter, enhances its operating efficiency. The sell may sum up as the solution physics question control partial differential equations often is not impossible. In recent years the fin
5、ite element analysis which develops in the computer technology and under the numerical analysis method support(FEA, Finite Element Analysis) the side principle for solves these complex project analysis estimation problems to provide the effective way. Our country in 95 Plan period vigorously promote
6、s the CAD technology, mechanical profession large and middle scalene terries CAD popular rate from 85 End 20% enhances that present 70%.With enterprise application of CAD, engineering and technical personnel has gradually get rid drawing board, and will join the main energy how to optimize the desig
7、n, engineering and improving the quality of products, computer-aided engineering analysis (CAE. Computer Aided Engineering) method and software will be the key technical elements . ln engineering practice, finite element analysis software and CAD system integration design standards should be a quali
8、tative leap, mainly in the following aspects : The increase design function, reduces the design cost; Reduces design and the analysis cycle period; Increase product and project reliability; Uses the optimized design, reduces the material the consumption or the cost; Discovers the latent question in
9、advance before the product facture or the project construction;Simulates each kind of experimental plan, reduces the experimental time and the funds; Carries on the machine accident to analyze, search accident cause factor. In vigorously promotes the CAD technology today, from the bicycle to the aer
10、ospace craft, all designs manufacture all will not be able to leave the finite element analysis computation, FEA obtains the more and more widespread value in the engineering design and the analysis. The next chart is the American San Francisco bay bridge earthquake responds the computation the fini
11、te element analysis model. The development direction and on significant progress international early20th century in the end of the 50s, at the beginning of the 60s has the formidable function on the investment massive manpower and the physical resource development the finite element analysis procedu
12、re. What is most famous was (NASA) entrusts US by American country Space Agency in 1965 to calculate the NASTRAN finite element analysis system which the scientific company and the Bell aerospace system company developed. This system development until now had several dozens editions, is in the prese
13、nt world the scale is biggest, the function strongest finite element analysis system. From at that time to the present, the world each place development facility and the university also developed one batch of scales smaller but to use nimble, the price is lower special-purpose or general finite elem
14、ent analysis software, mainly had German ASKA, Englands PAFEC, Frances companys the and so on SYSTUS, USS ABQUS, ADINA, ANSYS, BERSAFE, BOSOR, COSMOS, ELAS, MARC and STARDYNE product. Now on the international FEA method and the software development presents below some tendency characteristics: 1. de
15、velops from the pure structure mechanics computation to solves many physical fields question finite element analysis method most early is comes from the structure matrix analysis development, gradually promotes to the board, the shell and the entity and so on the continual body solid mechanics analy
16、sis, the practice proved this is one extremely effective numerical analysis method. Moreover the or etically also already proved, so long as uses in to be separated solution object the unit enough to be small, the obtained solution may enough approach to the precise value. Therefore the recent years finite element method has developed question the and so on hydromechanics, temperature field, electricity conduction, magnetic field, tran
