| 单词 | damping out |
| 释义 | > as lemmasdamping out b. The action of damping an oscillation or an oscillating body (also damping out: see damp v. 1c, 1d); the resistance to an oscillation; also, the amount of this, as measured by the rate at which the oscillation diminishes in amplitude. ΘΚΠ the world > movement > motion in specific manner > alternating or reciprocating motion > oscillation > [noun] > imposing or acting as resisting influence damping1870 the world > movement > absence of movement > [noun] > state of cessation of movement > arrest of motion > damping of oscillation damping1870 the world > matter > physics > mechanics > types of motion > [noun] > vibration or oscillation > damping of oscillation damping1870 critical damping1898 1870 London, Edinb. & Dublin Philos. Mag. 39 435 An oscillatory current..sustains itself twice as long against the damping action of resistance as a comparatively steady current of the same maximum value. 1874 London, Edinb. & Dublin Philos. Mag. 4th Ser. 47 296 The damping effect which the multiplier exerts on the swing of the needle. 1877 Ld. Rayleigh Theory of Sound I. iii. 57 The vibrations of a tuning fork properly constructed and mounted are subject to very little damping. 1879 Encycl. Brit. X. 51/1 By damping is meant the decrease of the extent of the oscillations of the galvanometer needle arising from the dissipation of energy through the resistance of the air, the action of currents induced in neighbouring metallic circuits, the viscosity of the suspension fibre, and so on. 1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) II. 344–5 A metallic surface, called a Damper, is sometimes placed near a magnet for the express purpose of damping or deadening its vibrations. We shall therefore speak of this kind of resistance as Damping. 1883 E. Atkinson tr. A. Ganot Elem. Treat. Physics (ed. 11) 832 The greater the masses of metal, and the more closely they surround the magnet, the stronger is the damping. 1907 J. Erskine-Murray Handbk. Wireless Telegr. i. 28 Damping or decrease of amplitude is due to two causes—firstly, to dissipation of energy, as heat, in the local circuits; secondly, to radiation. 1912 Q. Rev. July 242 The damping-out of oscillations cannot be expected to be as rapid. 1945 Electronic Engin. 17 455 Resulting in better damping of the receiver diaphragm and consequently suppression of the effects of resonance. 1958 Van Nostrand's Scientific Encycl. (ed. 3) 476/2 The metal specimen is vibrated and the rate of damping-out of the vibrations observed. 1967 E. U. Condon & H. Odishaw Handbk. Physics (ed. 2) ii. iii. 22/1 As the magnitude of the damping is increased, the rate of decay of the oscillations becomes greater..until..the motion becomes aperiodic and is said to be critically damped. < as lemmas |
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