ABSTRACT: In this paper, the forced three-dimensional vibrations of a machine unit mounted on the wagons of the electric modular trains are studied. The unit is suspended on three vertical supports to the wagon frame. A vibrating isolation assembly is constructed at the top end of each carrier. The unit is accepted as an ideal […]
ABSTRACT: Vibrations resulting from powertrain work and auxiliary equipment reduce the comfort, reliability, and durability of the vehicles. The vibration levels transmitted to the passenger compartment and the emitted structural noise depend mainly on the efficiency of their vibration isolation with respect to the vehicle body. The work presents an experimental determination of the vibration
A10: Experimental Determination of Vibration Levels of Electric Compressor Aggregate Read More »
International Jubilee Scientific Conference “75 years UACG“, 1-3 November 2017, Sofia, BULGARIA https://1drv.ms/b/c/b9f980bbcaa2448f/IQBUhXlVz02oQofuSHndJ3GcAQdhy-DdWjmz9xDJiYhRyKs?e=o0iVan
PR07: Asymmetrical Rigid Body Motion in Fluid Area Read More »
International Jubilee Scientific Conference “75 years UACG“, 1-3 November 2017, Sofia, BULGARIA https://1drv.ms/b/c/b9f980bbcaa2448f/IQB7wi49SAfDSpj9vLMctqTmATMBz53U0itSoPjwK1cs8mY?e=hii0cE
PR06: Motion of Ellipsoid in Fluid Area Read More »
Todor Kableshkov University of Transport, 12-14 October 2017, Sofia, BULGARIA https://1drv.ms/b/c/b9f980bbcaa2448f/IQB5JbjZgKkMTZT4QpqoYF9MAadqIAAiotuqjNB8wh5bCjU?e=ghi6Ah
Todor Kableshkov University of Transport, 12-14 October 2017, Sofia, BULGARIA https://1drv.ms/b/c/b9f980bbcaa2448f/IQA8Ocmnf5VZSK42VKBV-NVUAcC4XWLqFiu6BarnzGJc1ZI?e=wdd7iX
ABSTRACT: The article examines the general motion of a homogeneous solid body in a fluid medium. The body is an ellipsoid with three mutually perpendicular planes of geometric and material symmetry. The intersections of these planes with the ellipsoid represent three ellipses of different sizes. The body is assumed to have six degrees of freedom.
A09: Motion of Ellipsoid in Fluid Area Read More »
ABSTRACT: The article examines the general motion of an arbitrarily asymmetric homogeneous rigid body in a fluid medium. Through a defined new theorem – Theorem for change of the generalized momentum of a rigid body, and new Lagrange equations in structure, called Condensed Lagrange equations, the differential equations describing the spatial movement of the body
A08: Motion of Asymmetrical Rigid Body in Fluid Area Read More »
ABSTRACT: In this paper, a pseudo translational motion of a free asymmetrical rigid body into an absolute reference system is studied. A private kind of Theorem of change of generalized body impulse is formulated. This theorem is called the Theorem of change of pseudo generalized body impulse. A private kind of Condensed Lagrange equation in
A07: Theoretical Matrix Study of Rigid Body Pseudo Translational Motion Read More »
ABSTRACT: In this paper, a general motion of the free asymmetrical rigid body to an absolute coordinate system is studied. The rotating component of body motion is described by using Cardan angles. A new kind of theorem is formulated. It is called the Theorem of change of generalized body impulse. New kinds of differential Lagrange
A06: Theoretical Matrix Study of Rigid Body General Motion Read More »
ABSTRACT: The small free three-dimensional vibrations of an asymmetrical rigid body connected with elastic elements and specialized dampers in this paper are studied. The influence of the arbitrary chosen coordinate system on the system of differential equations was determined. It has been shown that such a selected coordinate system can not be used to obtain the
CP06: Free Three-Dimensional Vibrations of Rigid Body Read More »
University of Structural Engineering and Architecture “Lyuben Karavelov”, Sofia, BULGARIA, 1-3 November 2017 https://1drv.ms/b/c/b9f980bbcaa2448f/IQCrxiLfBdOUSp_CjpkvB6MoAY1jvU6AYNZjEWfXwI530iQ?e=IBkSgS
PR03: Seismic Forces for Rigid Body Supported on Elastic Elements Read More »
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 »
University of Structural Engineering and Architecture “Lyuben Karavelov”, Sofia, BULGARIA, 1-3 November 2017 https://1drv.ms/b/c/b9f980bbcaa2448f/IQC_TldTzs-QTZmKmjJEwGWfAUSQ6u1vbHLhAzp8_Ra8u-E?e=aoFzZo
PR02: Free Three-Dimensional Vibrations of Rigid Body 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
