Investigation of Parametric Vibration Stability in Slider-Crank Mechanisms with Elastic Coupler


An analytical model for investigating parametric vibration stability of slider-crank mechanisms with flexible coupler is presented. The continuous model is formulated to account for initial curvature as well as internal material damping in the coupler. The governing partial differential equations are reduced to a system of ordinary differential equations in terms of the time-dependent modal coefficients. Floquet theory is employed to determine the effects of geometric stiffening as well as relative component mass on parametric stability of mechanism response. Results indicate the existence of instability regions due to combination resonances of various modes. In addition, the stability characteristics of the mechanism is found to improve when slider forces are directed away from the crank-ground pin (i.e. the connecting rod is in tension), and when a relatively smaller slider mass is used.

Meeting Name

1991 ASME Design Technical Conference presented at the 13th Biennial Conference on Mechanical Vibration and Noise


Mechanical and Aerospace Engineering

Keywords and Phrases

Elasticity; Mathematical Models; Mathematical Techniques-Differential Equations; Vibrations-Stability

Document Type

Article - Conference proceedings

Document Version


File Type





© 1991 American Society of Mechanical Engineers (ASME), All rights reserved.

Publication Date

01 Jan 1991

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