Original scientific paper

https://doi.org/10.17559/TV-20131023220214

Probabilistic behaviour of joints on joint forces in mechanisms

Boštjan Harl ; University of Maribor, Facutly of Mech. Eng., Smetanova 17, 2000 Maribor, Slovenia
Nenad Gubeljak ; University of Maribor, Facutly of Mech. Eng., Smetanova 17, 2000 Maribor, Slovenia
Marko Kegl ; University of Maribor, Facutly of Mech. Eng., Smetanova 17, 2000 Maribor, Slovenia

Abstract

This paper discusses the influence of the clearance in joints on the joint reaction forces in mechanisms. By using mathematical programming, the optimal parameters of kinematic chains can be efficiently obtained by using the deterministic approach. However, the situation becomes more sophisticated if random effects of tolerances of the arm lengths and the random pin positions have to be considered. In this work the influence of clearances on joint forces is calculated by using the Taylor approximation and the Monte Carlo method. The implementation of the model is illustrated with two examples. The first example considers a closed loop chain, representing a four-bar mechanism being an actual part of a hydraulic support, employed in mining industry. The second example considers joint reaction forces of car wiper mechanism.

Keywords

joint forces; kinematic chain; mathematical programming; stochastic model

Hrčak ID:

135071

URI

https://hrcak.srce.hr/135071

Publication date:

23.2.2015.

Article data in other languages: croatian

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