Desenvolvimento de metodologia para otimização dinâmica e estrutural de suspensão veicular traseira do tipo eixo de torção

• Ano de defesa: 2019
• Autor(a) principal: Guilherme Costa Carneiro
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; Brasil; ENG - DEPARTAMENTO DE ENGENHARIA MECÂNICA; Programa de Pós-Graduação em Engenharia Mecanica; UFMG
• Palavras-chave em Português: Eixo de torção; Suspensão; Otimização numérica; Elementos finitos; Fadiga; Dinâmica veicular; Indústria automotiva; Simulador de dinâmica veicular; Otimização multidisciplinar; Engenharia mecânica; Indústria automobilística; Método dos elementos finitos; Otimização estrutural
• Link de acesso: http://hdl.handle.net/1843/34906

This research work aims to create a robust methodology for the twist beam development focusing on the optimization problem definition. The problem definition, in other words, the correct definition of the targets and constraints allows the desired result to be obtained. The twist beam must be durable enough to absorb all forces from maneuvers and road irregularities. In addition, its design directly effects the dynamic behavior of the vehicle. For the twist beam, the vehicle dynamic targets and fatigue loads definition at the start of the project are the main steps in making a twist beam suspension with the expected strength and optimized dynamic behavior. And the correct definition is only possible when the understanding of the effects that variations in structural and elastokinematic parameters can cause on the performance of the component and the vehicle exists. Researchers have been using numerical optimization software in the twist beam development and have demonstrated a promising path in the face of the challenge of obtaining a twist beam suspension with an optimized dynamic behavior and structural strength. A vehicle dynamics simulator will be used to correlate the twist beam elastokinematics and the vehicle dynamic behavior. Numerical models with different twist beam design proposals will be evaluated in the simulator and the pilot's subjective evaluation together with multibody simulations will be used to in the correlation. The load generation in virtual environment will be the procedure used in the durability load cycle definition to which the twist beam suspension will be subjected. Through the construction of a complete vehicle numerical model and the use of digitized durability tracks, the durability load cycle will be generated and evaluated even before a prototype is built. Through DOE analyzes, using the aforementioned tools, the main structural and elastokinematic parameters were mapped and the effects of the respective variations obtained. Finally, obtaining the necessary knowledge for the construction of the twist beam development methodology.