Print Email Facebook Twitter The Influence of Porosity on the Dynamic Characteristics of Porous Air Bearings Title The Influence of Porosity on the Dynamic Characteristics of Porous Air Bearings Author Burghoorn, Rick (TU Delft Mechanical, Maritime and Materials Engineering) Contributor van Ostayen, R.A.J. (mentor) Nijssen, Joep (graduation committee) van der Sanden, Jack (graduation committee) Degree granting institution Delft University of Technology Programme Mechanical Engineering | Mechatronic System Design (MSD) Date 2023-08-31 Abstract Air bearings are a vital component to high tech machines and have been in widespread use since the 1960s. They provide near frictionless motion, have high stiffness and a near infinite lifetime. When looking at existing literature the influence of the porosity on the dynamic characteristics has not been researched in depth. Especially when looking at porous air bearings with a surface restrictive layer, a discrepancy can be defined between the ideal surface restrictive layers considered in literature and layers that can be realized in reality. This report presents a model to accurately predict the dynamic characteristics of both bearings with and without a surface restrictive layer. An alternative intuitiveapproach is presented to explain the dynamic behaviour at low frequencies for these types of bearing based on the amount of stored air inside and underneath the bearing. This model is then used to investigate the influence of the porosity on the dynamic characteristics of a uncoated bearing. Followed by a study on the mechanics behind the surface restrictive layers and the sensitivity of the porosity of the surface restrictive layer. An existing dataset from an experiment is used to asses the viability of the model. Subject porous air bearingsdynamicspneumatic hammerporosityair bearings To reference this document use: http://resolver.tudelft.nl/uuid:1fa6462d-3749-4019-952b-4accb7b210ae Embargo date 2025-08-31 Part of collection Student theses Document type master thesis Rights © 2023 Rick Burghoorn Files file embargo until 2025-08-31