[Design of mechanical structure dynamic characteristics and development of verification system].
OBJECTIVE
To present an effective method for structural dynamic characteristics design, required design and test means for space products' development.


METHODS
Computational modal analysis method was used to evaluate natural frequencies and modes of the products in the beginning of design, and test modal analysis method was used to identify the dynamic parameters of products in the test period.


RESULTS
The proposed computational modal analysis system is capable of making static and dynamic analysis, as well as natural frequencies and modes analysis of the structure, and this system could be applied in mechanical structure dynamic characteristics design. The proposed test modal analysis system could acquire real time force and acceleration signals, and obtain the basic modal parameters by processing the sampled data. This system could be used to modify mechanical products' dynamic characteristics and decrease vibration amplitude.


CONCLUSIONS
The computational and test results of two test models demonstrated that the developed computational and test modal system is effective. The method can be used for design of structural dynamic characteristics of space products.
Institute of Space Medico-Engineering, Beijing, China. 163507net@163.com
Ai-jun
AJ
Ma
Chen
C
Li
Hong-ying
HY
Liu
Xue-mei
XM
Feng
Xiao-hui
XH
Huang
Lai-jie
LJ
Lu
D000054:Acceleration; D003198:Computer Simulation; D004867:Equipment Design; D005069:Evaluation Studies as Topic; D020342:Finite Element Analysis; D008422:Materials Testing; D019563:Mechanics; D008962:Models, Theoretical; D015203:Reproducibility of Results; D013026:Space Flight / Q000295:instrumentation*; D013314:Stress, Mechanical; D014732:Vibration; D014893:Weightlessness