CAE application in product development

CAE (Computer Aided Engineering) analysis uses virtual analysis methods to simulate (simulation) the performance of structures (fields), predict the performance of structures (fields), optimize the design of structures (fields), and provide guidance for product development to solve practical problems. Provide engineering basis for the problem. Finite Element Analysis (FEA) is a computer-based numerical calculation analysis method. Finite element analysis is an important part of CAE. The application of CAE begins with finite element analysis. In 1965, the large-scale general finite element analysis program MSC.NASTRAN in the United States was first applied to aerospace. In 1975, the country began to hold a finite element study class. In 1980, the US finite element structural analysis program SAP5 was introduced to China, and finite element analysis began to be promoted in China, and gradually became an important tool for product development. Finite element analysis has played an important role in optimizing structural design, improving product quality, reducing test samples, shortening product development cycle, and reducing product costs, and achieved significant economic benefits.

The development of finite element analysis applications is closely related to the development of computer software and hardware. In the initial stage of finite element analysis application, the finite element analysis program has no pre- and post-processing functions. Later, the finite element analysis has pre- and post-processing, and its functions are constantly improving. In the case that the finite element analysis has no pre- and post-processing functions, the establishment of the finite element analysis model and the collation of the calculation results are all done manually. Since 1995, internationally advanced 3D computer-aided design (CAD) software (UG, PRO/E, etc.), and large-scale general finite element analysis programs (MSC.NASTRAN, ANSYS, etc.) with front and rear processing functions have been introduced. In China, designers have realized the transition from 2D mapping to 3D design. The finite element analysis personnel can conveniently use the pre-processing mesh to form the finite element model on the 3D solid geometry of the structural member, and display the calculation result after the computer solution is completed, and the visualization of the calculation result (animation display) is made. The calculation results are clear at a glance. The finite element analysis and the pre- and post-processing functions are continuously developed and improved, and more and more automated and intelligent. The accuracy of the finite element analysis calculation results is also constantly improving. In the past, computer hardware was backward and resources were limited. The finite element analysis had to use super-unit and sub-structure methods to analyze large problems. As the hardware of the computer is constantly being updated, the previous computers have been eliminated, and finite element analysis has begun to widely use new high-end microcomputers, workstations, servers or supercomputers. Nowadays, finite element analysis has rarely used super unit and substructure analysis methods, but often uses a model multi-purpose method. It is a breeze to analyze hundreds of thousands of node scale problems.

While finite element analysis is widely used, various factories and mines, universities and research institutes have also carried out C4P (CAD/CAE/CAPP/CAM/PDM) work and established Computer Integrated Manufacturing System (CIMS). Internationally advanced multi-rigid dynamics analysis software ADAMS, aerodynamic (CFD) analysis software FLUENT, LS-DYNA software for collision analysis, LMS software for vibration and noise (NVH) analysis, for system process integration and The optimized analysis software OPTIMUS is also widely used in China. Product development has transformed from experience design to computer-aided design. People have realized their dreams for many years, CAE and CAD are synchronized, CAE guides CAD, and CAE provides the basis for CAD. Now, CAE has been widely used in aerospace, electronic appliances, machinery manufacturing, materials engineering, automotive, railway, shipbuilding, hydraulic, civil engineering, medical equipment, petrochemical, nuclear, steel and metallurgy, electric power, geology, general industry, daily Everything in daily necessities, teaching and research.

2. CAE application in automotive product development

Throughout the automotive product development process, CAE analysis can provide strength, stiffness, vehicle vibration and noise (NVH), comfort (smoothness), durability, multi-rigid dynamics, collision, and occupant safety for automotive structures. As well as the performance of the powertrain (engine and gearbox), simulation (simulation) analysis, predicting the performance of the structure (field), judging the rationality of the design, and optimizing the structural design. In addition, CAE can also simulate the process of stamping, casting and forging, optimize structural design and solve product quality problems. Since the cost of improving the design of the car after mass production is significantly higher than the cost of improving the design of the car in the early stage of development, CAE's simulation analysis is mainly applied before the manufacture of process equipment, molds and prototypes, that is, from the initial stage of automotive product development. CAE conducts simulation analysis, timely discovers hidden dangers in product design, optimizes structural design, improves product quality, and enables vehicles to meet national regulations and user needs. Through the optimization analysis of CAE, relevant departments can only trial and test a better design scheme, reduce trial production costs, shorten the research and development cycle of new products, enable new products to enter the market as soon as possible, and enhance the competitiveness of enterprises. After mass production of automotive products, CAE analysis is mainly used to solve the quality problems that occur during the use of automobiles. The combination of CAE, CAD and experimental analysis has significantly improved the level of automotive product development. Although road testing and user use of vehicles are still the only effective way to evaluate vehicle performance, the ultimate goal of CAE is to completely replace vehicle testing with the analysis of virtual prototypes. Although it has not yet been realized, it is the direction of efforts.

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