normal mode of vibration

normal mode of vibration

[′nȯrməl ¦mōd əv vī′brā·shən]
(mechanics)
Vibration of a coupled system in which the value of one of the normal coordinates oscillates and the values of all the other coordinates remain stationary.
References in periodicals archive ?
Note that the preceding discussion applies to the normal mode of vibration welding, in which the vibratory motion is parallel to the seam being welded, that is, at right angles to the thickness direction.
The data were obtained in the normal mode of vibration welding, in which the vibratory motion is normal to the specimen thickness [23].
Past work on welding has been concerned only with the normal mode of vibration welding [ILLUSTRATION FOR FIGURE 1A OMITTED], and has focused on characterizing the effects of weld parameters, such as the weld frequency, the weld amplitude, the weld pressure, and the weld time, on the welding process and on the strength of welds for several different thermoplastics.