Abstract
Keywords - Vibration, Bracket, JB, Simulation, Block
Abstract - Our earlier design tool is useful for performing heat transfer analysis of electricity distribution boxes or junction blocks, and can reduce the design time. In this paper, we propose a modelling tool for the vibration analysis of junction blocks. This modelling tool is based on our experience with the development of the heat transfer analysis tool. (1)(2)
The influence of vibration on the electrical components of a vehicle is as important as that of heat transfer. In this case, the main goals are to identify the resonant frequency and the weak points, and to ensure that normal operation is not impaired by vibration. In other words, the lifespan prediction is one of the most important tasks. In heat transfer analysis, the influence of mounting brackets is negligible, but in the case of vibration, the main body of the box, brackets and components should all be considered. The proposed modelling tool is composed of library editors and a data exporter. The library editors can organize the data on main bodies, components and brackets, integrating their geometry and material properties. The data exporter then provides the data to the solver program.
Bracket design should be modified for each of the various car body designs. The main body of the distribution box is typically modified every three years. This tool is useful not only for design creation, but also for design modification. In the conventional method, an engineer must construct a mesh and input material properties manually. Even if the mesh can be provided by an automatic mesh generation tool, integrating the material properties remains problematic. The library data contains shape information, material properties and arrangement information. With this tool, the combined data structure that incorporates all the library information can be processed smoothly. With this tool, the geometry, mesh structure, and boundary conditions can be obtained simultaneously. As a result, preparation time for vibration analysis is reduced by approximately 50%.