The big angle stability in rolling of ship in following seas is introduced and analyzed,and the study methods of the area of the transverse section is discussed when ship rolls in still water with big angle.

Summarize the outer condition resulting in broaching through reviewing the researches of broaching phenomenon, and then give some suggestions of manoeuvre in following seas.

A study of surf-riding phenomenon of ship in following seas is conducted.

The course-keeping ability of a naval patrol ship in following waves is analyzed by means of a practical approach consisting of semi-captive model test, semi-empiric numeric modeling, and numerical simulation.

By employing computational fluid dynamics software CFX to numerically simulate the process of a car trailing a container truck, a relative aerodynamic drag coefficient curve of the car in the process of trailing is obtained, and a study on the external flow field of the car is carried out.

When the leading bubble was steady,the relationship between instantaneous velocity,shape,acceleration of the trailing bubble and viscosity、 bubbles distance、bubble length was obtained.

By employing the Computer Fluid Dynamics(CFD) software to simulate the process of a car trailing a large truck,the aerodynamic drag coefficient and the aerodynamic lift coefficient of the car in the process of trailing were obtained.