High-frequency model of monotube shock absorbers

• Autorzy: Gołdasz J.
• Języki publikacji: EN

Abstrakty

EN

It has been long recognized that the inertia and compressibility of the fluid have an impact on the dynamic behaviour of semi-active monotube shock absorbers utilizing so-called smart ER/MR fluids at high frequencies of the system operation. Previous studies which dealt with analytical state-space & CFD models of the magnetorheological shock absorber in a monotube configuration indicated that any conventional analytical model is lightly damped and not suitable for dynamic studies above 100-150 Hz. Therefore, in the present paper the author illustrates an analytical model of a monotube shock absorber that is suitable for high-frequency studies. In particular, the study presents a comparison between the CFD results and the new model. Finally, the shock absorber characteristics in the form of Bode plots of amplitude and frequency are presented within a prescribed range of frequencies.

Słowa kluczowe

EN

shock absorber; CFD; analytical model

PL

amortyzator; CFD; obliczeniowa mechanika płynów; model analityczny

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej. Oddział Gliwice
• Czasopismo: Modelowanie Inżynierskie
• Rocznik: 2010
• Tom: T. 8, nr 39
• Strony: 81--88
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Gołdasz J.

• BWI Group, Technical Center Kraków, ul. Podgórki Tynieckie 2, 30-399 Kraków,

Bibliografia

• 1. Alexandridis A. A., Gołdasz, J.: High-frequency Dynamics of Magneto-Rheological Dampers. In: Proceedings of the Ninth International Conference on New Actuators („ACTUATOR 2004”), Bremen, Germany, 14-16 June, 2004.
• 2. Alexandridis A. A, Gołdasz J.: Simplified model of the dynamics of magneto-rheological dampers. „Mechanics” 2005, Vol. 24(2), p. 47-53.
• 3. Gołdasz, J., Alexandridis A. A.: Frequency-dependent behavior of MR dampers: CFD Study. In: Proceedings of the Active Noise and Vibration Control Methods Conference („MARDiH 2007”), Krasiczyn, Poland, 11-14 June, 2007.
• 4. Peel D. J., Stanway R., Bullough W. A.: Dynamic modeling of ER vibration damper for vehicle suspension applications. „Smart Materials and Structures” 1996, Vol. 5, p. 591-606.
• 5. Hopkins P. N.: Magnetorheological fluid damper. US Patent 6311810, 2001.
• 6. Petek, N.: Adjustable dampers using electrorheological fluids. US Patent 5259487, 1993.
• 7. Nguyen Q.-H., Choi S.: A new approach for dynamic modeling of an electrorheological damper using a lumped parameter method, Nguyen, Quoc-Hung; Choi, Seung-Bok, „Smart Materials and Structures” 2009, Vol. 18(11), p. 115 - 120.