The sum of work of effect and reaction has nothing to do with the choice of criterion. With this conclusion, it is very easy to work out the sum of particle and work of internal force.
利用作用力做功和反作用力做功的代数和与参照系的选择无关这样的结论，计算质点组的内力作功之和将非常简捷方便。
The work summarized in this paper aims at improving the accuracy of rotor blade dynamics analysis, and that of its internal force calculation in particular, by the finite element method.
提高用有限元法进行桨叶动力分析、特别是动内力计算的精度是本文工作的主要目的。
The main purpose of the work described in this paper is to improve the accuracy of rotor blade dynamics analysis, especially, that of internal force calculation by the finite element method.
提高用有限无法进行桨叶动力分析、特别是内力计算的精度是本文工作的主要目的。
In this paper, IFSA programme is employed to study the internal force and displacement when the roofing grid and frame column under the effect of bridge crane and other loads work together.
利用研制的程序(IFSA)就桥式吊车及其它荷载作用下的屋盖网架与框架柱共同工作时的内力、位移等问题进行了研究和探讨，得出了桥式吊车荷载对整个厂房结构的影响范围及大小。
This article describes three types of rib beam calculation of internal force, and compare the three calculation methods to guide the practical work.
本文介绍了三种肋梁内力计算的方法，对三种计算方法作了比较，以供实际工程中选用。
This article describes three types of rib beam calculation of internal force, and compare the three calculation methods to guide the practical work.
本文介绍了三种肋梁内力计算的方法，对三种计算方法作了比较，以供实际工程中选用。
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