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中文摘要：
为研究引水工程对增强瓜渚湖水体流动的影响，以引水工程和瓜渚湖及其周围河网为研究范围，采用数值模拟方法，计算了现状条件下湖泊及其周围河网的流速和水位等水力要素，研究了瓜渚湖水域的水动力特征，发现瓜渚湖水域存在3个低流速区域。利用工程导流、分离流和旋涡控制理论，根据低流速区域的流动特性，设计了3种流线型水流控导工程，计算了在布设3个控导工程条件下瓜渚湖水域的水动力，结果表明：在控导工程的导流作用下水流被引导向了低流速区域，低流速区域流速增大，范围减小，同时，由于控导工程呈流线型，因此绕流后尾部没有明显涡流，减少了水流阻力和能量损失。
英文摘要：
In order to study the project measures for enhancing the hydrodynamic of Guazhu Lake, the selected range included diversion works and lake surroundings. A two-dimensional mathematical model numerical simulation method was used to calculate the hydrodynamic factors, such as flow velocity and water level, the hydrodynamic characteristics of the lake waters was analyzed and three low velocity zones existing in the lake was disclosed. On the basis of above analysis of the existing low velocity properties, three water streamlining control and diversion works were designed by the theory of flow separation and vortex and flow control. The results of hydrodynamic calculation indicate that the water flow into these low velocity zones and velocity increases by the action of laid streamline guiding and control buildings, and there is no obvious vortex at the tail of flow around works, the flow resistance and head loss are also decreased.
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Finite element analysis of stress intensity facors for surface temperature cracks in a concrete slab
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