EVALUATION AND VALIDATION OF AN AIR SPRING ANALYTICAL MODEL
Keywords:
air spring analytical model, non-dimensional model, bellow springAbstract
The present paper responds to the following aim: to define a model, which can predict quite well the static character-istic of a bellow spring. In detail an analytical non-dimensional model of the bellow spring is obtained. It can describe the axial force and the effective area apart from its geometric size. The typical parameters of this model are spring geo-metrical ratio and number of convolutions. No detailed information about membrane characteristic is required. Internal volume and spring stiffness equations are then analytically derived. At last a dynamic model of the spring is developed using the static characteristics previously defined. This tool would be useful for particular applications that involve dynamics as a keyword, such as vibration isolators, vehicle sus-pensions and actuators.
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References
Quaglia, G., Mauro, S. and Sorli, M. 1994. Semi-Active Hydropneumatic Suspension. Proc. 27th Int. Symposium on Automotive Technology & Automa-tion ISATA, pp. 173-180.
Quaglia, G., Sorli, M., Franco, W., Mauro, S., Giu-zio, R. and Vernillo, G. 1998. Features of a Lateral Active Pneumatic Suspension in the High Speed Train ETR470. Proc. 6th UK Mechatronics Forum Int. Conf. Mechatronics '98, pp. 288-293.
Quaglia, G. and Sorli, M. 1999. Analysis of Vehicular Air Suspensions. 4th JHPS Int. Symp. on Fluid Power, Tokyo, pp. 389-394.
Quaglia, G., Sorli, M. and Guala, A. 2000. Air Sus-pensions: Non Linear Analysis and Design Consid-erations. 2nd IFK Int. Fluidtechnisches Kolloquium, Dresden, pp. 479-492.
Quaglia, G. and Sorli, M. 2000. Experimental and Theoretical Analysis of an Air Spring with Auxilia-ry Reservoir. Proc. of the 6th International Sympo-sium on Fluid Control Measurement and Visualiza-tion (FLUCOME 2000), Sherbrooke, Canada.
Quaglia, G. and Sorli, M. 2001. Air Suspension Di-mensionless Analysis and Design Procedure. Vehi-cle System Dynamics, Vol. 6, pp. 443-475.
Cavanaugh, R. D. 1961. Air Suspension and Servo-controlled Pneumatic Isolation Systems. Shock andVibration Handbook, McGraw-Hill B.C., Chapter 33.
Kornhauser, A. A. and Smith, J. L. Jr. 1993. The Effects of Heat Transfer on Gas Spring Perfor-mance. Journal of Energy Resource Technology, Vol. 115, pp. 70-75.
Kornhauser, A. A. 1994. Dynamic Modelling of Gas Springs. Trans. ASME: Journal of Dyn. Sys. Meas. and Cont. 116, pp. 414-418.
Bachrach, B. I. and Rivin, E. 1983. Analysis of a Damped Pneumatic Spring. Journal of Sound and Vibration, Vol. 86 (2), pp. 191-197.
Toyofuku, K., Yamada, C., Kagawa, T. and Fujita T. 1999. Study on Dynamic Characteristic Analysis of Air Spring with Auxiliary Chamber. JSAE re-view, pp. 349-355.
Gee-Clough, D. and Waller, R. A. 1968. An Improved Self-Damped Pneumatic Isolator. Journal Sound Vibration, Vol. 8 (3), pp. 364-376.
Soliman, J. I. and Tajer Ardabili, D. 1966. Self-Damped Pneumatic Isolator for Variable Frequency Excitation. Journal of Mechanical Engineering Sci-ence, Vol. 8 (3).
Stein, G. J. 1995. Results of Investigation of an Elec-tropneumatic Active Vibration Control System for a Driver’s Seat. Proc. Inst. Mech. Engrs. part D, Vol. 209, pp. 227-234.
