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About 983 years, the method of the invention by raising or lowering the water level to transport vessels, i.e. spaced from the construction of two dams, let the hull into the two pools formed by the dam. 1795 United States appear first canal with locks - Little Falls Canal, which uses wooden gate. Around 1830, there have been first metal gate. Hydraulic steel gate generally set at Hydro inlet and outlet positions, such as by closing or opening the gate to control the buildings over the water orifice to control the downstream water level, adjust the flow, resulting in flood control, power generation, irrigation, navigation and other benefits, and maintaining security of hydraulic structures. Radial gate with no gate slot, the smaller opening and closing force, good hydraulic conditions, are widely used as a working gate run on all types of waterways. Years of practice showed that the vast majority of good operating performance radial gate has withstood the test design conditions. However, due to the elongated arm radial gate pass water pressure is very sensitive to the hydrodynamic pressure, radial gate used in China for decades; there have been a lot of accidents. Jiguang Zhang and Liu Christine tolerance analysis of the 1960s and 1970s, the construction of more than 10 low-head curved steel gate crashed instance, the curved steel gate triggered the accident in accordance with the characteristics and causes of damage are divided into five categories: quasi-periodic impact damage; top of the door and At the same time destroy the door at the end of overflow; turning failure destruction; local open discharge and manufacture and installation of accident damage. Therefore, the significance of this study lies: in the initial design phase of construction projects get feature works according to the force structure of the optimal topology, saving time and effort; further complete the form according to the optimal topology, size optimization, the most close to the real force of the three-dimensional curved steel gate design, safe, easy to operate, save material, cost control and other purposes.

Research on the arc and the water gate valve continuum topology optimization design