Control of status of welded joints of structural members of transport machines
Journal Title: Технічна механіка, Техническая механика, Technical Mechanics - Year 2016, Vol 1, Issue 1
Abstract
The work objective is to create the tools method for controlling a technical status of the mechanical mem-bers of the vehicle parts of railway locomotives using a criterion for fatigue cracking through their welded joints. The on-board measuring complex for dynamic and structural running tests of the structural member of the DS3 electric locomotive, the computer simulation of a stressed-strained state of a welded joint, the strain-measuring null-indicator method of detection of fatigue cracks have been employed. The paper presents the results of dynamic and structural running tests of a welded joint of a damper plate for a suspension axle box stage and a side-frame of the DS3 electric locomotive bogie obtained by an on-board strain- measuring complex. It is found that fatigue cracking through the welded joint results from the defect of a leg at the site of initiation of maximal tensile stresses, a supernumerary work of a hydraulic damper of the suspen-sion axle box stage. Using the computer simulation of a stressed-strained state of the welded crack-free joint with the fatigue crack of a semi-elliptic form, the capability of its detection prior to critical dimensions at the inacces-sible site of the structural member with our strain-measuring null indicator method is demonstrated. Conclusions about the verification of the quality of repair of welded joints of the mechanical members for the vehicle parts of railway locomotives under real operational conditions without fatigue cracking are made.
Authors and Affiliations
V. Leonets, A. Lukashevych
Keywords
Related Articles
- EP ID EP349642
- DOI -
- Views 90
- Downloads 0
On models of ergative system software reliability
The aim of this work is to analyze models of the reliability of the ergative system software component and to develop approaches to the assurance thereof. Software reliability models are analyzed, and the features of sof...
Combined use of random search methods and gradient methods in the optimization of rocket design parameters and control programs
The aim of this paper is to develop a methodology for optimizing, at the initial design stage, the key charac-teristics of a rocket with a solid-propellant sustainer engine which can follow a ballistic, an aeroballistic,...
Analysis of technologies for spacecraft removal from low earth orbits using onboard-produced electromagnetic and magnetic fields
The aim of this paper is to analyze the effectiveness of propulsion devices with permanent magnets as an alternative space debris deorbit system for low earth orbits. The paper considers current problems in the developme...
Special features of deceleration of a supersonic flow through convergent channel
A numerical simulation of the gas dynamic parameters of a supersonic flow in decelerating through a varia-ble-section channel is carried out in the context of a viscous layer model. The capability of applying a marching...
Analysis of use of aerodynamic systems to deorbit modular large-sized space objects from low near-earth orbits
This paper deals with the analysis of the feasibility of aerodynamic deorbiting systems (ADS) to deorbit modular large-sized space objects (MLSO) from low earth orbit. The objective of this paper is to study the feasi-bi...