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(四)受迫振动1.概述振动中一个非常重要的问题,是系统对外部激励的响应。激励可以是前面所讲的初始位移或初始速度或二者兼而有之。在初始激励消除之后,系统就作自由振动,这在前面已讲述过了。但激励也可以是在相当长时间内作用在系统上的力或其他参数。在这
(IV) Forced Vibration 1. Overview A very important issue in vibration is the system’s response to external stimuli. Incentives can be the initial displacement or initial velocity mentioned above or both. After the initial stimulus has been eliminated, the system vibrates freely, as described above. But the stimulus can also be a force or other parameter that acts on the system for a long time. At this