Open AccessAbout one method for replacing variables for a wavean equation describing vibrations of systems with moving boundaries
Author(s) -
В. Н. Анисимов,
В. Л. Литвинов
Publication year - 2020
Publication title -
žurnal srednevolžskogo matematičeskogo obŝestva
Language(s) - English
Resource type - Journals
eISSN - 2587-7496
pISSN - 2079-6900
DOI - 10.15507/2079-6900.22.202002.188-199
Subject(s) - mathematics , mathematical analysis , boundary value problem , inverse problem , invariant (physics) , wave equation , boundary (topology) , inverse , equations of motion , vibration , range (aeronautics) , classical mechanics , physics , geometry , materials science , quantum mechanics , composite material , mathematical physics
An analytical method for solving the wave equation describing the oscillations of systems with moving boundaries is considered. By replacing variables that set boundaries and leave the equation invariant, the original boundary value problem is reduced to a system of functional – difference equations that can be solved using forward and reverse methods. The inverse method is described, which allows us to apply sufficiently diverse laws of boundary motion to the laws obtained from the solution of the inverse problem. New partial solutions for a fairly wide range of boundary motion laws are obtained. A direct asymptotic method for approximating the solution of a functional equation is considered. The errors of the approximate method are estimated depending on the speed of the border movement.