Adaptive-spectral method of monitoring and diagnostic observability of static stresses of elements of mechanical constructions

Innovations and Prospects of Development of Mining Machinery and Electrical Engineering

矿业工程;电工学

Sedov, A.V.^1,2 ; Kalinchuk, V.V.^1 ; Bocharova, O.V.^1

Southern Scientific Centre, Russian Academy of Sciences, 41, Chehova St., Rostov-on-Don

344006, Russia^1

Platov South-Russian State Polytechnic University (NPI), 132, Prosveschenia St., Novocherkassk, Rostov Region

346428, Russia^2

关键词: Controlled environment;    Mechanical construction;    Mechanical structures;    Monitoring and diagnostics;    Operative control;    Spectral decomposition;    Spectral methods;    Wave properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/87/8/082043/pdf
DOI  :  10.1088/1755-1315/87/8/082043

来源: IOP

【 摘 要 】

The evaluation of static stresses and strength of units and components is a crucial task for increasing reliability in the operation of vehicles and equipment, to prevent emergencies, especially in structures made of metal and composite materials. At the stage of creation and commissioning of structures to control the quality of manufacturing of individual elements and components, diagnostic control methods are widely used. They are acoustic, ultrasonic, X-ray, radiation methods and others. The using of these methods to control the residual life and the degree of static stresses of units and parts during operation is fraught with great difficulties both in methodology and in instrumentation. In this paper, the authors propose an effective method of operative control of the degree of static stresses of units and parts of mechanical structures which are in working condition, based on recording the changing in the surface wave properties of a system consisting of a sensor and a controlled environment (unit, part). The proposed method of low-frequency diagnostics of static stresses presupposes adaptive-spectral decomposition analysis of a surface wave created by external action (impact).