論天然氣儲存對環(huán)境安全性效應評價(編輯修改稿)
2024-07-25 20:47 本頁面
【文章內(nèi)容簡介】 ressure value of 1000kgTNTR0/mΔP0/MPaR0/mΔP0/MPaR0/mΔP0/MPaR0/mΔP0/MPaR0/mΔP0/MPa51020457061225507571430559081635601099184065144The criterions of destruction demonstration mainly include the overpressure criterion, the impulse criterion and the overpressure impulse criterion and so on. But the overpressure criterion is more monly used, namely thought that so long as the overpressure of explosion wave achieves certain value, will have the destruction injury function to the goal. The relations between overpressure of explosion wave and Destructive effect of damage are showed in table 2.Table 2. Overpressure damage to the building and the humanOverpressure valueΔP/MPadamage effectOverpressure valueΔP/MPadamage effect～partial crushing of door and window pane＜safety of personnel can be guaranteed～partial crushing of door and window on pression face～slight injury～to window frame～acoustic organs injury or fracture ～cracks on wall～viscera serious injury or die～wide cracks on wall and roofing tile dropping＞Most of people die～pillar breaking off, room looseness——～the wall collapsed——～shockproof concrete damagedthe little room collapsed——～largescale steel framework damaged—— Explosion wave overpressure value estimationThe explosion wave overpressure value is not only related with the explosion energy, but also with concerns from the explosion center distance. The research[5,7] indicated that when the different quantity39。s TNT blast, if the goal and the explosion center are away from the ratio to be equal to the TNT charge ratio of the cube root, then the overpressure of explosion wave value is the same. The relations can be showed by formula (3). (3)(4)Where α is simulation proportion of explosion test, R is actual distance between goal and explosion center (m), R0 is proportionate distance between goal and explosion center (m), mTNT0 is test explosive of TNT (kg), mTNT is proportionate explosive of TNT (kg), it can be calculated by formula (4). E is explosion energy (kJ). ETNT is explosion energy for test explosive of TNT (The mean value is 4500 kJ/ kg), kJ. ΔP is explosion wave overpressure value of goal (MPa). ΔP0 is explosion wave overpressure value test goal (MPa). The author consider the test data incarnating relations between explosion wave overpressure value and distance as the database. Simulation proportion of explosion test can be calculated by formula (3) based on proportionate explosive of TNT. Overpressure value can be calculated based on R and R0. This method is called simulation ratio method[4,7].For easy calculation, the author draws conversion relations figure between R with R0 which occurred by different gas pressure of 5000m3 tank. The curves are shown in fig. 3. ；；；；Figure 3. Curve: Transformation between R and R0For this explosion wave overpressure value of different volume can be calculated based on equal principle between R0 ratio and inverse ratio of tank volumes’ cube root. 4 Explosion damage effect analysis Explosion damage effectBased on overpressure criterion, damage effect to ment tanks can be evaluated corresponding table 2. At present, domestic tank of 5000m3 has the best costeffective in all sorts of tanks[8]. Taking this s
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