Paradoxes in rigid-body kinematics of structures

被引：0
|
作者：
Mentrasti, L [1 ]
机构：
[1] Univ Ancona, Fac Ingn, Ist Sci & Tecn Costruz, I-60131 Ancona, Italy
来源：
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME | 1998年 / 65卷 / 01期
关键词：
D O I：
10.1115/1.2789029
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The paper discusses two paradoxes appearing in the kinematic analysis of interconnected rigid bodies: there are structures that formally satisfy the classical First and Second Theorem on kinematic chains, but do not have any motion. This can arise when some centers of instantaneous rotation (CIR) relevant to two bodies coincide with each other (first find paradox) or when the CIRs relevant to three bodies lie on a straight line (second kind paradox). In these cases two sets of new theorems on the CIRs can be applied, pointing out sufficient conditions for the nonexistence of a rigid-body motion. The question is clarified by applying the presented theory to several examples.
引用
收藏
页码：218 / 222
页数：5
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