Features of propagation and recordingof the stress waves in plates of finite thickness

• Main Author: Cherednichenko Rostislav Andreevich
• Format: Article
• Language: English
• Published: Moscow State University of Civil Engineering (MGSU) 2014-02-01
• Series: Vestnik MGSU
• Subjects: stress; compression wave propagation; shifts; difference method; photoelasticity; plane problem; axisymmetric problem
• Online Access: http://vestnikmgsu.ru/files/archive/issues/2014/2/ru/8.pdf

This work was carried out to study at the same time the dynamics of wave propagation in plane and axisymmetric plates by finite-difference numerical calculation and by the method of dynamic photoelasticity.In many cases it is possible to carry out the investigation of the dynamic stressed state of solid structures under the impact of seismic waves in plane statement, observing the foundation and the building itself in the conditions of plane deformation. Such problems in structural mechanics are usually investigated on plates providing the conditions of generalized plane stressed condition and accounting for the necessity of the known substitution of elastic constants. In case of applying the model of generalized plane stressed state for investigating two-dimensional waves’ propagation in three-dimensional elastic medium it may be necessary to observe certain additional conditions, which for example limit the class of external impacts of high frequencies (short waves). The use of candling for wave recording in plane models explored with the method of dynamic photoelasticity in the observed cases of impulse loading of the plates with finite thickness gives satisfactory results.