Authors: I.P. Popov, D.M. Dubinkin

Title of the article: Development of a criteria for assessing the parameters of cross-sections of frame longitudinal beams of mining dump truck

Year: 2026, Issue: 4, Pages: 121-127

Branch of knowledge: 2.8.8. Geotechnology, Mining machines (engineering)

Index UDK: 622.684

DOI: 10.26730/1816-4528-2026-4-121-127

Abstract: To improve the reliability and efficiency of heavy-duty dump trucks that are operated under high static and dynamic loads, it is necessary to evaluate the parameters of the frame elements of dump trucks at the design stage. The purpose of the study is to develop and substantiate rational cross-sections of spars for the frames of mining dump trucks. The frame of a mining dump truck is a highly loaded load-bearing system that absorbs bending and torsion, while the rational choice of the geometric parameters of the longitudinal beams and cross members determines the service life and metal consumption of the structure. It is established that the typical section of the spar is a closed box-shaped profile formed by horizontal shelves and vertical walls of different thicknesses, working mainly on transverse bending. The paper proposes a criterion-based approach to estimating the cross-section parameters of frame elements based on the conditions of equal strength and constant mass. A parametric analysis was performed to quantify the parameters of the section of the spar from the ratio of the thickness of horizontal and vertical sheets. For the box spar profile, the optimal ratio of flange to wall thickness k = tп/tс = 2 has been established, providing the maximum moment of resistance to bending at an acceptable level of tangential stresses. This value provides an increase in the moment of bending resistance by 20% while maintaining mass or a decrease in metal consumption by 19.6% while maintaining strength, while the increase in tangential stresses in the wall (54%) remains within acceptable limits. The developed criteria make it possible to reasonably reduce the metal consumption of the frame without loss of load-bearing capacity and can be used at the design stage of mining dump trucks.

Key words: mining dump truck frame crossmember longitudinal beam section parameters torsional modulus bending modulus

Receiving date: 03.07.2026

Approval date: 12.06.2026

Publication date: 27.08.2026

CITE DOWNLOAD