Publicação
Otimização estrutural computacional da estrutura do rocker bogie de um rover espacial através de métodos sem malha
| Resumo: | The cost of planetary missions is influenced by the mass of the components being transported into space. For this purpose, structural optimization techniques which reduce mass without compromising the mechanical performance of the component can be employed. Through finite element and meshless methods, planetary rovers can be effectively analysed and optimized, resulting in enhanced overall performance and better resilience to the extreme conditions encountered on Mars. This thesis includes a comprehensive literature review on space exploration technologies, as well as on meshless and finite element methods, with particular emphasis on the Radial Point Interpolation Method (RPIM) and the Natural Neighbours Radial Point Interpolation Method (NNRPIM). The accuracy and effectiveness of the selected methods and structural optimization techniques are validated through benchmark examples. After this validation, these methods are applied to the optimization of the suspension system of NASA’s Perseverance Rover, resulting in significantly improved structural performance, including lower Von Mises stress values and increased stiffness compared to the current design. By utilizing meshless methods in the suspension system optimization and analysis, this thesis aims to contribute to ongoing and future research in structural optimization and meshless methods, thereby enriching the existing literature on the subject. |
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| Autores principais: | SILVA, JOÃO PEDRO BASÍLIO |
| Assunto: | Meshless methods Finite element methods Structural optimization Perseverance Rover Métodos sem malha Métodos de elementos finitos Otimização estrutural |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico do Porto |
| Idioma: | inglês |
| Origem: | Repositório Científico do Instituto Politécnico do Porto |
| Resumo: | The cost of planetary missions is influenced by the mass of the components being transported into space. For this purpose, structural optimization techniques which reduce mass without compromising the mechanical performance of the component can be employed. Through finite element and meshless methods, planetary rovers can be effectively analysed and optimized, resulting in enhanced overall performance and better resilience to the extreme conditions encountered on Mars. This thesis includes a comprehensive literature review on space exploration technologies, as well as on meshless and finite element methods, with particular emphasis on the Radial Point Interpolation Method (RPIM) and the Natural Neighbours Radial Point Interpolation Method (NNRPIM). The accuracy and effectiveness of the selected methods and structural optimization techniques are validated through benchmark examples. After this validation, these methods are applied to the optimization of the suspension system of NASA’s Perseverance Rover, resulting in significantly improved structural performance, including lower Von Mises stress values and increased stiffness compared to the current design. By utilizing meshless methods in the suspension system optimization and analysis, this thesis aims to contribute to ongoing and future research in structural optimization and meshless methods, thereby enriching the existing literature on the subject. |
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