Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Modelling of a Motorcycle with a Biodynamic Pilot and a New Integration Method
Submission Author:
Leonardo Roso Colpo , RS
Co-Authors:
Leonardo Roso Colpo, Alison Lima, Herbert Gomes, José Picoral
Presenter: Leonardo Roso Colpo
doi://10.26678/ABCM.COBEM2023.COB2023-0209
Abstract
The use of motorcycles as a mode of transportation has increased over the years, mostly as a more affordable and agile substitute for daily displacements. The design for the suspension of these vehicles requires the analysis of several factors, including the purpose of the motorcycle utilization, as well as aesthetic, ergonomic, comfort and safety aspects. The key factor affecting the pilot's comfort is the motorcycle vibration, caused by the road excitations, accelerations in the maneuvers and the engine vibration itself. In this sense, this work proposes a comparative study to verify which factors can most affect the vibration felt by the pilot and improve drivability, also comparing the integration algorithm used in the interpretation of the results. For that, it is proposed the modeling of the motorcycle suspension system, with 5 degrees of freedom for the vertical dynamics, 4-GDL for the lateral dynamics and a proposal of two biodynamic models, with 8 and 12-GDL. This work proposes the modeling of the dynamic vibrational behavior using two integration methods, traditional Newmark and quadratic Newmark. The other monitored variable was the route established by ISO 2631-1 (1997), which alternated between an irregular track, with a roughness and perfectly smooth. Then the motorcycle is held in a single lane change maneuver as per ISO 3888-2 (2011). The results can indicate the practical differences obtained when simulating the motorcycle with the 8 or 12 DOF biodynamic model in order to justify a more complex representation of the human body, as so the influence in the results caused by the road roughness. Also, the quadratic Newmark integration method can be compared with previous studies to verify its consistency, speed of calculation and accuracy. All the findings of this work can be assessment tools in the evaluation of motorcycle design, contributing to improve the motorcycle driving conditions and safety.
Keywords
Motorcycle dynamics, Quadratic Newmark Method, Biodynamic model, Lateral dynamics, Comfort and Vehicle Safety
