蔓卷ばねを伝わる波動に対する粘性の影響

概要

論文の詳細を見る
The effects of the viscosity of the wire of a coil spring, which is not negligible when the spring is made of a twined wire, on the velocities and the amplitudes of both the torsional and extensional waves propagated along the spring are studied analytically. The characteristic behavior of the spring in this case is that the correction for the velocities and the damping coefficients for the two waves have their maximum values near x=1.8 and vanish at x=1, where x=λ/2πr, λ denoting the wave length, r the radius of the coil. For x smaller than a certain value there exists no oscillatory motion. The damping is larger for the extensional wave than for the torsional wave because bending and torsion of the wire are coupled for the former. The velocity corrections and dampings increase with the ratio of the radius of the wire to that of the coil. (Received December 12, 1952)
宇宙航空研究開発機構の論文
1953-02-28