CATIA CAD Research Articles

Effect of winglet cant angle on the performance of an aircraft wing

The complicated and quick Winglet tool is attached to the end of the plane's wings. It's more like a vertical or angled extension on each wing's parameters. Due to wingtip vortices, airplane wing performance is primarily low, bringing about drag. In this project, wing evaluation of the Cessna wing prototype for the NACA 2412 at Mach 0.1 is accomplished at one sort of cant angle. At this time, certain Winglet angles of 150, 350 and 550 are chosen to fill in any study gaps and provide results based on systematic research through CFD evaluation of the factors. The objective of this project is to provide a precise approach for reading in Ansys Workbench concerning the preferred Catia CAD model. At high and idle speeds, well-designed winglet reduces drag and potentially enabling the increased cruise speed. Winglets offer an incredibly inexpensive way to improve an aircraft's standard performance, especially when comparing unique solutions with engine upgrades.

Modeling and FEM Analysis of Shovel of 5-Tyne Duck Foot Cultivator

For soil preparation Cultivator is important agricultural equipment. As an important agriculture equipment for soil preparation cultivator is used in which stress are form due to contact with soil where tyne and shovel works as actual member of cultivator which is direct contact with soil. We can reduce the stress from changing the design of tine or shovel of cultivator. The main objective of this analysis is to analyze the forces developed on shovel during operation. To analyze this Shovel using FEM, firstly a proper CAD model has been developed using CATIA cad software. Then by using ANSYs software FEM analysis have been done to determine the stresses.

Elaboration of New Viewing Modes in CATIA CAD for Lighting Simulation Purpose

During integration of lighting simulation systems into CATIA CAD often are needed additional view modes initially absent in this CAD. This article describes adding such view modes directly in CATIA workspace window using CATIA’s native CAA RADE programming environment. Adding these new view modes can significantly simplify user’s preparation of data for lighting simulation. Here the following additional view modes are mentioned: geometry tessellation to triangular meshes (in the wireframe mode), heat map dis-play of the optical values distribution over the scene, and spherical panorama preview. In the paper the problems which may occur while trying to redraw the additional data in real time are described and possible ways of solving or by-passing them are proposed. Using the new display modes provides a possibility of tuning some scene parameters and viewing preliminary results immediately while rendering of such scenes may take several hours. Such additional functionality can significantly increase the modeling process.

Elaboration of Visualization Modes for Lighting Simulation in CATIA CAD System

Elaboration of Visualization Modes for Lighting Simulation in CATIA CAD System

Development of a 3D CFD aerodynamic optimization tool and application to engine air intake design

PurposeThe paper deals with research activities to develop optimization workflows implying computational fluid dynamics (CFD) modelling. The purpose of this paper is to present an industrial and fully-automated optimal design tool, able to handle objectives, constraints, multi-parameters and multi-points optimization on a given CATIA CAD. The work is realized on Rapid And CostEffective Rotorcraft compound rotorcraft in the framework of the Fast RotorCraft Innovative Aircraft Demonstrator Platform (IADP) within the Clean Sky 2 programme.Design/methodology/approachThe proposed solution relies on an automated CAD-CFD workflow called through the optimization process based on surrogate-based optimization (SBO) techniques. The SBO workflow has been specifically developed.FindingsThe methodology is validated on a simple configuration (bended pipe with two parameters). Then, the process is applied on a full compound rotorcraft to minimize the flow distortion at the engine entry. The design of the experiment and the optimization loop act on seven design parameters of the air inlet and for each individual the evaluation is performed on two operation points, namely, cruise flight and hover case. Finally, the best design is analyzed and aerodynamic performances are compared with the initial design.Originality/valueThe adding value of the developed process is to deal with geometric integration conflicts addressed through a specific CAD module and the implementation of a penalty function method to manage the unsuccessful evaluation of any individual.

Computer simulation of railway wagon brake disc casting

CAD systems serving as the model for real industrial processes are almost an inseparable part of manufacturing in many industry branches. The use of simulation programs in the foundry industry is perceived as a tool for the visualization of the processes involved in the production of castings. They are also used to resolve possible issues and imperfections before the production begins. Consequently, it enhances the quality and reduces product-manufacturing-related financial costs. The paper tackles the issue of how to resolve the occurrence of defects – shrinkages in the railway wagon disc casting while using a simulation program. The 3D model of the casting and of the system of gates was constructed in the CATIA CAD system. The mere simulation of the casting and solidification process was done in the NovaFlow&Solid program. After evaluating the results of the simulation, the correction of the casting and gates was made in order at once to enhance the quality of the casting and reduce the production costs in the manufacturing of this casting. In the production of the brake disk casting, the main issues are little usage of molten metal during casting and the considerable occurrence of shrinkages, which causes the increased economic costs of its production.

Automatic Modelling of Photograhed Parts in CATIA CAD Environment

In this study, a system was developed that can model parts in CATIA CAD program automatically by using photographic images obtained from the parts. The system, called ImageCAD, can use very kind of photography that was taken for prismatic and cylindrical parts. It can recognize geometric entities, such as lines, circles, arc and free curve, in the image by according to the selection of the user. ImageCAD can save generated knowledge of the entities in a suitable format for the CATIA program. ImageCAD, is controlled by using menus that were done in the CATIA interface, turn whatever you want photographs into 3B CAD models. The obtained CAD models have suitable structure that can be used for all CATIA application. Visual Basic programing language was preferred to design the system.

Engineering Design of a Special Purpose Functional Magnetic Resonance Scanner Magnet

A 2 T open magnetic resonance imaging scanner for functional magnetic resonance imaging investigations of subjects maintaining a natural stance and free access to the environment is presented. The self-shielded multicoil magnet is composed of solenoids optimized in positions and cross-sectional shape. It provides a room temperature gap of 800 mm at the subject shoulders, tapering down to 600 mm at its narrowest point. The system consists of symmetrical magnetic poles, five NbTi superconducting coils each, maintained at 4.2 K in a liquid helium cryostat with a re-condenser. Windings, coil formers, mechanical structure, cryostat, vacuum chamber, thermal shield, mechanical supports, and cryogenics have been modeled in detail using Catia CAD software, accounting for the interactions among components and the constraints posed by winding and assembly methods. The cable characteristics have been chosen based on simulations of thermodynamic stability in operating conditions; self-protection against quench has been provided by inductance subdivision with bypass diodes.

Design evaluation of a follower cam with variable valve lift mechanism

PurposeThe purpose of this paper is to present a methodology for design, analysis and evaluation of cam‐follower systems used for the control of valve movement in internal combustion engines. The strategy begins with the inverse engineering of existing motor parts, designing them with the CATIA CAD Software and consequentially the created assembly is simulated using real time conditions in SimDesigner software, with the Adams Solver.Design/methodology/approachThe cam profile is generated and the kinematic and dynamic analysis of the variable valve mechanism is presented. The whole mechanism is verified in a dynamics analysis to check the validity of the criteria for the follower‐cam system design. Comparisons with standard profiles of motion were made, while it is also evaluated in an experimental device, where the actual valve displacement was measured.FindingsThe variable valve lift mechanism is designed to have maximum lifts greater than the lift of the conventional mechanism, with the geometrical constraints, profile of forces, velocities and accelerations to be better, in terms of stresses and work required, than the design of conventional mechanisms.Originality/valueThe novelty of the paper is consisted in presenting an integrated simulation methodology in order to precisely model, in component and assembly basis, the follower cam mechanisms with variable valve lift, and using the available software to perform the kinematic and dynamic analysis. The proposed simulation methodology can be easily adapted by a design engineer to model and to analyzed kinematically and dynamically moving components and assemblies found in internal combustion engines and not only.

CAD Based Geometric Procedures for Workspace and Singularity Determination of the 3-RPR Parallel Manipulator

This paper presents a set of techniques based on the use of CAD geometric approaches for singularity surfaces and total operational workspace and joint space determination. The main emphasis is given to the use of CAD tools used to characterize and analyze the performance of planar parallel robot manipulators. The CAD environment provides powerful tools for the graphical programming and geometric feature handling. This paper points out the effectiveness of such a method in the robot design process. These developments are illustrated by the 3-RPR planar parallel manipulator case study. All of the proposed geometric algorithms are implemented in the CATIA CAD environment.

Heat transfer to a heavy liquid metal in curved geometry: Code validation and CFD simulation for the M egapie lower target

The ESS and SINQ Heat Emitting Temperature Sensing Surface (HETSS) mercury experiments have been used to validate the Computational Fluid Dynamics (CFD) code CFX-4 employed in designing the lower region of the international liquid–metal cooled M egapie target, to be installed at SINQ, PSI, in 2006. Conclusions were drawn on the best turbulence models and degrees of mesh refinement to apply , and a new CFD model of the M egapie geometry was made, based on the CATIA CAD design of the exact geometry constructed. This model contained the fill and drain tubes as well as the bypass feed duct, with the differences in relative vertical length due to thermal expansion being considered between these tubes and the window. Results of the mercury experiments showed that CFD calculations can be trusted to give peak target window temperature under normal operational conditions to within about ±10%. The target nozzle actually constructed varied from the theoretical design model used for CFD due to the need to apply more generous separation distances between the nozzle and the window. In addition, the bypass duct contraction approaching the nozzle exit was less sharp compared with earlier designs. Both of these changes modified the bypass jet penetration and coverage of the heated window zone. Peak external window temperature with a 1.4 mA proton beam and steady-state operation is now predicted to be 375 °C, with internal temperature 354.0 °C (about 32 °C above earlier predictions). Increasing bypass flow from 2.5 to 3.0 kg/s lowers these peak temperatures by about 12 °C. Stress analysis still needs to be made, based on these thermal data.