Numerical Investigation of the Vertical Dynamics of an Agricultural Vehicle Operating on Deformable Soil Politecnico di Milano

Format:

Conference/Event

Author/Creator:

Negrini, Negrini, author.

Contributor:

Braghin, Francesco

melzi, stefano

Sabbioni, Edoardo

Conference Name:

SAE 2012 World Congress & Exhibition (2012-04-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

This work focuses on the analysis of the vertical dynamics of an agricultural tractor, investigating the influence of suspensions' parameters on riding comfort and contact forces. The use of lugged tires coupled with the operation over banked, irregular and deformable tracks, determines significant levels of vertical acceleration over several components of the tractor. These operating conditions have a direct effect on the driver, whose alertness and efficiency are undermined by the exposure to high levels of acceleration for a long time. Secondly, variations of the normal and traction forces provided by the tires affect the quality of tillage and other operations. The paper presents a multi-body vehicle model of a tractor interfaced with a tire-soil contact model allowing to take into account soil's deformation and tread pattern design. The proposed model was used to perform a numerical analysis of a commercial tractor equipped with two different sets of commercial tires, performing tillage operations on a deformable soil; the analysis aimed at optimizing the suspensions' parameters: in particular damping of seat, cabin and front suspensions were changed to determine the possible improvement with respect to the nominal configuration

Notes:

Vendor supplied data

Publisher Number:

2012-01-0764

Access Restriction:

Restricted for use by site license