|Tipo di tesi
|Tesi di laurea magistrale
|SARZI AMADÈ, MATTEO
|Analisi dell’influenza delle caratteristiche aerodinamiche sulle prestazioni di un motociclo da competizione
|Titolo in inglese
|Analysis of the influence of aerodynamic characteristics on the performance of a racing motorcycle
|Dipartimento di Ingegneria "Enzo Ferrari"
|Corso di studi
|Ingegneria Del Veicolo (D.M.270/04)
|Data inizio appello
|Accesso limitato: si può decidere quali file della tesi rendere accessibili. Disponibilità mixed (scegli questa opzione se vuoi rendere inaccessibili tutti i file della tesi o parte di essi)
|Data di rilascio
L’aerodinamica gioca un ruolo chiave nella dinamica di un motociclo, sia che esso sia destinato all’utilizzo stradale, sia che sia progettato per correre in pista. Ducati Corse porta avanti da anni un grande lavoro di sviluppo aerodinamico finalizzato al disegno di carene sempre più efficaci e performanti al fine di rendere sempre più competitive le proprie moto.
Aerodynamics plays a key role in the dynamics of a motorbike, regardless of the destination of use (road or racing). Ducati Corse has been investing resources in aerodynamic development for years, in order to design new bodyworks. The goal is to improve the performance of the vehicle increasing the aerodynamic efficiency. The project described in this thesis is part of that field and focuses on the influence of aerodynamic characteristics on the performance of the motorcycle. In particular, it refers to the motorbike entrant to World Superbike Championship (Ducati Panigale R). The project can be resumed in two macro-analysis. The first analysis concerns the study of two two-dimensional models of motorbike in braking and in acceleration, with roll angle null and incipient capsizing condition. Four easy formulas have been extracted from these models: two for deceleration (concerning the braking case) and acceleration (for the acceleration case) and two for the grip coefficient for both. These formulas have been used to analyze the effect of aerodynamic coefficients in these dynamic situations. To complete the analysis, two multi-objective optimization problems were created to study the results of deceleration, acceleration and grip coefficient by changing aerodynamic coefficients (the other parameters were taken from the real bike). In this way, it’s possible to understand how every single aerodynamic term influences the results and to discover if any optimal values exist. This analysis aims to find the maximum decelerations and accelerations, and the minimum grip coefficient that it’s possible to obtain. The second analysis, instead, is based on the use of a Ducati’s private multibody software for motorcycle dynamics simulation. This program can calculate the lap time starting from the characteristics of the motorbike and from the track design. The first step was to realize four reference simulations for four racing circuits chosen among those of World Superbike Championship 2014. Then, every simulation was repeated six times, each time changing, one by one, the value of the aerodynamic coefficients. The comparison of these simulations with the respective of reference shows the sensitivity of the motorcycle’s performance by varying the aerodynamic coefficient. This study was done for three different bodyworks. The most interesting results have been deeply examined through the study of the physical reasons that led to an advantage or disadvantage on the lap time. The purpose of this project is the creation of a database of general informations that should be used to design the evolutions of the actual bodyworks of Ducati Panigale R racing version.