Open AccessDOI
Bilateral Analytical Estimation of the First Frequency of a Plane Truss
Oleg Vladimirovich Vorobev
- Vol. 92, Iss: 7, pp 9204-9204
TLDR
In this paper, the vertical displacement of nodes is derived from the Maxwell-Mohr method with the premise of linear elasticity, and Dunkerley's and Rayleigh's estimations of primary truss frequency on the number of panels are deduced from the inductive analysis of the set of particular trusses with an increasing number of columns.Abstract:
The object of research is the statically determinate cantilever truss. The trass consists of rectangular panels with downward diagonal beams. The truss has two supports, one of which is fixed hinged, and another one is roller support. Masses are located in the nodes of top and bottom chords. Forces in the bars and reactions at supports are determined using the method of joint isolation. The vertical displacement of nodes is derived from the Maxwell-Mohr method with the premise of linear elasticity. Dependence of vertical displacement, Dunkerley’s and Rayleigh’s estimations of primary truss frequency on the number of panels is deduced from the inductive analysis of the set of particular trusses with an increasing number of panels. Recurrence equations that meet particular coefficients are derived using special functions of the computer algebra system Maple. Obtained solutions are polynomial, with the number of panels as variables. Rayleigh’s quotient is calculated with the assumption that the first mode of vibration is equal to truss deflection under the uniformly distributed load. Graphs of the dependencies of obtained estimations on nodes masses, the number of panels, stiffness, and size of the truss are plotted.read more
Citations
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Analytical Dependence of Deflection of the Lattice Truss on the Number of Panels
TL;DR: In this article, the authors derived the analytical dependence of the deflection of a truss on the number of panels, and the coefficients of the final formula are obtained from the solution of linear homogeneous recurrent equations found from the analysis of the sequence of solutions for trusses with different numbers of panels.
Journal ArticleDOI
Minimum Weight Optimal Design of Truss Structure with Frequency Response Function Constraint
D. Wang,Wenjian Xu +1 more
TL;DR: In this paper, the dynamic sizing optimization problem of a truss structure for its weight minimization with a constraint of the frequency response function (FRF) over a certain frequency band was studied.
Journal ArticleDOI
Calculating model of a frame type planar truss having an arbitrary number of panels
TL;DR: In this article, a planar statically-determinate elastic truss with a horizontal bolt, lateral supporting trusses and a cross-shaped grid under the action of various types of static loads is analyzed.
Journal ArticleDOI
One feature of the constructive solutions of the lattice girder
TL;DR: In this paper, the deflection of a planar symmetric statically determinable truss with a double lattice depending on the number of panels was solved in an analytical form.
Journal ArticleDOI
The lower limit of the first frequency of natural vibrations externally statically indeterminate truss: analytical solution
TL;DR: In this article, a statically determinate planar truss with two additional supports duplicating the main ones is proposed, and the formula for the dependence of the lower estimate of the first natural frequency on the number of panels is obtained.
References
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Analytical Dependence of Deflection of the Lattice Truss on the Number of Panels
TL;DR: In this article, the authors derived the analytical dependence of the deflection of a truss on the number of panels, and the coefficients of the final formula are obtained from the solution of linear homogeneous recurrent equations found from the analysis of the sequence of solutions for trusses with different numbers of panels.
Journal ArticleDOI
Analytical calculation of the deflection of an externally statically indeterminate lattice truss
TL;DR: In this paper, a scheme of a statically definable truss with additional supports is proposed, where the dependence of the deflection of the truss against the number of panels for three types of symmetrical loads is derived.
Journal ArticleDOI
Minimum Weight Optimal Design of Truss Structure with Frequency Response Function Constraint
D. Wang,Wenjian Xu +1 more
TL;DR: In this paper, the dynamic sizing optimization problem of a truss structure for its weight minimization with a constraint of the frequency response function (FRF) over a certain frequency band was studied.
Journal ArticleDOI
Slow-fast dynamics in the truss core sandwich plate under excitations with high and low frequencies
TL;DR: In this paper, the authors analyzed the slow-fast motions in a two degrees of freedom model under slow parametric and fast external excitations using analytical and numerical methods, and they obtained the averaged equations which govern the slow dynamics for different magnitudes of external amplitude.
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