电工电子产品环境试验。第2部分：试验方法。振动、冲击和类似动力学试验样品的安装。
Environmental testing for electric and electronic products. Part 2: test method. Mounting of specimens for vibration, impact and similar dynamic tests.
冲击试验时，接点不应产生振动和鸟啄现象。
During impact test, no vibration and bird pecking phenomenon at contact point.
利用冲击振动试验法可以准确得到桥墩的一阶振型和一阶频率，利用这两个参数可以构造出一阶振型比、特征参数、一阶曲率模态差三个指标。
The first-order mode and the first eigenfrequency of the pier can be obtained easily and precisely by the impact vibration test method, from which three indexes such as the chang.
PIND试验可以改变的试验条件有冲击加速度、振动加速度、振动时间和试验次数。
Shock acceleration, vibration acceleration vibration time and test time are the changed condition in PIND test.
对管接头进行了气密、爆破、低温、高温、温度冲击和振动试验。
The couplings have undergone extensive qualification tests, such as proof pressure and burst pressure at different temperature, thermal shock and vibration.
对管接头进行了气密、爆破、低温、高温、温度冲击和振动试验。
The couplings have undergone extensive qualification tests, such as proof pressure and burst pressure at different temperature, thermal shock and vibration.
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