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Dynamic and thermal model for hydraulic shock absorbers

Riccardo Andrighetto

Dynamic and thermal model for hydraulic shock absorbers.

Rel. Domenic D'Ambrosio, Roberto Marsilio. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Aerospaziale, 2018

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Abstract:

The purpose of the thesis is to develop a compressible and thermal model for automotive dampers. The selected approach is a lumped parameter modelling which shortens preliminary design sizing process if compared to a time-consuming detailed CFD. Twin tube configuration is taken as reference: four main regions are identified such as rebound, compression and reserve chamber which are filled with damper medium while the fourth is constituted by gas chamber. Starting from the simplest formulation, the incompressible one, each model is analysed including progressively compressibility and thermal effects. In the lumped system analysis also damper main solid parts are modelled. Temperature influence on viscosity is accounted for in both local and wall-friction losses. Numerical validation is provided to guarantee mass and energy conservation. For Matlab implementation classical ODE resolution and mass-matrix formulation is investigated in terms of CPU time.

Relators: Domenic D'Ambrosio, Roberto Marsilio
Academic year: 2018/19
Publication type: Electronic
Number of Pages: 117
Subjects:
Corso di laurea: Corso di laurea magistrale in Ingegneria Aerospaziale
Classe di laurea: New organization > Master science > LM-20 - AEROSPATIAL AND ASTRONAUTIC ENGINEERING
Aziende collaboratrici: UNSPECIFIED
URI: http://webthesis.biblio.polito.it/id/eprint/8403
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