Experimental Determination of the Moments of Inertia of the Parts of the Body About Axes Through the Centre of Gravity and at Right Angles to the Longitudinal Axis, and About the Longitudinal Axis Itself

In order to reduce the cost of designing and manufacturing of the new-generation open wagons, it is proposed to construct their carrying systems from round pipes. In order to exploit the proposed designs of wagons in international rail-water communication, it is assumed that they will be equipped with assemblies for fastening of chain binders. The maximal values of accelerations, as components of dynamic load acting on open wagons, made from round pipes during their transportation on a railway ferry, are determined. It is established that when moving the body in the vertical direction for a wagon located on the upper deck, the maximum acceleration value is 0.84g, with angular displacement relative to the transverse axis for the extreme from the anchor point of the wagon body - is 0.1 g, with angular displacement around the longitudinal axis for the extreme from the bulwark of the body of the wagon - is 0.24g. The conducted researches will enable increased efficiency of operation of open wagons through international transport corridors.

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Experimental Determination of Moments of Inertia by the Bifilar Pendulum Method

American Journal of Physics ◽

10.1119/1.1976385 ◽

1970 ◽

Vol 38 (4) ◽

pp. 537-539 ◽

Cited By ~ 6

Author(s):

John W. Then ◽

Kang-rong Chiang

Keyword(s):

Experimental Determination ◽

Moments Of Inertia

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Experimental Determination of Moments of Inertia for an Off-Road Vehicle in a Regular Engineering Laboratory

International Journal of Mechanical Engineering Education ◽

10.7227/ijmee.34.4.2 ◽

2006 ◽

Vol 34 (4) ◽

pp. 291-314 ◽

Cited By ~ 8

Author(s):

P. E. Uys ◽

P. S. Els ◽

M. J. Thoresson ◽

K. G. Voigt ◽

W. C. Combrinck

Keyword(s):

Experimental Determination ◽

Road Vehicle ◽

Moments Of Inertia

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Experimental Determination of the Isostatic Lines

Journal of Applied Mechanics ◽

10.1115/1.4009224 ◽

1942 ◽

Vol 9 (4) ◽

pp. A155-A160 ◽

Cited By ~ 1

Author(s):

Augusto J. Durelli

Keyword(s):

Experimental Determination ◽

Tensile Strain ◽

Direct Method ◽

The Body ◽

Principal Stresses ◽

Maximum Tensile Strain ◽

Geometrical Form ◽

Yield Values ◽

A Direct Method

Abstract In this paper a direct method for obtaining the isostatics or stress trajectories is described. These lines indicate the directions of the principal stresses. The procedure used by the author can be applied almost without regard to the geometrical form of the object under stress. It also possesses the advantage in that the test is nondestructive and that in most cases it will yield values of the stress magnitudes within 10 or 15 per cent of the correct values. The technique consists in covering the surface of the body with a thin coat of lacquer which becomes brittle upon hardening. If the object being tested is painted under zero load and then stressed after the coating has hardened, the layer of lacquer will crack along lines perpendicular to the maximum tensile strain. The companion set of trajectories at right angles can usually be formed through relaxation. As an aid in photoelasticity this procedure has great possibilities as it eliminates the necessity for determining the isoclinic lines which are difficult to obtain.

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Technics for experimental determination of CubeSat mass-centering and inertial characteristics

Space engineering and technology ◽

10.33950/spacetech-2308-7625-2021-3-83-95 ◽

2021 ◽

pp. 83-95

Author(s):

Igor V. BELOKONOV ◽

Elena V. BARINOVA ◽

Vitaly N. KLYUCHNIK ◽

Alexander V. IVLIEV ◽

Elisey A. BOLTOV

Keyword(s):

Initial Data ◽

Experimental Determination ◽

Key Words ◽

Theoretical Calculations ◽

Center Of Mass ◽

High Accuracy ◽

Design Parameters ◽

Moments Of Inertia ◽

Series Of Experiments

Due to inability to set a high accuracy of initial data in theoretical calculations of mass-centering and inertial characteristics of nanosatellites, a problem arises concerning the experimental determination of their actual values. For a number of reasons, the devices designed for large spacecraft are not appropriate for small ones. This paper describes a device for measuring the center of mass coordinates and moments of inertia developed at Samara University specifically for CubeSat nanosatellites, as well as a technology for experimental determination of the design parameters of nanoclass spacecraft. The accuracy of determining the design parameters using the proposed device is confirmed by a series of experiments with standards. Key words: nanosatellite, center of mass coordinates, moment of inertia, inertia tensor, measuring platform.

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