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free damped vibration
相关语句
  自由阻尼振动
     STUDY ON FREE DAMPED VIBRATION OF L-SHAPED PLATE WITH REINFORCED RIBS
     用解析法研究L型加筋板的自由阻尼振动
短句来源
  相似匹配句对
     Analysis of the Free Vibration of Damped System
     阻尼系统自由振动的分析
短句来源
     Discussion on Amplitude of Damped Free Vibration
     对衰减振动振幅的讨论
短句来源
     DAMPED MOTION OF AN ELECTRON IN FREE-ELECTRON LASER
     自由电子激光器中的电子阻尼运动
短句来源
     On f-free Subsets
     关于f-free子集
短句来源
     Free from Bounds
     不想让任何形式束缚我的自由
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  free damped vibration
The damping ratio was measured based on the free damped vibration after the artificial excitation.
      
Figure 16 Histogram of the strength of concrete for the smokestack Figure 17 Time history of displacement at the top during the free damped vibration.
      
Figure 17 shows the time history of displacement at the top during the free damped vibration after the artificial excitation.
      


This paper s'mplifles the impact process of the liquid cushion hammer as a free-damped Vibration and gives the dynamic response to the impact process. The is consistent with the measured one The study Shows that we can response obtain the ideal impact pulse of the liquid cushion system, lower the stress level in the hammer rad, gain the smooth and long transition, and make a large amount of impact energy transmmitted to the stake or rock by adjusting the structure parameters of the liquid cushion....

This paper s'mplifles the impact process of the liquid cushion hammer as a free-damped Vibration and gives the dynamic response to the impact process. The is consistent with the measured one The study Shows that we can response obtain the ideal impact pulse of the liquid cushion system, lower the stress level in the hammer rad, gain the smooth and long transition, and make a large amount of impact energy transmmitted to the stake or rock by adjusting the structure parameters of the liquid cushion. The analysis method for studing and designing liquid cushion hammer is provided in the paper.

本文把液垫式冲击锤撞击过程化为有阻尼的自由振动,求得撞击过程的动力响应,并与实测值一致。研究还表明,通过调节液垫结构参数使液垫冲击系统有理想的冲击脉冲,使锤杆中的应力水平降低、跃迁平稳、持续时间延长,将多的冲击能量传给桩柱或岩石,为研究与设计液垫式冲击锤提供了分析方法。

Very few experimental researches on ice-induced vibration of flexible conical structures are performed up to now. So an experimental program using DUT-1 model ice, with the ice sheet′s velocity changed, was carried out to simulate ice-induced vibrations of a flexible conical structure in laboratory. Steel material for the structure was chosen and the model of multi-DOF was designed. An improved method for dynamic load identification in time domain was adopted to determine the ice force during the dynamic...

Very few experimental researches on ice-induced vibration of flexible conical structures are performed up to now. So an experimental program using DUT-1 model ice, with the ice sheet′s velocity changed, was carried out to simulate ice-induced vibrations of a flexible conical structure in laboratory. Steel material for the structure was chosen and the model of multi-DOF was designed. An improved method for dynamic load identification in time domain was adopted to determine the ice force during the dynamic ice-conical structure interaction, based on the mixed dynamic displacement, acceleration and strain responses of the structure. Results show that the ice-induced vibration of a flexible structure is a kind of intermittent free-damped vibration after a forced vibration, dominated by modes of low frequencies, and frequency components of the ice force are abundant.

针对冰激柔性锥体振动实验研究开展得很少的现状,利用DUT-1非冻结可破碎模型冰进行了冰速变化时冰激锥体振动的室内实验模拟.模型锥体材料采用普通钢材,设计了更为贴近实际的多自由度锥体结构模型,应用改进的动态载荷时域识别方法,依据结构的位移、加速度和应变等混合动态响应,识别了冰-锥体结构动力相互作用过程中的动冰力.实验结果表明,冰激柔性锥体振动是一种以低频振动为主、间歇性的随机受迫振动和自由阻尼振动,作用于锥体上的动冰力频率成分丰富.

 
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