【摘要】：針對設(shè)錨桿的溢流面板壩泄槽流激振動性能復(fù)雜的特征,基于ABAQUS軟件建立擬三維仿真模型,通過MATLAB自編程序?qū)崿F(xiàn)脈動壓強時域激勵荷載的構(gòu)造,采用時域分析法對不同泄流條件下設(shè)錨桿的系統(tǒng)模態(tài)和流激振動性能進行研究。結(jié)果表明:在水流流激振動作用下,錨桿對溢流面板壩泄槽動力穩(wěn)定性的影響主要體現(xiàn)于泄槽中不同的流速條件,當(dāng)泄槽最大流速大于40 m/s時,設(shè)錨桿使系統(tǒng)基頻降低速率明顯變緩,使泄槽底板接縫處發(fā)生較大變形和關(guān)鍵部位產(chǎn)生過大拉應(yīng)力的流速明顯增大,提高了其結(jié)構(gòu)在水流流激振動作用下的動力穩(wěn)定性。
[Abstract]:In view of the complex characteristics of flow induced vibration of overflow concrete face rockfill dam with anchors, a pseudo-3D simulation model is established based on ABAQUS software, and the time-domain excitation load of pulsating pressure is constructed by MATLAB program. Time domain analysis method is used to study the system modal and fluid-induced vibration performance of anchors under different discharge conditions. The results show that under the action of flow induced vibration, the effect of anchor rod on the dynamic stability of overflow slab dam is mainly reflected in the different flow velocity conditions, when the maximum flow velocity is more than 40 m / s. The reduction rate of the basic frequency of the system is obviously slowed down by the anchor rod, which causes the large deformation at the joint of the bottom plate of the drain slot and the increase of the velocity of the excessive tensile stress at the key position, which improves the dynamic stability of the structure under the action of the fluid-induced vibration of the water flow.
【作者單位】： 新疆農(nóng)業(yè)大學(xué)水利與土木工程學(xué)院;河海大學(xué)巖土工程研究所;
【分類號】：TV652.1

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