Study on the Influence of Frangible Roof Performance of Tank Explosion Under Multi-field Coupling
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Study on the Influence of Frangible Roof Performance of Tank Explosion Under Multi-field Coupling Yuqi Ding
· Ye Lu · Zengtao Chen
Submitted: 27 January 2019 / Accepted: 16 September 2019 © ASM International 2019
Abstract Taking the 3000-m3 vertical vault storage tank as the research object, the finite element calculation method is used to calculate the pressure and temperature of the fluid during the explosion of the tank. By calculating the structural response of storage tank using multi-field coupling method, the distribution of stress and the deformation of tank are obtained. The tank frangible roof performance influenced by explosion load in different working conditions is analyzed. The results show that the failure pressures of the tank roof are the same in emptytank, half-tank and full-tank conditions, and the damage pressure of the tank shell and bottom gradually increases with the storage liquid level. Temperature also affects the failure pressure at different locations. At the same location, the higher the temperature, the lower the failure pressure. When the tank is empty, the failure times of the roof and the bottom are almost the same, the failure time of tank shell is obviously earlier than that of other locations. The intensity ratio k is less than 1.5, which means the tank does not have frangible roof performance. For the liquid level of half tank and full tank, no matter where the explosion point is, the failure pressure at the roof-to-shell location is smaller than other locations, and the failure time at the
Y. Ding (&) · Y. Lu College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, Heilongjiang, China e-mail: [email protected] Y. Lu e-mail: [email protected] Z. Chen Department of Mechanical Engineering, University of Alberta, 10-219 Donadeo ICE Building, Edmonton, AB T6G 1H9, Canada e-mail: [email protected]
roof-to-shell location is obviously earlier than other locations. The intensity ratio k is bigger than 2.5, which means the tank have frangible roof performance. Keywords Storage tank · Explosion load · Multi-field coupling · Structural response · Frangible roof
Introduction Vertical vault storage tank is an important oil storage container. When the oil is stored for a long time, it is very volatile to emit combustible gas. Once the combustible gas is burned and exploded due to accidental ignition, it is easy to cause casualty and property damage [1, 2]. If the tank exhibits a non-frangible roof structure during the explosion process, that is the failure location is not the roof-to-shell connection, it may cause leakage of the internal medium, causing the fire to spread, which may further cause a chain explosion in the surrounding storage tank with great harm [3]. Therefore, it is extremely important to carry out the research on the performance of frangible roof under the internal explosion load. The location of the tank failure under the internal explosion load is related to the explosion pres
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