环境试验.第2-80部分:试验.试验Fi:振动.混合模式

[中文适用范围]： 本部分提供的试验方法，适用于需要经受模拟复杂以及混合激励振动试验的样品。 本部分的目的是要验证在经受规定的混合模式激励后，样品在功能和／或结构上不会产生不可接受 的降低。当实际环境的振动测量数据具有混合模式时，用本方法剪裁振动环境特别适合。 本部分也适用于揭示随机与正弦和／或随机混合振动应力累积效应，以及由此导致的样品机械缺陷 和规定性能的降低，这些信息结合有关规范可评定样品的可接受性。在某些情况下，本试验方法也适用 于验证样品的机械强度。 本部分也适用于在运输或实际使用环境中可能经受随机和／或随机与确定特性组合的振动的样品， 如在航空器，航天器以及运输中将被装在运输容器内，并将运输容器作为样品本身的一部分。 本部分适用于电工电子产品，也适用于其他需要的领域。 [外文原描述]： IEC 60068-2-80:2005 Intended for general application for testing specimens when simulation is required of vibration excitation of a complex and mixed nature. The purpose of the test is to demonstrate the adequacy of the specimen to resist the specified mixed mode excitation without unacceptable degradation of its functional and/or structural performance. It is particularly useful for tailoring mixed mode environments where measured data are available for the real life environment. The test also helps reveal the accumulated effects of stress induced by random vibration, mixed with sine and/or random, and the resulting mechanical weakness and degradation in specified performances, and to use this information, in conjunction with the relevant specification, to assess the acceptability of specimens. In some cases, this standard may also be used to demonstrate the mechanical robustness of specimens. This standard is applicable to specimens which may be subjected to vibration of a random and/or a combination of random and deterministic nature resulting from transportation or real life environments, for example in aircraft, space vehicles and for items in their transportation container when the latter may be considered as part of the specimen itself. Although primarily intended for electrotechnical specimens, this standard is not restricted to such specimens and may be used in other fields where desired.