The influence of pressure changes on the integrity of tanks for storage of petroleum products and toxic substances
| Jazyk: | ukrajinština |
|---|---|
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Military Technical Collection; No. 24 (2021); 31-36 Военно-технический сборник; № 24 (2021); 31-36 Військово-технічний збірник; № 24 (2021); 31-36 |
| ISSN: | 2312-4458 2708-5228 |
| DOI: | 10.33577/2312-4458.24.2021 |
| Popis: | Tanks for the storage of oil products and toxic substances in warehouses are the main ones. They can be in the form of separate tanks or a group of tanks. The most widespread are vertical steel tanks with a stationary roof that a placed in open areas. The tanks heat up, and the intensity of evaporation of the oil product increases in case of fire. If there is a permanent roof, the pressure in the tank will increase. If the capacity of the breathing valves is less than the intensity of evaporation then there is a risk of explosion. Explosions in the tank often lead to the separation of the bottom, and the side cylindrical surface and the roof fly away instantly, spilling oil on neighboring tanks and the territory of the tank’s park. Then the combustion area increases intensively. The destruction of the integrity of the tank, due to the separation of the bottom, contributes to temperature and power stresses, the value of which increases with increasing temperature of their heating and increasing pressure, respectively. The values of temperature stresses are added to the power stresses caused by pressure, and when the critical value is reached, destruction occurs. We investigated the stress-strain state of a steel vertical tank for the storage of oil products and toxic substances. The analysis of the reasons for the occurrence of admissible pressure in the tank, which is the reason for the loss of its integrity, is carried out. Using the differential equation of a closed cylindrical shell, which is under the action of internal pressure, analytical expressions are obtained to find deformations and stresses in the side cylindrical surface and bottom. Were calculated axial and annular stresses for the tank of RVS-900. Based on the basic relations of the theory of elasticity of thin plates and shells analytical expressions of the stress-strain state of the cylindrical tanks are obtained for conditions for changing of pressure on their structural elements. It is shown that the greatest values of axial stresses are obtained on the surface of the connection of the cylindrical surface with the bottom. The researches results are presented graphically. Розглянуто напружено-деформований стан сталевого вертикального резервуару (РВС) для зберігання нафтопродуктів і токсичних речовин. Проведений аналіз причин виникнення понад допустимого тиску в середині резервуару, який є причиною втрати його цілісності. Використовуючи диференціальне рівняння замкнутої циліндричної оболонки, яка знаходиться під дією внутрішнього тиску, одержані аналітичні вирази для знаходження деформацій і напружень в боковій циліндричній поверхні і днищі. Для резервуара РВС-900 проведені розрахунки осьових і кільцевих напружень. Результати досліджень представлені графічно. |
| Databáze: | OpenAIRE |
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