Summary
Frequency characteristics of a linear oscillator or a seismometer, whose equation of free oscillation is\(\ddot x + 2\varepsilon \dot x\)+n 2 x=0, are usually represented by takingh(=ε/n) as parameters. In this case, however, the independent variable is the frequency of impressed force or displacement from outside on the oscillator. But, we often encounter those cases, where the frequencies from outside are constant, and the frequency of the oscillator or pick-up is to be changed, or the several oscillators with various frequencies are to be used. Then, of course,h cannot be taken as parameters, as they vary with the oscillator's frequencyn. The author here calculated the amplitude- and phase-characteristics for the latter case, taking\(\bar h\) (=ε/n) as parameters and represented them in thick lines in the figures together with the ordinary ones in thin lines.
Résumé
On rencontre souvent des problèmes où divers oscillateurs dé périodes propres différentesT 0j et de même coefficient d'amortissement ε, sont attaqués par un phénomène sinusoïdal de périodeT. Les courbes classiques qui donnent l'amplitude et la phase du mouvement forcé en fonction du rapportT/T 0 pour différentes valeurs du paramètreh=εT 0/2π, ne peuvent alors être utilisées. Nous donnons ici les courbes correspondant à des valeurs différentes du paramètreh(=ε/n)=ε T/2π.
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Notoj
Sama rimarko de la aùtoro estas donita en japana lingvo en la revuo «Sindo» (Vibrado) Vol. I (1947) N. 3.
T. Akima: Bull. Earthqu. Res. Inst. Vol. 26 (1948), pp. 95–99, kaj Vol. 27 (1949), pp. 69–74.
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International language: Esperanto.
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Miyamura, S. Noto pri devigata movado de lineara oscilatoro. Geofisica Pura e Applicata 20, 24–26 (1951). https://doi.org/10.1007/BF01996888
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DOI: https://doi.org/10.1007/BF01996888