A new paradigm of mechanical energy dissipation. Part 1: Theoretical aspects and practical solutions

Abstract

Although fluid viscosity and speed are still most widely used for dissipating mechanical energy, current research and development on conventional dampers is beginning to saturate; creative design initiatives to obtain higher performance with conventional passive dampers are limited. In order to provide new levels of comfort, reliability, and dissipative power of damping, the present author suggests using the repulsive forces acting within interfaces between capillary-porous solids with high specific surface and non-wetting liquids. When placed in working chambers and subjected to periodical compression-expansion processes, such working media demonstrate pronounced hysteresis phenomena in pressure-volume coordinates, which characterize dissipated energy with specific (volumetric) values 10–100 times greater than that of conventional dampers.

Furthermore, it is possible to design a damper where the force may depend insignificantly on the speed of rod displacement (the damping coefficient tending to zero) within a wide range of speed values. In this way, there is a new solution to the ‘comfort-road holding’ trade-off; reliable wheel-road adhesion is possible even for zero damping coefficient (perfect comfort).

This new paradigm of mechanical energy dissipation substantially improves damper performance qualitatively and quantitatively and extends its scope of application. The search for such a concept, its thermodynamic substantiation, and practical construction are the main objectives of this paper.

Keywords

lyophobic systems nanoporous matter capillary and viscous flows surface energy hydromechanical hysteresis shock absorber

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References

Newton

About bodies motions, Section IX: About fluid vortex. In De philosophiae naturalis principia mathematica (en latin), Livre II, 1687 (Regiae Societatis Typographos, London).

Soong

T. T.

Dargush

G. F.

Passive energy dissipation systems in structural engineering, 1998, 368 pp. (John Wiley, New York).

Dixon

J. C.

The shock absorber handbook, 1999, 495 pp. (SAE International, New York).

Bourcier de Carbon

Théorie mathématique et réalisation pratique de la suspension amortie des véhicules terrestres (in French). Surf. Interface Analysis, 1950, 10, 136–153.

Harris

C. M.

Crede

C. E.

Shock and vibrations handbook, 1968 (McGraw-Hill, New York).

Deutsh

Dynamique des véhicules routiers, 1970, 184 pp. (Organisme National de Sécurité Routière de la France, Arcueil-Angers).

Lemmens

Frequency dependent damper. US Pat. 6,148,969, 21 November 2000.

Reybrouck

Lemmens

Frequency dependent damper. US Pat. 2002/0104724 A1, 8 August 2002.

Eck

Jarusek

Existence results for the static contact problem with Coulomb friction. Math. Models: Meth. Appl. Sci., 1998, 8, 445–468.

10.

Eroshenko

V. A.

Unusual properties of some complex thermodynamic systems (in Russian). Dokl. Akad. Nauk Ukr. SSR, Ser. A: Phys. Math. Tech. Sci., 1990, 10, 79–82.

11.

Eroshenko

V. A.

Dimensionalité de l'espace comme potentiel thermodynamique d'un système (in French). Entropie, 1997, 202–203, 110–114.

12.

Eroshenko

V. A.

Heterogeneous structure for accumulation or dissipation of energy, process to use it and associated devices. Int. Pat. WO 96/18040, 13 June 1996.

13.

Neinhuis

Barthlott

Characterisation and distribution of water-repellent, self-cleaning plant surfaces. Ann. Botany, 1997, 79, 667–677.

14.

Wagner

Fürstner

Barthlott

Neinhuis

Quantitative assessment to the structural basis of water repellency in natural and technical surfaces. J. Expl Botany, 2003, 54(385), 1295–1303.

15.

Reïs

Introduction à la science physique des surfaces (in French), 1952, 286 pp. (Dunod, Paris).

16.

Eroshenko

V. A.

Repulsive clathrates. A new operational material for efficient seismic isolation. In Proceedings of the International Post-SMITR Conference on

Seismic isolation, passive energy dissipation and active control of seismic vibrations of structure, Taormina, Sicily, Italy, 25–27 August 1997, pp. 783–794 (IAEA, Wien, Austria).

17.

Lehn

J.-M.

La chimie supramoléculaire (in French), 1997, 279 pp. (De Boeck et Larcier, Paris).

18.

Unger

K. K.

Porous silica. Its properties and use as support in column liquid chromatography, Journal of Chromatography Library, Vol. 16, 1979 (Elsevier, Amsterdam).

19.

Eroshenko

V. A.

Fadeev

A. Y.

Intrusion and extrusion of water in hydrophobized porous silica. Colloid, J., 1995, 57(4), 446–449.

20.

Washburn

E. W.

Note on a method of determining the distribution of pore size in porous material. Proc. Natn. Acad. Sci. USA, 1921, 7, 115–124.

21.

Eroshenko

Regis

R.-C.

Soulard

Patarin

Energetics: A new field of applications for hydrophobic zeolites. J. Am. Chem. Soc., 2001, 123, 8129–8130.

22.

Eroshenko

Regis

R.-C.

Soulard

Patarin

Les systèmes hétérogénes ‘eau-zéolithe hydrophobe': De nouveaux ressorts moléculaires (in French). C. R. Physique, 2002, 3, 111–119.

23.

Eroshenko

V. A.

Thermodynamique des nano-systémes hétérogénes et energétique thermo-moléculaire (in French). Journée Scientifique ENSTA, Ecole Nationale Superieure de Techniques Avancées, Paris, 27 June 1996.

24.

Eroshenko

V. A.

Effect of heat exchange on filling of lyophobic pores and capillaries with liquid. Colloid. J., 1987, 49(5), 875–880.

25.

Eroshenko

V. A.

Non-compressibilité et non-dilatabilité adiabatiques d'un systéme thermodynamique complexe. Entropie, 1996, 196, 17–23.

26.

Eroshenko

V. A.

Stoudenets

V. P.

The influence of developed interfaces upon the heterogeneous nanosystem thermal capacity. Composites: Part A, 2002, 33, 1349–1353.

27.

Eroshenko

V. A.

Influence of specific interface of lyophobic heterogenous systems upon observable thermal effects during isothermal compression (in Russian). Mendeleev Chem. J., 2002, 46(3), 31–38.

28.

Eroshenko

V. A.

Damper with high dissipating power. Int. Pat. WO 01/55616 A1, 2 August 2001, pp. 1–33.

29.

Oustalop

Sabatier

Moreau

The CRONE suspension. Control Engng Practice, 1996, 4, 1101–1108.

30.

Bonneau

Suspensions. Vous ne sentiez plus les bosses (in French). Science Vie, September 2004, (1044), 94–97.

31.

Herr

Lin

T. M.

Lane

Roth

A shock absorber model using analysis and Easy 5, 1999, Vol. 1, p. 1322 (SAE International, New York).

32.

Kitching

K. J.

Cole

D. J.

Cebon

Performance of a semi-active damper for heavy vehicles. Trans. ASME, J. Dynamic Systems, Measmt Control, 2000, 122, 498–506.

33.

Schiehlen

Spectral simulation and shock absorber identification. Int. J. Non-Linear Mechanics, 2003, 38, 161–171.