Influence of Design Parameters in the Brake Squeal in Electric Cars

• Autor(a) principal: Albuquerque de Freitas, Thiago Victor
• Data de Publicação: 2023
• Outros Autores: Rodrigues, Romulo do Nascimento, Costa, Camilo Augusto Santos, Bezerra, Roberto de Araújo, Gonçalves, Vanessa Vieira, Maciel, Mateus Holanda Cardoso, Queiroz, Denilson Marques
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Brasileira de Física Tecnológica Aplicada
• Texto Completo: https://periodicos.utfpr.edu.br/rbfta/article/view/17352
• topic: Métodos de Síntese e Otimização Aplicados ao Projeto Mecânico; brake noise; complex modal analysis; finite elements

Electric cars have many advantages over vehicles that require fossil fuels for their use. However, both types of cars are subject to problems related to brake squeal, which is a noise that causes discomfort for those inside the vehicle. In particular, this problem is more significant in electric cars because the motor operates silently compared to internal combustion engines, making the noise more obvious. In this context, the aim of this study is to perform a parametric analysis to verify the influence of design parameters on squeal in a cooled disc brake of an electric car. Therefore, finite element methods were used to analyse the brake geometry, which was subjected to static and modal analyses to extract complex eigenvalues and identify unstable modes. The simulation results indicated that the friction coefficient, stiffness of the components of system, and brake pressure are significant to the performance of the brake system, being the Young's modulus of the back plate the best parameter to minimize the brake squeal.