On the paradox of the destabilizing effect of damping in non-conservative systems

 
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1992 (EN)
On the paradox of the destabilizing effect of damping in non-conservative systems (EN)

Kounadis, AN (EN)

N/A (EN)

The nature of the critical states of a follower-type non-conservative elastic system with or without damping, is reexamined using a non-linear dynamic analysis. It is found that the destabilizing effect due to certain ratios of damping coefficients, regarded for a long time as a ""paradox"", is associated with globally stable critical states. However, in the case of equal damping coefficients, the increase of damping increases the critical load (stabilizing effect). It is also established that this system is statically and dynamically stable for the entire region of variation of the non-conservativeness load parameter, contrary to existing analyses. Moreover, it is deduced that the critical states corresponding to both types of instability may become unstable if a slight material non-linearity is included; then, the mechanism of divergence and flutter instability change from stable to unstable and vice versa for a critical value of the material non-linearity which depends on the non-conservativeness loading parameter. © 1992. (EN)

journalArticle

Destabilizing Effect (EN)
Damping (EN)
Stability (EN)
Nonlinear Equations (EN)
Variation Region (EN)
Elasticity (EN)
Equations of Motion (EN)
Damping Coefficients (EN)
Nonconservative Elastic System (EN)
Dynamic Response (EN)
Linearization (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

International Journal of Non-Linear Mechanics (EN)

1992


PERGAMON-ELSEVIER SCIENCE LTD (EN)



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