| 摘要: |
| 本文采用试验与数值计算相结合的方法研究了掺气水流作用下板的振动问题。在研究中，首先对掺气水流作用下的板进行了线模态识别，确定了流弹系统的模态参数。并根据实测的脉动压力，利用相干尺度的概念在节点上聚合连续随机荷重，然后对板进行了有限元分析，并与实测结果相对比。研究的结果表明：利用相干尺度来分析连续随机荷重的耦合是可行的，同时，掺气水流对于弹性系统的附加质量很小，小于原连续水流附加质量的10％。 |
| 关键词: 脉动压力,随机振动,相干尺度 |
| DOI： |
| 分类号:TV312 |
| 基金项目: |
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| The random response of a plate subjected to the fluctuation pressure of aerated flow |
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Wang Yumiao
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Wang Yumiao (Shandong Hydraulic Engineering Institute)Lu Guanping(Anhui Water Resources Research Institute)
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| Abstract: |
| In this paper,the vibration of a plate subjected by fluctuation pressure from aerated flow were studied by combination of test and numerical calculation. The modal identification on line on the plate subjected by aerated flow were carried out as well as the numerical calculation. The modal parameters of the flow-elastic system may be obtained. According to the measured fluctuation pressure and lumping the continuous random pressure on the node with the coherence scale,the finite element analysis for the response was made. Also the response was measured and compared with the result of numerical calculation. It can be seen that the coherence scale may be used to analyze the couple of the continuous random pressure. Also it is shown in the identificaion on line that the attached mass on the plate from aerated flow is quite small and it is less then 10% for continuous flow. |
| Key words: Fluctuation pressure,random vibration,coherence scale |
