The design of octagonal ring dynamometers
The design of octagonal ring dynamometers
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DOI：
10.1006/jaer.1996.0002
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发表时间：
1996-01-01
期刊：
影响因子：
--
通讯作者：
ODogherty, MJ
中科院分区：
文献类型：
--
作者：
ODogherty, MJ
薄环的使用被认为是一种测量两个正交的力和力矩施加在环的平面，适当安装应变片桥的手段。给出了圆环、八角形环和扩展八角形环中弯矩和应变分布的基本公式。文中还给出了计算圆环挠度或刚度的表达式。本文根据环材料的最大应变准则和其他工作者使用过的六台正交环式测力仪的应变片电桥灵敏度的测量数据，导出了确定环厚度的设计方程，并给出了按几何参数设计扩展八边形环的方法。给出了确定合适的平均环半径（r）和计算环厚度（t）的设计曲线。给出了应变电桥对所施加的正交力（F和P）和力矩（M）的灵敏度的计算公式。讨论了测力计的刚度和固有频率。还考虑了环不能被认为具有薄截面（r/t < 3）的测力计。(C)1995年，Silsoe研究所。
The use of thin rings is considered as a means of measuring two orthogonal forces and a moment applied in the plane of the ring, with appropriately mounted strain gauge bridges. The fundamental formulae for the moment and strain distributions in circular, octagonal and extended octagonal rings are presented. Expressions are also given for calculating ring deflections or stiffnesses. A design equation for determining ring thickness is derived, based on maximum strain criteria for the ring material and on data from measurements of the strain gauge bridge sensitivities of six orthogonal ring dynamometers which have been used by other workers.A procedure is given for the design of extended octagonal rings in terms of geometrical parameters. Design curves are presented for the determination of an appropriate mean ring radius (r) and the calculation of ring thickness (t). Formulae are given for the calculation of the strain gauge bridge sensitivity to the applied orthogonal forces (F and P) and moment (M). The stiffness of the dynamometer and its natural frequencies are discussed. Dynamometers in which the ring cannot be considered to have a thin section (r/t < 3) are also considered. (C) 1995 Silsoe Research Institute.