Penetration control system for keyhole pulse plasma arc welding based on reflecting plasma-flame voltage;

Numerical simulation of arc reflection in plasma arc welding processing;

Detection of keyhole behavior in keyhole plasma arc welding using plasma cloud voltage;

To study the relationship between damage of oil storage tank and uplift of tank body in earthquake destruction, static inclined test of oil storage tank on different foundations are designed,mathematical models with nonlinear finite element method and beam theory for analyzing seismic uplift response of the tank are suggested,and numerical results of uplift response are calculated.