Banca de DEFESA: BRUNO RIBEIRO GALDINI

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : BRUNO RIBEIRO GALDINI
DATE: 29/11/2022
TIME: 13:00
LOCAL: Sao Bernardo do Campo
TITLE:

Topologic optimization for controlling modal frequencies of an idealized cubsat.

PAGES: 107
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUBÁREA: Mecânica dos Sólidos
SPECIALTY: Análise de Tensões
SUMMARY:

CubeSats have become increasingly used in the aerospace industry, mainly
due to their pre-defined design standards, which make them more accessible
and facilitate the development and research, not only for students and
universities but also for big companies. In addition, Cubesats are great allies
of low cost, as they have simplified modeling and low structural weight, an
extremely relevant point for aerospace sector.
Even so, during their launch into space, CubeSats are subject to external
loads like any other satellite, such as structural vibrations, which requires
technical analysis to simulate such conditions, mainly to avoid possible
catastrophes in their launch. In that context, computational tools and
mathematical models are essential to facilitate such analyses.
This thesis proposes the application of topology optimization methods aiming
the development of CubeSat structures vibrating into different frequency
bands, through the control of their natural frequencies (modal analysis) and
mass reduction, as a way of avoiding some resonance zones that a CubeSat
could face at its launch. The methodology developed is implemented on two
cases, a preliminary theoretical one, developed through the specifications
proposed by the California Polytechnic State University, and a second one,
based on a real CubeSat of the Sirius team from Federal University of ABC. In
the first case, it was aimed the development of a general methodology for
topology optimization application, and in the second case, its implementation
in a pre-existing real model.
The modeling used is based on the finite element method (FEM) and the
simulations are performed using the Abaqus/CAE software. The technical
drawings were performed with CATIA V5 software.
The results obtained through simulations demonstrate that the proposed
methodology was efficient, bringing different CubeSat structures, lighter than
the initial ones and vibrating at different natural frequencies.

BANKING MEMBERS:
Presidente - Interno ao Programa - 2281705 - RAFAEL CELEGHINI SANTIAGO
Membro Titular - Examinador(a) Interno ao Programa - 1604134 - CICERO RIBEIRO DE LIMA
Membro Titular - Examinador(a) Externo ao Programa - 1763423 - WESLEY GOIS
Membro Suplente - Examinador(a) Interno ao Programa - 3042266 - WALLACE GUSMAO FERREIRA
Membro Suplente - Examinador(a) Externo ao Programa - 2336809 - CESAR MONZU FREIRE