Testing Study On Dynamic Response Of Vertical Steel Storage Tank

Vertical steel storage tank is one of the main storage devices in petrochemical industry,because it is flammable and explosive stored and highly hazardous liquids, so if an earthquakeor accidents, the consequences will be very serious, even can cause huge economic loss andenvironmental damage. Establish a fiber Bragg grating sensing technology detection system,not only detection of tank running state real-time Under normal use, but also warning signalearly when in danger. To avoid more loss.This article is mainly divided into two aspects were studied:On the one hand, establish a tank model by finite element analysis software scaledADINA. Concluded that the dynamic response and seismic response results and analysis them.The dynamic response analysis includes two parts, one part is analysis dynamic response ofthe tank wall, the other part is analysis reservoir dynamic response of the tank. It is concludedthat the previous six order natural frequency of vibration and comparing with the specificationto verify the accuracy of the models. Then set up three kinds of tanks which volume of1000m3,5000m3and10000m3, simulate its seismic response under artificial seismic waveexcitation which liquid storage quantity, respectively whole tank two-thirds of the pot and athird. At the same time take the equinoctial such as ten of the tank from up to down in thetank wall, and testing. Comparative analysis of that each testing point displacement timehistory curve which was concluded and stress strain diagram of the tank.On the other hand, according to the simulation results to study the optical fiber sensorplacement method of the storage tank. Respectively set up single pot detection scheme andgroup detection scheme. While a single tank, considering therandomness of the spread ofseismic wave in the process, each tank put two columns of optical fiber grating sensor, andeach column arrangement10fiber Bragg grating sensor, take the equinoctial such as ten ofthe tank from up to down in the tank wall. When testing tank group, the monitoring centerdata processing use a4channel optical fiber grating network analyzer which model isBG_FBG₈125. According to the number of tank group, at most five single pot as a systemfor the setting of network analyzer.