MODE OF ASSESSMENT OF WORKING COMPATIBILITY OF TWO-PLY WOODEN CONSTRUCTION OF BAR TYPE Russian patent published in 2005 - IPC

FIELD: the invention refers to the field of construction and is intended for assessment of working compatibility of two-ply construction of a bar type.

SUBSTANCE: the invention is in that that to each layer of a compound bar a linear load of wood-pulp is cc-calculated. The moments of inertia of their sections are computed. The moment of inertia for the whole section of the compound bar as all-wood is calculated. Experimentally the basic frequencies of free fluctuations of each layer are determined. The basic frequency of fluctuations of the compound bar is determined. The coefficient of decreasing of rigidity of the compound bar is calculated according to the formula

where w- the frequency of vibrations of the basic tone of the compound bar;w₁ and w_{2 -} frequencies of vibrations of the basic tone of each layer of the compound bar as an independent construction;m₁ and m_{2 -} linear loads of wood-pulp of each layer of the compound bar;I₁ and I₂ - the moments of inertia of sections of the compound bar as all-wood;I₅ - the moment of inertia of the compound bar as all-wood.

EFFECT: simplifies realization of the mode and decreases its labor-intensiveness.

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