|Tipo di tesi||Tesi di laurea magistrale|
|Autore||CAIAFFA, ARMANDO LORENZO|
|Titolo||Analisi lineare di modelli multibody di motocicletta a complessità crescente|
|Titolo in inglese||Linear analysis of motorcycle multibody models of increasing complexity|
|Struttura||Dipartimento di Ingegneria "Enzo Ferrari"|
|Corso di studi||Ingegneria Del Veicolo (D.M.270/04)|
|Data inizio appello||2021-04-15|
|Disponibilità||Accessibile via web (tutti i file della tesi sono accessibili)|
La tesi ha come obiettivo quello di realizzare l’analisi modale di una motocicletta ad alte prestazioni attraverso l’utilizzo di un modello multibody con l’ausilio del software Adams.
The aim of this thesis is to set the modal analysis of a high-performance motorcycle through the use of a multibody model, with the aid of Adams software. The investigated phenomena are studied by linear analysis of a multibody model already present on VI-Motorcycle and, in particular by using the Weave/Wobble Linear Analysis, which allows to linearize the model in a frozen time configuration and calculate its eigenvalues and modal forms, allowing to investigate the influence of different parameters on the vibrational modes, as well as the variation of the participation factors of each states according to the maneuver involved. In order to carry out a step-by-step study, models of increasing complexity are considered, starting from a basic model with bocked suspensions and rigid chain transmission, and then moving on to gradually unlocking the transmission first, then the front suspension, and finally the rear one. These models are studied in two specific maneuvers of interest: straight motion, at constant speed, and motion in curves, at constant speed and increasing roll angle, following a spiral path. The results obtained are then reported in terms of root locus with the influence of one parameter per time, and evaluations are made on the characteristics of these modes according to the complexity of investigated model. Finally, the linear analysis of a maneuver with the presence of braking actions is reported, to evaluate the influence of braking on the stability of vibrational modes.