Numerical analysis is critically important to understanding the complex deformation mechanics that occur during sheet forming processes.It has been widely used
With the liquid propellant making up 60%—70% of the takeoff weight of the hypersonic vehicle,the dynamic load caused by great propellant sloshing interacts wit
The mathematical model of ultrasonic motor(USM)is the foundation of the motor high performance control.Considering the motor speed control requirements,the USM