Key;
Laboratory;
of;
Aerodynamic;
Design;
and;
Research,;
Northwestern;
Polytechnical;
University,;
Xi'an;
710072,;
China;
Key;
Laboratory;
for;
Strength;
and;
Vibration;
of;
Mechanical;
Structures,;
Xi'an;
Jiaotong;
University,;
Xi'an;
710049,;
China;
Electro-Mechanical;
Engineering;
Institute,;
Shanghai;
201109,;
China;