Application analysis of CAE software in manufactur

Application analysis of CAE software in manufacturing I. Introduction CAE (computer aided engineering analysis) is a software industry developed on the mathematical basis of finite element method, finite difference method, finite volume method and lattice free method. At present, the finite element method is the most widely used in China, so here we mainly introduce the application of finite element software in Altair company, which not only brings the application within the product design capacity, but also does not elaborate on other software

as a technical means rising in the middle of the 20th century, finite element technology has been rapidly developed and widely used with the rapid development of computer technology. Based on the finite element technology, a market of tens of billions has been formed in the world. The main finite element manufacturers include ABAQUS, ADINA, algor, ANSYS and MSC, and other professional analysis software based on the finite element algorithm is numerous

with the development of finite element technology, the original finite element application system in China is undergoing profound changes. As early as the early 1980s, a number of finite element technology research, development and application systems focusing on universities and research institutes have been formed in China. Sap, which was applied by yuanmingwu, a teacher of Peking University in the early days, caused extensive influence in China at that time. Under this background, domestic scholars have successively developed several sets of finite element programs, such as JIFEX of Dalian University of technology, Zirui of Zhengzhou Institute of machinery, the finite element analysis system of Beijing Institute of agricultural machinery, and FEPG of liangguoping, a teacher of the Institute of computing. Although these software have had some impact in China due to their own reasons, they have not been widely used in the business community. With the large-scale foreign commercial software entering the country in the 1990s, the second wave of finite element application has been set off. As domestic universities have a certain research and application foundation in the field of finite element technology, they have become the main force in the initial stage of application

in recent years, the concept of digital product design has gradually taken root in the hearts of the people. The technical research and application level of domestic universities has been continuously improved. The finite element technology has been recognized by the majority of enterprises. The third wave of application of finite element technology is taking shape. It is worth noting that the finite element technology no longer only stays in Colleges and universities, but more towards enterprises. At the same time, more special analysis software with convenient use and simple operation has also been widely used

II. Application status

at present, CAE software is mainly used in automotive, electronics, aerospace, civil engineering, petroleum and other industries in China, especially in the automotive industry. The types of software mainly include general pre and post-processing software, general finite element solution software and industry-specific software. The automobile industry is the main application industry of finite element software in foreign countries. It involves a wide range of professional fields, and has a long application history and high maturity

at present, the common pre-processing and post-processing software in China includes HyperMesh of Altair company, femap of EDS company and Patran of MSC company. These software are widely used in American automobile manufacturers. Due to the characteristics of finite element technology, pretreatment has become a relatively independent and very important part. Some large enterprises have adopted pre-processing and post-processing software to meet their own needs. These pre-processing and post-processing software have good interfaces and can be combined with many finite element solution software, so that users can solve problems faster and more conveniently

there are a wide variety of solution software, including ABAQUS, ADINA, algor, ANSYS, cosmos, msc/nastran, msc/marc and nei/nastran. These software have their own characteristics. In the industry, they are generally divided into linear analysis software and non-linear software. For example, ANSYS and algor have their own advantages in terms of non-linear analysis, while ABAQUS, NASTRAN, ADINA and Marc have their own characteristics in terms of non-linear analysis. Among them, ABAQUS is considered to be the best non-linear solution software

in recent years, analysis software is developing towards multi physical fields. You can feel this through the actions of some companies in the industry. For example, ANSYS company acquired CFX fluid software, strengthened cooperation with EMSS company, and continuously strengthened its multi physical field coupling function. It should be mentioned here that due to historical reasons, algor inherits the modular idea of sap and has a good application in multi physical field analysis; ADINA, which is homologous to sap, is very unique in fluid structure coupling. Since the solution of multi physical field problems is mostly based on physical equations, there are also some software with good applications in this area, such as FEMLAB developed by MathWorks on the basis of numerical calculation software MATLAB, and FEPG system for differential equations of domestic flying arrow company

in addition, the special finite element software is limited by its application field and can only be applied in their respective industry fields. For example, the magma series casting software of magma company can simulate and analyze the casting, fluidity, curing, pressure, stress, temperature and heat balance of various metal materials. The engineer can change the design according to the calculation results, adjust the position and quantity of the cap mouth, and then improve the casting quality. For another example, ProCAST of French ESI company is in competition with magma, and its software functions are similar to magma. In addition, deform system, which is widely used in forging field, has also been recognized by many domestic enterprises

in the plate forming industry, AutoForm series software is available. The unit architecture of the software is based on the form of membrane unit, so its operation speed is relatively fast in the same industry. Msc/dytran, with its unique material flow analysis, can intuitively predict the thickness, stress distribution, cracking and wrinkle formation of stamping parts. In addition, DYNAFORM from ETA company can predict the cracking, wrinkling, thinning, scratch and springback of sheet metal in the forming process, and evaluate the forming performance of sheet metal, so as to provide help for sheet metal forming process and die design. Because this kind of analysis work is closely related to mold design, the above-mentioned software pays attention to the interface with CAD software, and basically has a good interface with popular three-dimensional design software CATIA, pro/engineer and UG. The use and operation of the software are also relatively convenient

in addition, in the application of the automobile industry, it is often necessary to carry out mechanical dynamics simulation for the whole vehicle. In this field, the common software in China is msc/adams. It is widely used for dynamic simulation of vehicle handling stability and vehicle ride comfort. The tire module in Adams provides several tire models for analysis, so as to accurately establish the tire dynamic model. The car module in ADAMS is specially designed for vehicle dynamics simulation, which is very convenient to use. In addition, VPG (virtual saving ground) of ETA company in the United States is widely used in China. VPG (virtual saving ground) is a software specially applied to Automotive Engineering jointly launched by ETA, lstc and ANSYS, which is developed on ld-dana platform by ETA company after summarizing automotive analysis engineering experience for a long time. VPG is mainly applied to the key points in the current automotive product development - vehicle system fatigue, vehicle system dynamics with multi-level flexible support combined sealing structure, NVH, vehicle crash safety and occupant protection

in addition, there are some professional software in the market, such as the noise analysis software Sysnoise of LMS company, the fatigue analysis software msc/fatigue of MSC company, the fatigue of ncode company, and the thermal fatigue analysis software femft of magma company in Austria

III. application prospect

next, the author will put the software mentioned above into place in different design stages according to the general product design process, so as to help readers acquire more perceptual knowledge

1. The conceptual process level is poor. There are three aspects in the design stage

1) market research

2) technical design, including computer effect simulation and analysis simulation demonstration of various schemes

3) evaluate and prepare relevant production facilities

in this stage, a more detailed and targeted rehearsal is mainly conducted. Large enterprises can use some large-scale general non-linear CAE software to help formulate plans, such as ABAQUS, msc/nastran and msc/marc. Small and medium-sized enterprises can use algor, ANSYS, ADINA and other software to complete this part of the work

2. Detailed design stage

after the conceptual design is completed, the detailed design is followed. At this stage, drawings of various parts shall be drawn, the assembly relationship between them shall be determined, and the product performance (structural strength, stiffness, dynamic characteristics, productivity, etc.) shall be evaluated

CAE software with simple operation and convenient use is required in this stage, so as to complete the evaluation in the least time. Such software includes algor, ansys/designspace, cosmos, etc. these software have good data interface and grid automatic generation function, which are convenient and fast to use, and have low requirements for users. At the end of this phase, some nonlinear solvers can also be used for further verification

3. Prototype manufacturing stage

complete the processing and manufacturing of the test prototype according to the model or data provided by the detailed design. This stage is a production stage, so CAE software is seldom used, but some professional software, such as casting analysis software and sheet metal forming software, can be used to guide production

4. Product testing and evaluation stage

this stage mainly uses various testing and evaluation means to make a comprehensive and real evaluation on product cost, product performance, product quality and processing characteristics, so as to provide a reliable basis for design change and product production. In this stage, some software with strong nonlinear analysis function and some multi field coupling software are mainly used, such as ABAQUS, ANSYS, msc/nastran, msc/marc, etc. At this stage, some mechanical dynamics simulation software and fatigue analysis software can be used to finally evaluate the product performance after assembly

IV. application suggestions

to sum up, CAE software is very abundant in the domestic market, and enterprises need to purchase software according to their own actual situation. At the initial stage of development, due to imperfect conditions in all aspects and relatively tight funds, it is impossible to cover all aspects. All application systems should be introduced in a planned, targeted and phased manner

the introduction of software must be carried out according to the actual situation and reduce blindness. In the early stage of product development, the purpose of purchasing software is actually to solve production problems and make preliminary preparations for the subsequent design modification. In this stage, some project consulting companies can be found to cooperate in the development to reduce the initial investment

advanced analysis and design software is only a necessary means of development and design, and the most critical factor is people. All first-class enterprises have a talent team with rich practical experience, complete disciplines, challenge and creativity. Software is easy to buy, but talent is hard to find. Therefore, while introducing technology, we should pay attention to the cultivation of talents. On the one hand, we can train the team in the actual design and production through digestion and absorption. On the other hand, we can recruit talents at home and abroad. We can not only bring in experienced talents, but also send out the talents of enterprises to learn experience and technology, and increase the tilt in the employment policy

in a word, whether it is to introduce ready-made technologies or joint ventures, in the final analysis, it is necessary to learn from the advanced technological achievements of others and turn them into their own things as soon as possible. noDetails of the closing of rubber bidding transaction in Hainan trading hall on February 20
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