振动发生机选择指南第2部分:动态结构试验设备

[中文适用范围]： 本文件提供了选择振动发生器的指南，该振动发生器将用于评估测试结构的频率响应或研究振动如何沿结构增加/减少。 这些结构动力学测试可以在现场或实验室条件下进行（参见 ISO 7626 或本文件描述了单个振动发生器产生的力的选择程序。 同时，为了移动大坝或桥梁等大型结构，通常采用振动发生器的组装。 正确定相的发生器产生的总力与单个振动发生器计算的力相同（见 6.2.6）。 指南也可用于选择用于模态测试的设备，以确定自然振动。 结构中的频率、模态形状和阻尼；然而，对于这样的测试，通常需要考虑的因素超出本文件所涵盖的因素。 本文件仅涉及平动激励。 对于用于产生角振动的设备，请参见参考文献[8 ]。 [外文原描述]： This document provides guidance to select a vibration generator that will be used to evaluate frequency responses of a test structure or to study how vibration grows/decreases along the structure. These structural dynamics tests can be carried out under field or laboratory conditions (see the ISO 7626 or ISO 10846 [4][5][6][7] series). This document describes the selection procedure in terms of the force developed by a single vibration generator. Meanwhile, to move massive structures such as dams or bridges, an assembly of vibration generators is usually applied. Properly phased generators produce in total the same force as calculated for a single vibration generator (see 6.2.6). Guidance also can be applied for the selection of equipment to be used for modal testing to determine natural frequencies, modal shapes and damping in a structure; however, for such a test, more factors than covered by this document usually need to be considered. This document deals only with translational excitation. For equipment applied to generate angular vibration, see Reference [8].