查询词典 rigid

It provides not only fundamental principle and analysis of Modern Applied Mechanics and Dynamics but also applications in research areas such as stability, rigid body and rigid-body systems, movements of celestial body and spacecraft, vibration, nonlinear dynamics, et al.

它的研究一方面提供了现代应用力学以及动力学一般理论最基本的原理和方法，另一方面，它本身也给出了在稳定性、刚体与刚体系、天体与宇航器的运动、振动、非线性动力学等领域中一系列有实用价值的成果。

Based on the theories of multi-body systems, this paper presented the subsystem method for dynamics of a rigid-flexible coupling system and a method for a flexible cantilever beam attached to a moving central rigid-body undergoing an arbitrarily three-dimensional large overall motion .

本文根据多柔体系统动力学理论，创新地提出了子系统的刚柔耦合动力学建模方法和考虑动力刚化效应的中心刚体作任意三维运动梁作三维振动的动力学建模方法。

Based on the equations, the position and attitude of micro flying robot with flapping wings can be controlled.For the rigid structure wing, a double rocker mechanism typical of two DOFs is designed, which is actuated by two PZTs. The mechanism can actuate the rigid wing to realize two DOFs movements. This mechanism has many characteristics, simple instructure, light in weight, reliable in movement, large in range, easy in drive and convenience in control.

设计了一个采用压电双晶片驱动的两自由度的双摇杆拍翅机构，该机构可以驱动刚性翅实现两自由度的拍翅运动，具有：结构简单、重量轻、动作可靠、拍动幅度大、驱动容易和控制方便等特点，适用于微型拍翅式飞行机器人的拍翅系统。

The three-dimensional models are successfully imported to ADAMS software through the special interface MECH/PRO, and then the virtual prototype models are founded by toolbox of ADAMS to apply forces and constraints to the parts of the models. The dynamic simulation of the multi-rigid-body rifle model is carried out under the condition of the single shoot by the low firing frequency, high firing frequency and superhigh firing frequency when the rifle model is fixed on the ground, then the dynamic simulation of the multi-rigid-body man-weapon system is operated under the conditions of single and repeating shoots.

通过Pro／E和ADAMS的接口MECH／PRO将三维实体模型顺利导入ADAMS中，并对高频点射步枪和人枪系统施加约束和力，建立高频点射步枪和人枪系统的虚拟样机模型，并且对高频点射步枪及人枪系统进行了较为系统的多刚体系统动力学分析和研究，分别对高频点射步枪固定状态下次高频、高频和超高频点射过程进行了多刚体系统动力学的仿真，在此基础上对高频点射步枪人枪系统点射和连发进行了仿真。

Frege, Russell, Kripke, etc., analyzed and explained this problem, and their views are not the same: Frege did not make the distinction between proper names and descriptions, and thought that difference in other aspects between proper names and descriptions can be tolerated as long as their references are the same; yet Russell strictly distinguished proper names from descriptions; and Kripke regarded proper names as rigid designators, and descriptions as non-rigid designators.

弗雷格、罗素和克里普克等人都对名称问题进行了分析和说明，而且他们的观点都不尽相同：弗雷格不区分专名和摹状词，认为它们只要指称相同，其他方面的不同都是可以容忍的；罗素严格区分了专名和摹状词；而克里普克却认为专名是严格的指示词，摹状词是非严格的指示词。

The non-uniform flow behind a rigid cylinder row with a small pitch ratio T/D= 1.5 is characterized by narrow and wide near wakes and multiple frequencies, and the vortex shedding behind a rigid cylinder row with T/D= 2.0 is replicated properly by the simulation results.

此外，还研究了单列自由振动的弹性圆柱在间隙比为2.0时的流体诱导振动问题，结果表明：在大振幅条件下，流体诱导力在x方向和y方向有较强烈的耦合；随着振幅的减小，x方向振动对y方向振动的影响可以忽略，可采用单自由度的动力学模型假设进行计算。

The non-uniform flow behind a rigid cylinder row with a small pitch ratio T/D=1.5 is characterized by narrow and wide near wakes and multiple frequencies, and the vortex shedding behind a rigid cylinder row with T/D=2.0 is replicated properly by the simulation results.

计算模拟结果很好地重现了刚性单列圆柱在小间隙比(1.5)下以宽、窄尾涡交替和多频为特征的非均匀流态，以及间隙比为2.0时的涡脱落现象。

The dynamic constraints on the system are second-order nonholonomic constraints. It is assumed that the rigid bodies are hinged at the center of percussion. By the translational acceleration inputs at one of the rigid bodies, the system has two different kinds of rotation around the center of percussion.

该系统的动力学约束是二阶非完整的，通过给定其中一个刚体的加速度输入，并假设被动关节安装在刚体撞击中心处，系统可以产生两种不同形式的绕撞击中心的转动。

Combining the construction and monitoring practice of Tanyaogou Bridge, the article emphasizes the construction technology of beam O of cantilever continuous rigid-frame bridge, which provides the guidance for future construction of continuous rigid-frame bridge.

结合炭窑沟大桥的施工及监控实践，重点介绍了悬臂法浇筑的连续刚构桥中0号梁段施工的技术方法，为今后的连续刚构桥的施工起一些借鉴作用。

"Set his body erect" means sit with a nicely straight back which is not rigid and uncomfortable.

经文说：「端正身体」意思是说坐时背部挻直而不僵硬或不舒服。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。