文中阐述了框架结构有限单元各阶动约束模态函数的概念，并用它组成结构有限单元各阶动态形函数矩阵。
The concept of dynamic constraint mode functions for elements of a frame is introduced and it is used to form the dynamic shape function matrixes of each order for the finite elements of a frame.
既然这样，它们为什么会或引导或加剧或激励或约束着生活中的一举一动呢？
Why, then, should they direct and heighten and provoke and curb every action of life?
通过放松某个位移约束并施加相应的动内力来建立力法的基本体系。
The basic system is established through releasing one of the displacement constraints with the corresponding internal force exposed.
本文结合课题要求，主要讨论了在现有条件下在动坐标基准下如何处理GPS数据和弱约束条件下如何提高测姿精度的问题。
This paper combining the project request, mainly discuss under the condition of moving coordinate how to handle GPS data and under weak restrictions how to improve the attitude accuracy.
优化的约束条件包括应力、刚度、位移、频率、临界压力及动响应。
The optimization constraints can be stress, stiffness, displacement, frequency or buckling load and dynamic response.
通过耦合电路方程，并以动触头上的预压力为约束，经迭代运算，确定动触头的打开时间。
Coupled with circuit equations, the opening time of movable contact also can be calculated using iteration with the restriction of contact force.
首先在第二种约束方式下，利用有限元模态分析方法对几种不同板厚的机架进行了动、静态分析，得到了机架变形、应力及各阶振型与频率。
First, using second constrain, the static state and dynamic analysis applied to the frame of a few thickness plates with FEM modal analysis, distortion, stress, vibration and frequency were gained.
提出一种基于螺旋系线性相关性和约束反螺旋概念的空间并联机器人输入原动件选取合理性的判别方法。
Based on the concepts of reciprocal screws and their linear correlativity, a detecting method of input interference in a spatial parallel manipulator is presented.
本实用新型能够有效约束曲轴的挠动，使转子压缩机性能得到改善。
The utility model can efficiently restrict the deflection of the crankshaft, so as to improve the performance of the rotor compressor.
计算了典型的单机开式复合约束绳系的动点坐标、绳力、吊点反力。
It is established that the general iteration formulas of the moving point coordinates.
并对比两种情况下的动测曲线，发现桩顶受约束时桩的动测曲线不仅受桩周土体的影响，还受到上部结构的干扰，并且桩身反射的三维效应更明显。
The dynamic tests of top-restricted concrete pile are affected not only by the soil around pile, but also by the upper structure, and the signal of 3D effect reflected by the pile is stronger.
并对比两种情况下的动测曲线，发现桩顶受约束时桩的动测曲线不仅受桩周土体的影响，还受到上部结构的干扰，并且桩身反射的三维效应更明显。
The dynamic tests of top-restricted concrete pile are affected not only by the soil around pile, but also by the upper structure, and the signal of 3D effect reflected by the pile is stronger.
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