刚体

The chaotic planar motion of a magnetic rigidsatellite in a circular orbit near the equatorial plane of the earth isinvestigated in the present paper.

讨论地球磁场中非自旋磁性刚体卫星在近赤道平面圆轨道上平面天平动的混沌问题。

We study the dynamic characteristics of loader linkages by multi-rigid-body and flexible-body dynamics theory.A finite element model neutral file of linkage is first generated in ANSYS.

以装载机工作装置主要受力件之一的连杆作为研究对象，结合多刚体动力学和柔性体动力学理论，建立连杆的刚-柔耦合运动学、动力学数学模型。

Based on Kane's dynamics theory of multiple rigid body, the firing dynamic model was established for the coupling system of firer and rifle, and dynamic numerical simulation of the system was carried out. The launching motion parameters of equivalent bodies of firer and rifle were obtained.

基于凯恩多刚体动力学理论，建立了射手与步枪系统的发射动力学模型，进行了高频点射步枪人机耦合系统发射动力学的数值仿真，得到了射手及步枪等效体在发射过程中的运动参数。

This paper expounds the approach to simulation of the roller gear indexing cam based flexible cam axes,and studies the method of forcing between flexible cam axes and rigid graduator to set up the model for simulation of the roller gear indexing cam based rigid-flexible coupling .

阐述了在考虑凸轮轴柔性条件下实现弧面分度凸轮机构运动仿真的途径和步骤，结合有限元技术和虚拟样机技术，研究了如何在柔性体凸轮轴与刚体分度盘之间施加作用力的思想和具体实现方法，为该机构的刚柔耦合运动仿真提供了基础模型

Furthermore, the general stiffness matrix is formed and the finite element matrix equations about the general displacement of the rigid structure are derived.

而对刚体运动方程的进一步研究，得到了船与船厢的广义刚度阵并建立了关于船与厢广义位移的微分方程组。

A new method relying on the Stroh formulism and the theory of the surface impedance tensor was developed to investigate the dynamic instability of interfacial slip waves.The concept of the surface impedance tensor was extended to the case where the wave speed is of a complex value,and the boundary conditions at the frictionally contacting interface were expressed by the surface impedance tensor.Then the boundary value problem was transformed to searching for zeroes of a complex polynomial in the unit circle...

基于Stroh公式和表面阻抗张量理论，提出了研究界面滑移波动态失稳问题的一种新的方法·该方法将表面阻抗张量概念推广到复波速域，并将摩擦接触界面上的边界条件以表面阻抗张量表示·最终将边值问题化归为求解一个复多项式在单位圆内的根·以弹性半空间与刚体平面相对稳态摩擦滑移为例进行了详细的分析，导出了一个4次复特征方程并讨论了方程在单位圆内解的特性，给出了滑移界面波失稳条件的显式解析表达式

In the relative coordinate method, the array of the generalized coordinates of the system is formed by the relative coordinates of all rigid bodies. The principle of virtual power and Newton-Euler equations are applied to the system, and arrive at a set of second order differential equations of the generalized coordinates.

在相对坐标法中，系统的广义坐标列阵由系统中各刚体的相对坐标组成，对系统应用牛顿-欧拉方程和虚功率原理，得到系统广义坐标的二阶微分方程组。

Besides all six degrees of freedom of ship rigid body, other inportant generalized freedom such as aircushion pressure, freedom of seals and generalized coordinates of structural vibration are also included in the model in accordance with the nature of hybrid catamaran.

分析模型中除了船舶刚体运动的六个自由度外，还包括了其它重要的广义自由度-气垫压力、围裙运动的自由度以及结构各阶振形所对应的主坐标。

First, each shape is represented by the eigenvectors of an appropriately defined affinity matrix based on approximated geodesic distance, forming a spectral embedding which achieves normalization against rigid-body transformations, uniform scaling, and shape articulation (i.e., pose changing). This procedure is called the pose-oblivious transform.

首先，针对每一个形状都基于谱嵌入的方法求得其相应的谱嵌入表示，这里的谱嵌入是基于以近似测地距离为基础构造出的仿射矩阵的特征向量得到的，这一过程称为姿态无关变换，经过这一变换，模型的形状的描述符就具备了刚体变换不变、均匀缩放不变和姿态无关的特性。

The family of quaternions plays a role in quantum physics, geostatics, control theory and peg-top technology. It is important to know and research quaternions as the development of quaternions. Thus the real representation of quaternion matrices has been appeared.

近年来，四元数矩阵在刚体力学，量子力学，控制理论和陀螺技术中的应用日趋重要和广泛，随着上述四元数力学的不断发展，对四元数矩阵的进一步认识和研究就显得越来越重要。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。