Keyword: «resonant stress and strain peaks»

A methodology for studying the stress-strain state of track sections has been developed. This methodology utilizes both static and modal analysis, as well as harmonic analysis, using the finite element method. The feasibility of comparative analysis of changes in the dynamic parameters of the stress-strain state of track elements at different temperatures is demonstrated.

We propose a method for solving problems of large-scale mineral extraction by creating four simplified, scaled-down (20,000 times smaller) finite element models of the Earth, each containing a core, mantle, and a relatively thin, continuous crust. In the second model, a spherical excavation extending to the mid-depth of the Earth's crust is made near the North Pole. In the third model, a similar excavation is made near the equator. In the fourth model, two such excavations are made near the pole and the equator. These excavations simulate the global extraction of raw materials at these locations. Static, modal, and harmonic analyses of the models are then conducted, and the impact of global resource extraction on changes in the static and dynamic strength characteristics of the models under consideration is assessed.