惯性参照系中恒矩作用下耗散不对称性对非对称刚体阻力介质旋转稳定性的影响

Yuriy Kononov, Akram Cheib
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引用次数: 0

摘要

假设非对称刚体质心位于刚体惯性第三主轴上,估计了耗散不对称性对动态非对称刚体在有阻力介质中均匀旋转稳定性的影响。在惯性参照系中,刚体在重力、耗散力矩和恒定力矩的作用下,绕一个固定点旋转。稳定性条件由一个由三个不等式组成的方程组表示。第一个和第二个不等式是关于耗散不对称的一次不等式,第三个不等式是第三次不等式。第三个不等式最难研究。分析研究了大小耗散不对称、恢复、倾覆和恒矩对刚体转动稳定性的影响。得到了耗散不对称值足够小时的渐近稳定条件和耗散不对称值足够大时的不稳定条件。稳定性条件相对于恒定矩和相对于恢复或倾覆矩被写成二阶小和一阶小。研究了刚体绕质心旋转的稳定条件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of dissipative asymmetry on the of rotation stability in a resisting medium of a asymmetric rigid body under the action of a constant moment in inertial reference frame
Assuming that the center of mass of an asymmetric rigid body is located on the third main axis of inertia of a rigid body, the influence of dissipative asymmetry on the stability of uniform rotation in a medium with resistance of a dynamically asymmetric rigid body is estimated. A rigid body rotates around a fixed point, is under the action of gravity, dissipative moment and constant moment in an inertial frame of reference. The stability conditions are represented by a system of three inequalities. The first and second inequalities have the first degree with respect to the dissipative asymmetry, and the third inequality has the third degree. The third inequality is the most difficult to study. Analytical studies of the influence of small and large dissipative asymmetries, restoring, overturning and constant moments on the stability of rotation of a rigid body are carried out. Conditions for asymptotic stability are obtained for sufficiently small values of the dissipative asymmetry and conditions for instability for sufficiently large values of the asymmetry. The stability conditions are written down to the second order of smallness with respect to the constant moment and the first - with respect to the restoring or overturning moments. Stability conditions for the rotation of a rigid body around the center of mass are studied.
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