桥梁环境振动试验具有简单方便和花费少等优点。
Bridge ambient vibration test has an advantage of being simple, fast and cheap.
文中最后对国外环境振动试验标准的发展趋势提出了一些看法。
Finally, it gives views on the trend of development in the foreign specifications of environmental vibration test.
进行现场环境振动试验，测量了该桥的竖向、扭转动力特性，以及吊索恒载下的索力。
In the ambient vibration test, the dynamic characteristics of the bridge and the tension force of the cables under constant load were measured.
因此，如何评价环境振动试验振动信号质量，成为工程结构系统识别十分活跃的研究课题。
Therefore, how to evaluate testing vibration signal quality, which is a active research topic of system identification.
环境振动试验是检测大型桥梁结构的主要方法，检测得到的模态参数是判定桥梁健康状况的重要依据。
Ambient vibration test is the main method of detecting a large bridge structure, Modal parameters is important to determine the health status of the bridge.
与强迫振动试验相比，环境振动试验比较简单、方便，所确定出的小振幅水平下的木塔结构动力特性具有足够的精度。
Compared with forced vibration tests, the ambient vibration test is more convenient and it has enough accuracy for the small amplitude response characteristics.
首先介绍空空导弹飞控舱环境应力筛选随机振动试验过程中出现振动过应力的情况，然后对出现振动过应力的原因进行了分析。
Firstly, the situation of excessive dynamic stress during vibration test of environmental stress screening for an air-air missile flight control cabin was introduced.
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.
在此基础上，采用环境随机振动法进行动载试验，并对理论分析计算值和动测试验值进行比较分析。
Through the ambient vibration testing, this paper make a comparative analysis of the theoretical conclusion and experimental data.
试验表明：电子产品在振动环境中的损伤不仅与振动类型及幅值有关，也与其自身结构有着密切的关系。
The experiment showed that the damage of electronic product in vibration environment has relation with type and amplitude of vibration and structure of the product.
为利用电动振动台进行模拟冲击环境试验，给出了一种时域冲击波形合成方法。
An effective shock response spectrum (SRS) time-history waveform synthesis method was presented for simulating shock environment with electro-dynamic shakers.
研究飞行振动环境载荷地面试验模拟的等效性问题。
Excitation equivalence in ground vibration test with respect to real flight vibration environment is studied.
试验的结果难于预测产品在振动-离心复合环境下潜在的故障。
But the potential reliability of the objects in the compound environment can not be forecast accurately by the asynchronous experimental results.
文章概述了对卫星及星上组件进行振动环境试验现有的故障诊断方法，并阐述了建立经济、有效的航天器故障诊断专家系统的重要性。
The existing fault diagnosis methods for spacecraft dynamic test and related modules are reviewed. The importance of building an economical and efficient expert system is stressed.
高低温试验台、振动试验台、盐雾试验台以及脉冲压力试验台等为检测汽车空调产品环境性能提供了可靠的保证。
High and low temperature test rig , vibration test rig , salt spray test rig and pulse pressure test rig are used for automotive A/C products tests .
高低温试验台、振动试验台、盐雾试验台以及脉冲压力试验台等为检测汽车空调产品环境性能提供了可靠的保证。
High and low temperature test rig , vibration test rig , salt spray test rig and pulse pressure test rig are used for automotive A/C products tests .
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