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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 2. Отображено 2.
28-07-2023 дата публикации

Construction method and solving method of multi-field coupling model of concrete

Номер: CN116502492A
Автор: WANG QIAO, YU SIZHEN, QI TIANQI, ZHOU WEI, CHANG XIAOLIN, TAN JIANJUN, TIAN WENXIANG, MA GANG
Принадлежит:

The invention provides a concrete multi-field coupling model construction method and a concrete multi-field coupling model solving method, which respectively construct a hydration reaction equation, a temperature field control equation, a humidity field control equation, an adsorption/desorption isotherm equation and a mechanical field equation, and express and calculate a heat-humidity-force-chemical coupling process in a finite element. A Gaussian orthogonal space integration method and a backward Euler time integration implicit algorithm are adopted to solve the problem. The temperature and humidity in the concrete in a complex service environment can be accurately predicted, deformation and stress characteristics of the hydraulic concrete caused by temperature and humidity factors can be simulated, and support is provided for durability judgment, safety evaluation, service life prediction and the like of a hydraulic concrete structure.

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Номер записи: 1
20-06-2023 дата публикации

Carrier tape convenient to position

Номер: CN116265347A
Автор: YU SIZHEN
Принадлежит:

The invention relates to the technical field of carrier tapes, in particular to a carrier tape convenient to position, which comprises a unit carrier tape main body and positioning assemblies, the positioning assemblies are arranged at the two ends of the unit carrier tape main body, the positioning assemblies are fixedly connected with the unit carrier tape main body, and uniformly distributed positioning holes are formed above the positioning assemblies. A containing groove is formed in the upper portion of the unit carrier tape body, association grooves are formed in the two ends of the containing groove, limiting pieces are evenly distributed outside the association grooves, and the limiting pieces are fixedly connected with the unit carrier tape body. Finally, the carrier tape can be quickly and conveniently positioned, deviation is avoided, and the working efficiency is improved. And finally, the object can be simply and quickly mounted and dismounted, so that the carrier tape can ...

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Номер записи: 2