Natural Frequency Spectrum and Fundamental Frequency Formula for Plane Periodic Lattice Truss
- Авторлар: Kirsanov M.N.1
-
Мекемелер:
- National Research University “MPEI”
- Шығарылым: Том 21, № 2 (2025)
- Беттер: 108-117
- Бөлім: Analytical and numerical methods of analysis of structures
- URL: https://journals.rcsi.science/1815-5235/article/view/325916
- DOI: https://doi.org/10.22363/1815-5235-2025-21-2-108-117
- EDN: https://elibrary.ru/NJOXAL
- ID: 325916
Дәйексөз келтіру
Толық мәтін
Аннотация
The goal is to determine the free vibration natural frequency spectrum for a plane statically determinate truss with a cross-shaped lattice. The truss members are elastic and have the same stiffness. Both truss supports are pinned; the truss is externally statically indeterminate. A model, in which the mass of the structure is uniformly distributed over its nodes, and their vibrations occur vertically, is considered. The Maxwell-Mohr method is used to determine the stiffness of the truss. The member forces included in the formula are calculated by the method of joints using the standard operators of Maple mathematical software in symbolic form. The eigenvalues of the matrix for trusses with different numbers of panels are determined using the Maple system operators. Spectral constants are found in the overall picture of the frequency distribution constructed for trusses of different orders. A formula for the relationship between the first frequency and the number of panels is derived from the analysis of the series of analytical solutions for trusses of different orders. A simplified version of the Dunkerley method is used for the solution, which gives a more accurate approximation in a simple form. The relationship between the truss deflection under distributed load and the number of panels was found. Spectral constants were found in the frequency spectrum.
Авторлар туралы
Mikhail Kirsanov
National Research University “MPEI”
Хат алмасуға жауапты Автор.
Email: c216@ya.ru
ORCID iD: 0000-0002-8588-3871
SPIN-код: 8679-6853
Doctor of Physical and Mathematical Sciences, Professor of the Department of Robotics, Mechatronics, Dynamics and Strength of Machines
14/1, Krasnokazarmennay St, Moscow, 111250, Russian FederationӘдебиет тізімі
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