ANALYSIS OF LUBRICANT EFFECT ON STABILIZING THE DYNAMIC BEHAVIOR OF SLIDER-CRANK MECHANISM WITH REVOLUTE JOINT CLEARANCE

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RAHMANIAN SASAN; GHAZAVI MOHAMADREZA

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Journal: Modares Mechanical Engineering Year:2015 | Volume:14 | Issue:15 Page(s): 377-387

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Title

ANALYSIS OF LUBRICANT EFFECT ON STABILIZING THE DYNAMIC BEHAVIOR OF SLIDER-CRANK MECHANISM WITH REVOLUTE JOINT CLEARANCE

Author(s)

RAHMANIAN SASAN | GHAZAVI MOHAMADREZA | Issue Writer Certificate

Keywords

JOINT CLEARANCEQ2

SLIDER- CRANK MECHANISMQ2

FLUID LUBRICANTQ2

CHAOTIC BEHAVIORQ2

Abstract

In general, in dynamic analysis of mechanical systems joints are assumed to be ideal. However, due to errors in fabrication and assembly of components, existence of joints clearances is an inevitable problem that causes frequent collisions between the journal, and bearing and stable periodic behavior of the system becomes chaotic. Degradation of the dynamic performance of the system, reduction in fatigue life of components and producing undesirable vibrations are all factors resulting from impact-contact forces due to JOINT CLEARANCE. First, different contact force models for two surfaces have been introduced and dynamical models of revolute joint with clearance for two modes, namely, dry contact model and lubricated joint model are then presented. In this paper, the dynamic behavior of a slider-crank mechanism with a revolute JOINT CLEARANCE between the slider and connecting rod, using the Lankarani-Nikravesh contact force model is studied and compared to the ideal case. Considering the effect of friction between journal and bearing, governing equations of motion of the system for two phase, contact and non-contact modes are extracted and it is shown that system exhibits CHAOTIC BEHAVIOR under specified size of clearance. A FLUID LUBRICANT is used in clearance between journal and bearing for stabilizing an unstable periodic orbit embedded in the chaotic attractor.

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APA: Copy

RAHMANIAN, SASAN, & GHAZAVI, MOHAMADREZA. (2015). ANALYSIS OF LUBRICANT EFFECT ON STABILIZING THE DYNAMIC BEHAVIOR OF SLIDER-CRANK MECHANISM WITH REVOLUTE JOINT CLEARANCE. MODARES MECHANICAL ENGINEERING, 14(15), 377-387. SID. https://sid.ir/paper/177732/en

Vancouver: Copy

RAHMANIAN SASAN, GHAZAVI MOHAMADREZA. ANALYSIS OF LUBRICANT EFFECT ON STABILIZING THE DYNAMIC BEHAVIOR OF SLIDER-CRANK MECHANISM WITH REVOLUTE JOINT CLEARANCE. MODARES MECHANICAL ENGINEERING[Internet]. 2015;14(15):377-387. Available from: https://sid.ir/paper/177732/en

IEEE: Copy

SASAN RAHMANIAN, and MOHAMADREZA GHAZAVI, “ANALYSIS OF LUBRICANT EFFECT ON STABILIZING THE DYNAMIC BEHAVIOR OF SLIDER-CRANK MECHANISM WITH REVOLUTE JOINT CLEARANCE,” MODARES MECHANICAL ENGINEERING, vol. 14, no. 15, pp. 377–387, 2015, [Online]. Available: https://sid.ir/paper/177732/en

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