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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Kinematic analysis, spectrum of natural frequencies and formula for the first frequency of a planar trussстатья
- Авторы: Kirsanov M.N., Sun, Jia Xuan
- Журнал: AlfaBuild
- Том: 27
- Год издания: 2023
- Издательство: Федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский политехнический университет Петра Великого"
- Местоположение издательства: Санкт-Петербург
- Номер статьи: 2703
- DOI: 10.57728/ALF.27.3
- Аннотация: The object of research is the statically determinate regular symmetrical rectangular beam truss with a double lattice is fixed on two supports. The lower chord of the structure is curvilinear with a rise in the middle of the span. The mass of the lattice is distributed over its nodes. Method. A kinematic analysis is presented that reveals the variability of the lattice for a certain number of panels. An algorithm for searching for the distribution of virtual velocities of lattice nodes in this case is described. Using the Maple computer mathematics system, a formula is derived for the dependence of the lower estimate of the first frequency of natural oscillations of the structure on the number of panels from the range of acceptable values. The result gives a good agreement with the numerical calculation carried out taking into account all degrees of freedom of the structure. It is shown that with an increase in the number of panels, the accuracy of the analytical solution increases. Spectral constants are found in the frequency spectrum of a family of regular trusses.
- Добавил в систему: Кирсанов Михаил Николаевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | 566cun.pdf | 1,0 МБ | 10 августа 2023 [KirsanovMN] |