Telefon: +46 (0)8 790 6805
Besöksadress: Brinellvägen 85
My research covers fluid film bearings. The focus is on
- bearing dynamics (linear and nonlinear)
- bearing design
- improvement in performance
My current work is related to bearings in hydropower stations. Hydropower stations have environmentally friendly operating conditions. It does not produce any carbon dioxide to cause greenhouse effect which is the major concern nowadays. In order to be more efficient, bearings in hydroelectric power units needs further development in terms of pad design and bearing liner material.
Compliant polymer liners as bearing liner material have shown an outstanding bearing characteristics at static loading conditions for plain cylindrical journal bearings. Also, compliant polymer materials have much lower breakaway friction compared to traditional white metal also known as babbitt.
Helping with supervising master project student working with fluid film bearings.
Laboratory teacher for Tribology course
Department of Machine Design, KTH Royal Institute of Technology, Stockholm, Sweden, November 2011-Present
Department of Engineering Science and Mathematics, Luleå University of Technology, Luleå, Sweden, March 2009-October 2011
Master of Applied Science (Aerospace)
Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, Canada, September 2005-August 2007
Bachelor of Aerospace Engineering (Electronics and Systems)
Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, Canada, September 2001-April 2005
1. M.Cha, "Nonlinear isoviscous behaviour of compliant journal bearings", Licentiate Thesis, 2012, KTH Royal Institute of Technology
2. M.Cha, P.Isaksson, S.Glavatskih, "Influence of pad compliance on nonlinear dynamic behaviour of tilting pad journal bearings", Tribology International, vol. 57, 2013, pp. 46-53
3. M.Cha, E.Kuznetsov, S.Glavatskih, “A comparative linear and nonlinear dynamic analysis of compliant cylindrical journal bearings”, Mechanisms and Machine Theory, vol. 64, 2013, pp. 80-92
1. M.Cha, E.Kuznetsov, S.Glavatskih, “A comparative linear and nonlinear dynamic analysis of compliant cylindrical journal bearings”, STLE Annual Meeting 2010, May 16-20, Las Vegas, USA (Conference presentation)
2. M.Cha, P.Isaksson, S.Glavatskih, “Influence of pad compliance on nonlinear dynamic behaviour of tilting pad journal bearings”, STLE Annual Meeting 2011, May 15-19, Atlanta, USA (Conference presentation)
3. M.Cha, S.Glavatskih, “Nonlinear Dynamic Response of Compliant Journal Bearings”, Proceedings of the International Conference on Structural Nonlinear Dynamics and Diagnosis, April 30-May 2, 2012, Marrakech, Morocco (CSNDD2012-10005)
4. M.Cha, S.Glavatskih, “Journal Vibration: Influence of Compliant Bearing Design”, Proceedings of the ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis, July 2-4, 2012, Nantes, France (ESDA2012-82939)