... natural climate test 天然气候试验 natural frequency of vibration 自振频率 natural impedance 特性阻抗 ...
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And, the relationship between their natural frequency of vibration and their degree of compaction is measured through the test of transient hammering. Furthermore, the attenuation rule of vibration wave in sand sample and clay soil is gained.
利用瞬态锤击测试，测出新疆风积沙的自振频率及其与压实度的关系，并用此方法测定了振动波在沙样和粘性土中随距离的衰减规律。
参考来源 - 新疆风积沙力学性质与动力性能研究The numerical analysis and design were performed to obtain the structural natural frequency of vibration,member stress ratio,displacement,plastic hinge distribution,and damage level based on different three models,which are only reinforced concrete stand,only steel roof and combined stand and roof.
针对单独钢筋混凝土看台模型、钢结构模型以及结构整体模型三种计算模型,对结构自振特性、构件应力比、结构位移、塑性铰分布与损坏程度等性能进行深入量化分析与设计。
参考来源 - 贵阳奥体中心主体育场罩篷钢结构抗震性能化设计研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Then the author analyses the effect of the frame vibration and tries to make the natural frequency of vibration beyond the range of engine revolution rate.
分析了发动机振源对车架振动的影响，使车架主要模态的自振频率避开了发动机转速范围；
SA (spectral acceleration) is approximately what is experienced by a building, as modeled by a particle on a massless vertical rod having the same natural frequency of vibration as the building.
而光谱加速度大致上是一座建筑物承受的加速度，科学家把一颗与目标建筑物具有相同自然频率的粒子放在一个近似无质量的垂直控制棒上进行模拟得出此数据。
In this paper, the natural characteristics of TSS will be analyzed firstly, and then the peculiarity of its frequency and vibration will be summarized.
本文第四章首先对张弦桁架结构的自振特性进行了分析，对其自振频率和振型的特点进行了总结。
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