惯性系

Newtonian mechanics is correct in low speed inertial system.

牛顿力学只适用于低速惯性系

This model is different from the structural dynamics model in a non-inertial reference frame with large overall motions known.

本文从力学基本原理出发，分析了刚柔耦合零次近似理论失效的原因，深入研究了有大范围运动的柔性体变形场的描述，建立了刚柔耦合一次近似的动力学模型；然后利用上述模型，从非惯性系下的结构动力学问题和大范围运动为自由的刚柔耦合动力学问题这两个层次上进行了刚柔耦合动力学建模理论与性态的研究，采用理论和实验相结合的手段来检验了一次近似刚柔耦合动力学模型的正确性。

In this dissertation, the flexible structure dynamics model in non-inertial frame with large overall motions is analyzed. This problem is the research base of dynamics of flexible multibody system.

本文从力学基本原理出发，分析了柔性结构在非惯性系下的动力学问题，此问题是柔性多体问题研究的基础。

In 1987, Kane et al.〓investigated the dynamics of a cantilever beam in a non-inertial reference frame.

建模时如果不考虑这种因素的影响，将会导致错误的结论。1987年，Kane〓对非惯性系下的旋转弹性梁的动力学特性进行研究，指出在转速较大的情况下，按零次近似建模理论进行仿真计算会得到梁的挠度趋于发散失稳这样一个错误的结论。

In chapter 4, dynamic behaviors of a cantilever beam in a non-inertial reference frame are investigated, and the differences of the dynamic property between the zero-order model and the proposed coupling model are revealed.

第四章研究了非惯性系下柔性梁的动力学性态。

The second part, we select the coordinate system for the sun to study the Earth's revolution, when the introduction of the Coriolis force on the impact of the spacecraft, and further selected for the reference system on Earth, the establishment of coordinate system, taking the Earth's non-inertial reference frame, the Coriolis profit impact of forces on the spacecraft.

第二部分，我们选取太阳为坐标系，研究地球公转时引入的科里奥利力对飞船的影响，并且进一步选取地球为参考系，建立坐标系，考虑地球为非惯性系时，科里奥利力对飞船的影响。

In this dissertation,the higher order rigid-flexible coupling dynamic model,which isdifferent from the structural dynamics model in the non-inertial reference frame withlarge overall motions known,which takes the coupling between large overall motionsand deformation motion into account with large overall motions being free,and ofcourse which is more accurate than the zero order model,is established for the first time,based on mechanical principles.

本文从力学基本原理出发，针对大范围运动为自由的刚-柔耦合系统，首次建立了较零次近似更精确的高次耦合动力学模型，与大范围运动为已知的非惯性系下的耦合动力学模型不同，进一步考虑了大范围运动和变形运动的相互耦合作用。

Based on the single-axis air-bearing test bed, three experiment schemes are creatively designed for investigating the behaviors of rigid-flexible coupling dynamics:(1) experiment scheme for structural dynamics problem under a non-inertial frame,(2) experiment scheme for rigid-flexible coupling dynamics with unknown large overall motions,(3) experiment scheme for modal analysis of a typical rigid-flexible coupling system.

为了能更深入地揭示刚柔耦合动力学特性与验证本文提出的一次近似模型的正确性，最后重点介绍了我们在单轴气浮台动力学仿真实验平台基础上，经过多次探索和总结，创造性地设计的三套刚柔耦合动力学实验方案：(1)非惯性系下结构动力学问题的实验研究方案，(2)大范围运动为自由的刚柔耦合动力学问题的实验研究方案，(3)刚柔耦合系统模态分析实验方案。这三套方案从实验的角度来讲是可行的，这为下一步的实验工作打下了基础。

The assertion that the forms of the laws of physics are the same in all inertial systems is known as the principle of relativity.

在一切惯性系中物理定律的形式都一样，这样的结论称为相对性原理。

In order to independence establish CFD software, this paper derives Navier-Stokes equations on non-inertial system and Favre-averaged equations, and Reynolds stress tensor on the basis of fluid mechanical fundamental.

为了独立编制CFD软件，本文从流体力学的基本原理出发，推导了非惯性系下Navier-Stokes方程组和Favre平均的方程组，同时对雷诺应力张量进行推导。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新