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研究单柔体动力学的原因是,一方面单柔体动力学是多柔体动力学的基础,把单柔体动力学的理论研究好,多柔体动力学的理论也就水到渠成;另一方面,单柔体动力学还有它独特的重要应用.在将质点刚体力学与变形体力学杂交的前提下,建立了非保守单柔体动力学的拟变分原理.以拦截器为例说明非保守单柔体动力学的拟变分原理的拟驻值条件的物理意义,以火箭发射为例说明单柔体动力学中的“一力二用”的特性,以伸展柔性梁与航天器姿态耦合问题为例说明由单柔体动力学向多柔体动力学的过渡.最后,讨论了几个相关的问题.
The reason for studying single soft body dynamics is that on the one hand, single flexible body dynamics is the basis of multi-flexible body dynamics, and the theory of single flexible body dynamics is well studied and the theory of flexible body dynamics is ripe. Another In addition, the single soft body dynamics has its unique and important application. Under the premise of hybridizing the rigid body mechanics and the deformed body mechanics, the quasi-variational principle of non-conservative single flexible body dynamics is established. The physical meaning of the quasi-stationary value condition for the quasi-variational principle of non-conservative single flexible body dynamics is described by taking the rocket launching as an example to illustrate the “one force and two functions” property of single flexible body dynamics to extend the flexible beam and Spacecraft attitude coupling problem as an example to illustrate the transition from single flexible body dynamics to multiple flexible body dynamics.Finally, several related problems are discussed.