Reduced order modeling of preloaded bolted structures in multibody systems by the use of trial vector derivatives

[+] Author and Article Information
Florian Pichler

University of Applied Sciences Upper Austria Stelzhamerstraße 23, 4600 Wels, Austria

Wolfgang Witteveen

University of Applied Sciences Upper Austria Stelzhamerstraße 23, 4600 Wels, Austria

Peter Fischer

Graz University of Technology - Institute of Automotive Engineering Inffeldgasse 11/II, 8010 Graz, Austria

1Corresponding author.

ASME doi:10.1115/1.4036989 History: Received February 06, 2017; Revised May 24, 2017


In order to achieve a correct representation of jointed structures within multibody dynamic simulations an accurate computation of the nonlinear contact and friction forces between the contact surfaces is required. In recent history trail vectors based on trial vector derivatives, so-called joint modes, have been presented which allow an accurate and efficient representation of this joint contact. In this paper a systematic adaption of this method for preloaded bolted joints is presented. The new strategy leads to a lower number of additional joint modes required for accurate result and hence to lower computational time. Further a major reduction of the computational effort for joint modes can be achieved. The potential and also possible limitations of the method are investigated using two numerical examples of a preloaded friction bar and a bolted piston rod bearing cap.

Copyright (c) 2017 by ASME
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