Quasi-variational principles of single flexible body dynamics and their applications |
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Authors: | LIANG LiFu LIU ShiQuan &ZHOU JianSheng School of Civil Engineering Harbin Engineering University Harbin China China Sanjiang Space Industry Group Corp Wuhan |
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Institution: | (1) School of Civil Engineering, Harbin Engineering University, Harbin, 150001, China;(2) China Sanjiang Space Industry Group Corp, Wuhan, 430015, China |
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Abstract: | The reasons for studying single flexible body dynamics are that on one hand, it is the basis of flexible multi-body dynamics.
If the theory of the single flexible body dynamics has been deeply studied, the theory of flexible multi-body dynamics will
be researched easily. On the other hand, it has its unique and important applications. Quasi-variational principle of non-conservative
single flexible body dynamics is established under the cross-link of particle rigid body mechanics and deformable body mechanics.
Taking the interceptor as an example, this paper has explained the physical meaning of the quasi-stationary value condition
of the quasi-variational principle in non-conservative single flexible body dynamics. Taking the launch of rocket as an example,
it has illustrated the features of “one force for two effects” in a single flexible body dynamics. With an example of the
extending flexible beam coupled with the spacecraft attitude, it has shown the transition from the single flexible body dynamics
to the flexible multi-body dynamics. Finally, a number of related problems are discussed.
Supported by the National Natural Science Foundation of China (Grant No. 10272034), the Doctoral Education Foundation (Grant
No. 20060217020), and the Natural Science Foundation of Harbin Engineering University (Grant No. HEUF04003) |
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Keywords: | variational principle non-conservative system aerospace dynamics flexible multi-body dynamics single flexible body dynamics |
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