On the Limitations of Predictions of the Dynamic Response of Machines with Clearance Connections

Abstract

The results of experimental and analytical studies of the dynamic response of machines with flexible links and connection clearances are presented. These results suggest that both a large amount of variability and high sensitivity to small parameter changes and operating conditions are inherent properties of the dynamic response of such systems. This work indicates that the accuracy of dynamic force predictions given by computer simulations for such systems may be fundamentally limited, and therefore such simulations should be used with care in system design.

A comprehensive survey of the analytical, numerical and experimental methodologies for dynamics of multibody mechanical systems with clearance or imperfect joints

“…In their model, springs and dashpots were arranged as Kelvin-Voigt model [78,79]. This approach, valid for frictionless and unlubricated joints, was subsequently extended by Dubowsky and his co-workers [113][114][115][116][117]. Dubowsky [118] demonstrated that a simple impact could significantly affect the dynamic characteristics of mechanical systems with clearances.…”

Parametric kinematic tolerance analysis of general planar systems

“…Dynamical tolerance analysis is another important research project. Previous research has studied the dynamical effects of Ilxcd part variations [5]. 'vVe aim to gcncralillc the analysis to parametric families of part variations.…”

Non-smooth mechanical systems — an overview

“…Results are given by Prestl [69], Fritzer [11] as well as in [56]. Further applications are impacts of heat exchanger tubes, Whiston [87], Goyda, Teh [14], and clearance connections in high speed machinery, Szczygielski [82], Deck, Dubowsky [7]. Figure 3.5 shows the classical impact oscillator.…”