By the use of mathematic mechanized method and computer symbolic manipulating technique this paper carried out a symbolic solution on the synthetic problems of rigid body guided four bar linkages.
本文应用数学机械化方法和计算机符号处理技术，对平面四杆机构刚体导引综合问题进行了符号求解。
In this paer, by the use of the method of characteristic line of stress wave, a prediction analysis for the sacond impact of an elastic bar impacting on a rigid block is given.
本文采用应力波特征线方法详细分析了刚体撞块撞击固支的弹性长杆的撞击过程。
In the second chapter, aiming at solving the rigid problem of the jig needle bar, an accuracy control method based on FEA was put forward.
第二章，针对复杂宝石加工专用装备夹具针杆刚性较差的问题，提出了基于有限元分析的夹具针杆挠度控制技术。
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