首页> 外文会议>MV2 Convention on Active Control in Mechanical Engineering, Oct 22-23, 1997, Lyon, France >Experimental study of dynamic response of structures with gaps excited by random white noise: Flexible impact support
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Experimental study of dynamic response of structures with gaps excited by random white noise: Flexible impact support

机译:具有随机白噪声激励的带间隙结构的动力响应的实验研究:柔性冲击支撑

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摘要

In the dynamic design of the structures with gaps, the interaction between the oscillating structure and the impact support is usually evaluated under the condition that the impact force modelling is the derivative of the elastic energy of the system only. This approximate dynamic model is frequently used for practical analysis to predict the response of dynamic structures such as piping having a clearance with the supporting device, mechanical equipment subjected to impact disturbance with the basements, and so on. Moreover, with a random excitation, the simulated response and the stationary Fokker-planck equation solution are frequently obtained by using this modelling. Nevertheless, the computation results have never been confronted to the experimental ones. This observation has motivated our research. Therefore, we have installed a dynamic experimental model thanks to which we could achieve the above mentioned comparison. In the first part of this study, we describe the methodology numerical modelling. The second part deals with the description of the experiment equipment and the necessary adjustment tests. In the last part, the stochastic non-linear experimental results are given and compared with the modelled ones. This study is based on the determination of the probabilistic characteristics (mean, standard deviation, probability law and spectral density) of the dynamic motion of both systems (principal structure and stopper).
机译:在具有间隙的结构的动态设计中,通常在冲击力建模仅是系统弹性能量的导数的情况下评估振动结构与冲击支撑之间的相互作用。这种近似的动态模型经常用于实际分析,以预测动态结构的响应,例如与支撑设备有空隙的管道,受到地下室冲击干扰的机械设备等。此外,在随机激励的情况下,通过使用该模型经常获得模拟响应和平稳的Fokker-Planck方程解。然而,计算结果从未与实验结果相提并论。这种观察激发了我们的研究。因此,我们安装了一个动态实验模型,因此可以实现上述比较。在本研究的第一部分,我们描述了方法的数值建模。第二部分介绍实验设备和必要的调整测试。最后,给出了随机非线性实验结果,并与建模结果进行了比较。这项研究基于确定两个系统(主结构和塞子)动态运动的概率特征(均值,标准差,概率定律和频谱密度)。

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