Mechanism parametrization, modeling and FE-meshing

Abstract

This thesis is written to show the development of an application used for mechanism parametrization, modeling and finite element meshing. Concepts from Knowledge Based Engineering (KBE) are applied and the possibility of using the Sheth Uicker convention (SU) for parameterizing the links and joints of a mechanism is explored. A KBE application has been developed in the Adaptive Modeling Language (AML) implementing design rules and mechanism theory in a parametric model. The application features customization of the shape, dimension and cross section of links regardless of the number of joints connected. Incidence relationships together with joint position, type and direction are given as input and dimensions are calculated based on the connectivity of the mechanical system. The application also automatically meshes the model. From the work done automated modelling and meshing of mechanisms is demonstrated from given input parameters, and is an important step on the way to automate the entire mechanism design process. The application provides concept and ideas and a solid framework for further development that has the potential to drastically reduce routine work in the design process of mechanisms.