| 李昊,张园,文恒.水力自动滚筒闸门振动特性的数值模拟及试验研究[J].水利学报,2015,46(11):1360-1370 |
| 水力自动滚筒闸门振动特性的数值模拟及试验研究 |
| Experimental research and numerical simulation on vibration characteristic of hydraulic automatic drum gate |
| 投稿时间：2015-02-04 |
| DOI：10.13243/j.cnki.slxb.20150162 |
| 中文关键词: 水力自动滚筒闸门 振动位移 流固耦合 模型试验 数值模拟 |
| 英文关键词: hydraulic automatic drum gate vibration displacement fluid-solid coupling model experiment numerical simulation |
| 基金项目:国家自然科学基金项目(50669001) |
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| 摘要点击次数: 1680 |
| 全文下载次数: 29 |
| 中文摘要: |
| 水力自动滚筒闸门在泥沙淤积的情况下开启自如,可有效利用洪水资源。为将这一构想应用于实践工程,本文在模型试验和理论分析的基础上,结合数值模拟,研究了水力自动滚筒闸门在动水压力作用下的振动特性分布规律。对试验中不同种类运行工况下圆筒闸体振动加速度、振动频率、振动位移等振动特性进行研究与分析。利用ANSYS力学分析软件对横置圆筒闸体进行三维建模。考虑振动等动力学特性,采用双向耦合分析以解决振动与大变形问题,采用有限单元法对瞬态控制方程进行离散。比较振动位移的模拟计算结果与试验所测定结果,其变化趋势基本吻合,均当圆筒顶部在水面线附近时简体的振动位移达到最大。筒体在动水压力作用下的最大位移主要发生在沿水流方向的筒顶位置,需要在运行中加以注意。上述结论对于研究、设计直至具体制造应用这一新型自控闸门提供了重要的理论与试验依据。 |
| 英文摘要: |
| Hydraulic automatic drum gate can be open and closed automatically when deposited by sediment, thus flood resources can be utilized effectively. In order to apply the assumption to the engineering practice, in this paper the distribution of vibration properties of drum gate under the hydrodynamic pressure is studied with methods of model experiments, numerical stimulation and theoretical analysis. Vibration acceleration, vibration frequency and vibration displacement of the drum gate under different conditions were studied and analyzed. A three-dimensional modeling established by ANSYS is used to simulate the drum gate transversely placed in the water flow. With the consideration of dynamic characteristics, such as vibration, bi-direction coupling analysis is applied to solve vibration and large deformation problems. Transient control equation is dispersed by using the Finite Element Method. When the results of hydraulic-model experiments are compared with that of numerical simulation, the variation trends are found basically the same. It is testified that vibration displacement of the drum reaches maximum when the top of tank is near the flow profile. And it is demonstrated that the max displacement of the drum is on its top along the flow direction under the effect of hydrodynamic pressure, which should be paid more attentions. The conclusions above provide a theoretical and experimental basis for studying, designing and manufacturing the new automatic drum gate. |
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