Поиск оптимальных соотношений стрелы подъема и пролета структурной купольной конструкции
| Jazyk: | ruština |
|---|---|
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Вестник МГСУ. |
| ISSN: | 2304-6600 1997-0935 |
| Popis: | Поставлена задача поиска оптимальных соотношений параметров конструкции, выбраны переменные и постоянные параметры. За критерий качества принят минимум массы материала. Проведена серия расчетов с вариацией переменных. Получены результаты по оптимальному соотношению пролета и стрелы подъема конструкции. In this paper, the author considers the issues of design of domed space lattice frames, circular in plan and having rectangular center nets. These structures have several variables influencing their mass. Span width and dome rise are their modifiable parameters. Their fixed parameters include topology, net-to-net distance, length of top net rods, type of the transverse cross-section of rods, and the construction material. Their constraints include the tensile strength of elements, the stability of compressed elements, restrictions applied to the rigidity of a structure, and restrictions applied to the span size. The task of finding the optimal rise-to-span ratio was solved by introducing successive changes into variables. The value of the span was changed at the increments of 10 meters, while the rise was changed at the increments equal to 5 meters.As a result of a series of calculations, values of variable parameters of a convex spatial lattice frame having tubular sections and different ratios were obtained. If the value of a span is within the 30 m≤l< 60 meters range (where l is the span of a structure), the optimal rise value rests within (1/5 to 1/8)l. The optimal rise is (1/4 to 1/5)l for spans above 60 meters. |
| Databáze: | OpenAIRE |
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