Conference Papers

ABSTRACT: In practical engineering is required to provide seismic protection of a rigid body, connected with one or more elastic elements. This task falls a little aside from structural mechanics, which deals mainly with seismic protection of structures and buildings. The rigid body has six degrees of freedom. Seismic forces and moments are obtained in the …

CP05: Seismic Forces for Rigid Body Supported on Elastic Elements Read More »

ABSTRACT: In this paper, the free three-dimensional vibrations of a rigid body connected with elastic and damping elements are discussed. The task of determining the Eigen values and Eigen vectors is solved. According to the degree of damping, their variation is monitored. This task also solves the problem of determining the natural frequencies and the oscillation …

CP04: Influence of Dissipation in the Study of Free Three-Dimensional Vibrations of Rigid Body Read More »

ABSTRACT: Free three-dimensional vibrations of a nonsymmetrical rigid body on an elastic ground: This paper describes a free three-dimensional vibration of a nonsymmetrical rigid body on an elastic ground. The body has six degrees of freedom. The elastic ground by three coefficients of elasticity is determined. A system of differential equations, which are described the …

CP03: Free Undamped Three-Dimensional Vibrations of an Unsymmetrical Rigid Body on an Elastic Foundation Read More »

ABSTRACT: The investigations of structural constructions, which are put under dynamical excitations, by using dynamical matrices are done for models, which have many degrees of freedom. But the most real structural constructions have hysteretic damping, which is modeled as viscous damping. This fact makes the investigations more difficult. It is necessary to be used more …

CP02: Dynamical Matrices with Considering the Resistance Read More »

ABSTRACT: The investigations of structural constructions, which are put under dynamical excitations, by using dynamical coefficients are possible only for mechanical systems with one degree of freedom. That is why, to a certain extent, using of this method is limited. The most real structural constructions have many degrees of freedom. The dynamical coefficients are modified …

CP01: Dynamical Matrices without Considering the Resistance Read More »