The Effect of Temperature on Vibrational Characteristics of a Shaft-Disk System
| Autor: | Fu-Ji Hong, 洪福基 |
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| Rok vydání: | 2004 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 92 A lot of rotors of rotary machine running under the high-temperature environment, even temperature of rotors does increase progressively or decrease progressively. Because of the change of the temperature and load, the dynamic characteristics of the shaft and disk is also influenced. This paper discusses the effect of dynamic characteristics of the rotor various temperature. For understand relationship of different temperature to vibration amplitude or phase by way of theory and experiment at the same time, It used energy method derive motion equation of rotor and disk that under different temperature, and heat the rotor under various temperature with the heating device, set up the proximitor and keyphaser to measure vibration amplitude and phase. We learns the following from the result. The vibrational amplitude hasn’t increase or decrease obviously due to temperature change, but phase has obvious changes. the system operates below the critical speed, the phase increases with the rising of temperature obviously, reduce with the drop of temperature obviously; Instead, the system operating over critical speed, the phase decreases with the rising of temperature obviously, increases with the drop of temperature obviously, with operate under the critical rotational speed just the oppositly; And it is near to the critical speed, the phase is the greater in change. Consequently, if we use the phase to do relevant application, it need to pay attention to the variation of the shaft temperature to avoid making the wrong judgement and cause unnecessary losses . |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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