Study on Minimum Safety Protection Distance of High-Pressure Natural Gas
Pipeline Based on Physical Explosion Injury Consequences
Abstract
High-pressure natural gas pipeline transportation has the advantages of
large gas transmission capacity, low transportation cost, whereas
physical explosion of the pipeline may cause casualties and property
losses. Based on the theory of conversion of physical explosion energy
and TNT equivalent of high-pressure natural gas pipeline, this research
uses HyperMesh software to build a physical explosion model of
high-pressure natural gas pipeline. The crater generated by physical
explosion of pipeline was simulated and analyzed using LS-DYNA software.
It can be concluded that the crater building process was completed in
0.038 s, forming spindle shaped cavity crater (9.27 m×4.86 m×3.0 m). The
overpressure value of the shock wave at the center of the ground burst
is 6.64 MPa according to the simulation of the generation and
attenuation process of the physical explosion shock wave. Based on
Sadovsky’s research conclusion on shock wave attenuation, the minimum
distance required for shock wave attenuation on the ground to the safe
overpressure value (0.02 MPa) is 33 m. The research conclusion is of
great significance to the prediction of the consequences of physical
explosion damage of high-pressure natural gas pipeline and the
determination of the safe laying scheme.