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采用三角形平面壳元对在高水压力下矩形底膜型扁充防水闸门的强度和稳定性进行了三维有限元分析，通过不同边界支承角度方案比较，寻求最佳边界支承角度。
The triangular planar shell element is used to analyze the strength and stability of the rectangular base membrane type floodgate with high water pressure. The optimal boundary support angle is obtained through comparison of different boundary support angle schemes.