Abstract:

Simulation analysis of dynamic response of thin-wall cylindrical tank to shock wave was made.The software LS-DYNA was used to calculate the contour of pressure and the relationship between overpressure and time resulting from explosion of a tank filled with 50 m³ liquefied petroleum gas.The result was loaded to the thin-wall cylindrical tank located 50 m away.The simulation results indicated that the material located at the bottom of the thin-wall cylindrical tank facing the shock wave yielded before the peak of shock wave overpressure arrived，and the material located at the top of the thin-wall cylindrical tank back from the shock wave reached the yield point at 0.112 ms after the explosion.The top of the thin-wall cylindrical tank facing the shock wave appeared inflection soon after the peak of overpressure arrived.The top of the thin-wall cylindrical tank facing the shock wave began to unload when the transverse displacement reached 10 mm，and the tank became unstable.So，when there is an explosion in the tank area，the thin-wall cylindrical tank is very likely to become structurally unstable and lose structural strength，and it can be disabled under the effect of shock wave，so the thin-wall cylindrical tank is not reliable.