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Abstract

The paper presents a model for dynamic analysis of belt transmission. A two dimensional discrete model was assumed of a belt consisting of rigid bodies joined by translational and torsion spring-damping elements. In the model, both a contact model and a dry friction model including creep were taken into consideration for belt-pulley interaction. A model with stiffness and damping between the contacting surfaces was used to describe the contact phenomenon, whereas a simplified model of friction was assumed. Motion of the transmission is triggered under the influence of torque loads applied on the pulleys. Equations of motion of separate elements of the belt and pulleys were solved numerically by using adaptive stepsize integration methods. Calculation results are presented of the reaction forces acting on the belt as well as contact and friction forces between the belt body and pulley in the sample of the belt transmission. These were obtained under the influence of the assumed drive and resistance torques.

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Authors and Affiliations

Krzysztof Kubas
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Abstract

The objective of this paper is to present a method of dynamic analysis of the steering system of a passenger car with McPherson suspension. The links of the system are modelled as rigid bodies; however, the method enables flexibility of the steering shaft of the car to be taken into account. The geometry of the system is described by using homogenous transformations. Equations of motion are derived on the basis of the Lagrange equations. In the method proposed, the closed loop oflinks is cut at selected joints and suitable reaction forces are introduced. Dry friction occurring in the steering system is reduced to the prismatic joint between the steering rack and guide. The method can be used in design and optimization of steering systems of passenger cars with McPherson suspension.
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Authors and Affiliations

Andrzej Harlecki
Iwona Adamiec-Wójcik
Krzysztof Kubas

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