CATIA System Research Articles

МЕТОД ПРОЕКТУВАЛЬНОГО РОЗРАХУНКУ НА МІЦНІСТЬ ПОПЕРЕЧНОГО СТИКУ ПАНЕЛЕЙ ВІД'ЄМНОЇ ЧАСТИНИ КРИЛА ТА ЦЕНТРОПЛАНА ТРАНСПОРТНОГО ЛІТАКА

Due to the limitation in the dimensions of the structural elements of the modeled wing contour and the possibility of increasing their cross-sections in the area of the transverse joint, only on the inside, there is a need to find an effective solution for the design, mass of the joint, as well as its statical strength at the modeling stage. The article presents the method and its application using the example of a preliminary analysis of the design calculation of the design of the flange connection of the center section with the outer wing section (OWS) of a transport aircraft. The method is based on the calculation of stresses caused by the discrete transmission of forces between elements. In the calculation method, a simplified statically indeterminate joint model is obtained according to the geometric characteristics and force transmission characteristics of each node section in the flange joint structure. During the calculations, the following are determined: diagrams of the bending moment and axial forces obtained using the force method, the distribution of force loads in each section of the model for subsequent analysis of the static safety factor. The resulting calculation results are compared with the airworthiness requirements to determine whether they meet the design requirements. For components with greater static strength, or those that do not meet the requirements, it is recommended to further modify the design parameters to ensure an effective design of the center section joint with the outer wing section and subsequent re-calculation. The calculation method used has practical value as a preliminary engineering analysis.The geometric characteristics of the junction of the center section with the negative part of the wing were modeled using the CAD/CAMCAE CATIA system.

Variant design of typical aircraft parts based on CATIA technology

In order to improve the efficiency of product design, the component framework technology was studied. With the help of CATIA secondary development platform, the variant design of typical aircraft parts was realized on the basis of parametric modeling technology, the feature information was extracted quickly, and the intelligent operation was realized. By using object-oriented programming language, a variant design module integrated with CATIA system is developed to improve the design efficiency of typical aircraft parts. Taking the tie rod in the typical aircraft parts as an example, the verification of the variation design method shows that using CATIA secondary development technology and CAA programming tools, the parametric modeling of typical aircraft parts can be achieved to achieve the variation design.

Analysis of the accuracy of reconstruction of the geometry driving wheel of gear pump with application of CATIA system

Analysis of the accuracy of reconstruction of the geometry driving wheel of gear pump with application of CATIA system

WYBRANE ASPEKTY MODELOWANIA ŚLIMAKA GLOBOIDALNEGO W ŚRODOWISKU CATIA

The paper presents methods of modelling the globoid worm with rectilinear profile using CATIA system. The methods of modelling of globoid surface, among others throw extending a profile accross the screw lines of globoid (Sweep), by making the surface as multi section (Multi Section Surface) are specified. Some steps by modelling the globoid surface are automated by writing macros in the CATIA system. The accuracy of the models of globoid worms obtained by different methods is presented. The capabilities of the CATIA system by modelling are presented.

Optimization of curved roof surface design using GA

PurposeDue to the increasing complexity of curved roof surface design and the inadequate optimisation algorithms in design software, the optimisation of curved roof surface design needs to be studied further. The purpose of this paper is to develop an alternative approach to improve the efficiency and effectiveness of curved roof surface design of buildings.Design/methodology/approachTo achieve the purpose, an optimisation method/tool is developed through reviewing the application of CATIA and integrating genetic algorithm with CATIA; and the effectiveness to perform the GA‐based optimisation method is demonstrated by using a real‐life case study. Furthermore, a comparison among different optimisation algorithms currently available in the CATIA system is conducted.FindingsThrough the case study and the comparison, it is found that the GA‐based method can improve the performance of optimisation for curved roof surface design in the CATIA system; however, further research work is required for the best global optimisation result.Originality/valueThe paper proposes an optimisation method for curved roof surface design through integrating genetic algorithm with CATIA. This method improves the current method of curved roof surface design.

Research on Knowledge-based System for Typical Aircraft Composite Component Design

Considering the characteristic of composite component design, a knowledge-based system for the design of aircraft composite component is developed. The system design adopts client/application/server (C/A/S) three-layer structure. The implementation method and theory of the knowledge-based system is introduced in detail. Firstly, the system architecture of the developed knowledge-based system is presented. Then, the system framework of the case design base is also described. Case design of a composite component includes question description and solving scheme of this component. By comparing the question description and calculating the similarity of the components, new case design can be obtained from the existed case design. This knowledge-base system is integrated with CATIA software. The process of data exchange between CATIA and knowledge-base system is presented. The 3D model of composite component created in knowledge-base system can be modified by parameter driving. By implementing the proposed knowledge-based system, the design efficiency of composite component can be increased.

Application of MOKA methodology in generative model creation using CATIA

The paper presents the method of generative model creation in CATIA system. The method covers not only the very process of model creation in CATIA system but also the whole complexity of the process, beginning with knowledge identification and acquisition and finally with explanation system creation that facilitates and justifies the usage of generative model itself. The method, in one of its parts, uses MOKA methodology and in particular its informal knowledge model and knowledge representation for generative model, which is special for CATIA.

광디스크 드라이브의 종류별 구동소음 특성에 관한 연구

In this study, experimental tests for driving noise of various optical disk drives (ODD) have been performed using 1/2' microphone noise measurement system. Several new and old ODD models by different manufacturers are practically considered and compared for realistic driving conditions. Sound insulation case with absorbing material for the present experimental tests is designed and constructed using CATIA system. It is found that average data transfer rate, operating RPM, and sound noise level seem to be different for the ODD models with same denoted speed by different manufacturers. Moreover, driving sound noise level can be largely affected by both tray shape and driving speed even for the condition of the same apparent data transfer rate.

Concurrent engineering with delta files

We describe a test system in which we used a data management system and delta files to communicate engineering changes between two modeling systems: an ACIS-based solid modeling system running on a Sun Sparc workstation to create a part, and a CATIA system running on an IBM RS/6000 to design a fixture for it. The test system communicates the first version of the MBB part between the two engineers as a PDES/STEP (Product Data Exchange Standard/Standard for the Exchange of Product-Model Data) exchange file. The ACIS engineer then makes an engineering change to the part, thus creating, the second version (V2) of it, and a delta file communicates the V2 changes to the CATIA engineer. The CATIA engineer can use this delta file to highlight the changes to the part between the two versions. Although our test system/scenario is simple, it demonstrates the advantages of delta files. It also helped us identify several important issues for developing the method further. We first outline the STEP standard and how we used it to implement data exchange in our test system, then we discuss delta files and describe how we implemented them. We conclude with a discussion of the lessons learned from the test system and scenario.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

A three-dimensional human model for the IBM/CATIA system

A 3-D human model was integrated into an IBM RS/6000 CATIA system. CATIA is a highly interactive 3-D CAD/CAM system with the ability to produce solid modelling. The human model is represented by body segments, which are connected by 15 joints. The description of body segments used in the model contains solids with cylinder, cuboid, sphere, ellipsoid cylinder and cuboid prism shapes. Robotic properties are attached to the joints to enable the joint angles to be manipulated. It can be used as a preliminary tool to help designers, engineers and students to evaluate anthropometric factors in workplace and equipment design before the first completion of the design.