Open AccessDynamics of the System Intended for Destruction of Buildings and Constructions by a Shock Method
Author(s) -
В. А. Наумов,
Н. Л. Великанов
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/753/2/022027
Subject(s) - dimensionless quantity , mechanics , kinetic energy , relative velocity , ball (mathematics) , shock (circulatory) , structural engineering , classical mechanics , physics , engineering , geometry , mathematics , medicine
The article deals with the dynamics of the system intended for destruction of objects by the shock method. The working organ is a spherical body suspended by a rope on a crane boom. The ball is considered to be absolutely solid. All the potential energy of the ball is converted into kinetic energy before impact. Geometric and energy conditions of interaction are obtained. The boundaries of the parameter region in which the ball touches the wall are presented. The dependences of the normal and tangential velocity before impact on the relative cable length are obtained. In the first stage, the flat rough wall does not deform on impact. The dependence of the dimensionless ball speed of the center of mass and angular velocity after impact on the relative length of the cable are presented. An increase in the dimensionless distance to the wall leads to a decrease in the kinetic energy losses of the ball and an increase in the normal dimensionless shock pulse. The algorithm and graphics allow in the process of developing projects for the demolition of buildings and structures to make a choice of technological parameters that ensure the effective operation of construction equipment.