damping period

Semi-rigid connection has the advantages of both the rigid connection and hinged joint, which can increase structural damping, lengthen period, and decrease vibrational amplitude, so that alleviate seismic hazard.

半刚性连接兼有刚性和铰支连接的长处，可增加结构的阻尼，延长周期，减小震幅，从而降低震害。

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Moreover, the ductility level, damping ratio and natural period of systems produce important effects on the energy spectra of bilinear SDOF systems, and the effect of yield stiffness ratio can be neglected.

体系延性系数、阻尼比、自振周期是影响双线性SDOF体系能量谱的重要因素。

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The new method can measure damping period of dial instrument rapidly and accurately.

该方法能够快速、确地测量指针式仪表阻尼时间。

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His paper introduces the practice on putting blast furnace fans in the big system of air providing and air using to raise the halting rate during the blast furnace damping down period of 2.5 ￣ 4h to save electricity.

介绍了将高炉风机置于供风、用风大系统中，提高其在2.5～4h高炉休风区间的停机率以达到节电的实践。

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The paper analyzes the disadvantage of general damping period measurement method of dial instrument, researches a automatic damping period measure method, which is based on image recognition.

分析了常用仪表阻尼时间测量方法的弊端，研究了一种基于图像识别的自动阻尼时间测量方法。

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Damping Period Measurement Method of Dial Instrument Based on Image Recognition

基于图像识别的指针式仪表阻尼时间测量方法

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According to the micro-fluctuation theory the windshear has no influence on the short-period motion and the damped rise-fall motion of the half-amplitude time while the frequency of the rise-fall motion and damping changes in accordance with the windshear.

小扰动理论指出风切变对短周期运动和阻尼起伏运动至半振幅的时间无影响，但起伏频率和阻尼率随风切变而相应地变化。

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