DRAFT OF DESIGN VARIANTS TO THE BASIC FRAME OF AN ULTRALIGHT HELICOPTER

Abstract

This thesis discusses several different design proposals of the basic support frame in an ultralight helicopter. The aim of the study is to define possible modifications of the original design and to meet dimensional requirements of the new engine, while maintaining or increasing the rigidity of the structure. Another objective is to create a new arrangement of the supporting frame structures to further increase rigidity and weight reduction. The study was conducted in the programming environment called Creo Simulation and ProMECHANICA Wildfire 5.0; using the idealization of the beam structures. The individual design proposals were evaluated in terms of stress, deformation, beam resultants and buckling stability. Computing knowledge application and mathematics solutions originate mainly from the elastic properties of the parts maintaining the buckling stability of centrally loaded beams. Centrally loaded beams are subjected to compressive loads of other beam structures. The conclusion is to describe the process of evaluation and selection of the most appropriate design frame structure in terms of the weight and stiffness ratio.