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Some guidance in the designing of a roller for the automotive testers

Angelov Y., Draganov I.

Transport Problems

2018

T. 13, z. 3

97--108

This work presents some aspects related to the designing of a roller for stands that are intended to determine the parameters of the transmission of a vehicle, such as braking force, wheel revolutions, etc. The computational scheme of simply supported beam is used to create an analytical mechanical-mathematical model through which a multicriteria optimization problem has been solved. A finite element macro and submodel of the roller has been created, and by using the R1MS technique, the fatigue strength in the welding seams in the roller has also been determined. A parametric analysis is accomplished to determine the influence of the thickness of the base steel and the covering ebonite layer on the perimeter change of the outer surface, taking into account the physical non-linearity of the outer layer.

Multiciteria optimization of metal cutting machine's main drive

Angelov Y.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

2010

z. 80 [274]

7-12

A parametric optimization problem is formulated for the metal cutting machine main drive as a multicriteria nonlinear optimization problem of robust dynamical system. A mathematical model determining amplitude-frequency characteristics of tortional forced-vibrations of the main drive is developed. An assessment system of the vibrational stability is presented. A procedure determining the unique Pareto optimal solution by means of direct approach and a compromising scheme based on the concept of the "utopical" point in the criteria space and procedure for a "µ-selection" are utilized for approximatelly solving the formulated problem. An example which considers the parametric optimization for the main drive of CNC machine CE063 is included.