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高烟囱支承施工平台辐射梁的支承点随烟囱高度增长不断往中心移动,滑模和施工平台在工作过程中处于运动状态,特别是当平台受力不均时会产生不均匀的变形和位移。因此,运动中的施工平台空间力学模型的建立和计算较为繁琐,大多数施工平台结构的设计计算常简化为平面结构进行分析,其结果难以反映施工平台的真实受力状况。以某电厂高烟囱液压同步提升施工平台为背景,考虑最不利工况,建立该施工平台的三维有限元模型,利用ANSYS有限元分析软件,对施工平台结构的受力及位移进行计算。结果表明,施工平台的位移以筒壁为支点呈现内沉外翘的趋势;内力除去掉支座位置有突变外,其余杆件受力均匀,呈现对称受力的特点,平台的结构形式对受力的影响较大。
The support points of the radiating beams on the high chimney supporting construction platform constantly move towards the center with the height of the chimney. The sliding mold and the construction platform are in motion during the working process, especially when the platform is under uneven force and generate uneven deformation and displacement. Therefore, the establishment and calculation of the space mechanical model of the construction platform in motion are complicated, and most of the design calculation of the construction platform structure is often simplified to the planar structure for analysis. The result is difficult to reflect the true force condition of the construction platform. Based on the hydraulic synchronous hoisting construction platform of a chimney in a power plant, the three-dimensional finite element model of the construction platform was established considering the most unfavorable working conditions. The force and displacement of the construction platform structure were calculated by ANSYS finite element analysis software. The results show that the displacements of the construction platform are inwardly and outwardly curved with the cylinder wall as the fulcrum; the internal force removes the sudden change of the bearing position, and the rest of the members are stressed uniformly and show the symmetrical force characteristics. The structural form of the platform The impact of force greater.