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充水保压蜗壳初始保压间隙的高效模拟是仿真算法的难点之一,为弥补传统仿真算法的不足,以ABAQUS为平台,开展数值模拟试验,提出在蜗壳与外围混凝土传力面上设置铰接-接触单元,并结合单元生死技术的初始保压间隙构造方法;之后以国内某大型水电站蜗壳结构为例,分别采用传统仿真算法和新算法模拟了蜗壳打压、卸压过程中典型断面保压间隙的过程。结果表明,新算法所得初始间隙的空间分布规律与传统算法完全一致,且新算法可一次完成、原理简单、易于掌握,尤其对于三维计算效率更高,可进行推广应用。
In order to make up for the deficiency of the traditional simulation algorithm, an ABAQUS platform is used to carry out numerical simulation experiments. It is put forward that on the transmission surface of the volute and the surrounding concrete, In this paper, the structure of the initial pressure-keeping gap in the life-and-death technology of the unit is set up. Then, the spiral case structure of a large-scale hydropower station in China is taken as an example to simulate the compression and compression of the volute with the traditional simulation algorithm and the new algorithm respectively Section pressure gap process. The results show that the spatial distribution of the initial gap obtained by the new algorithm is completely consistent with the traditional algorithm, and the new algorithm can be completed in one time. The principle is simple and easy to grasp, especially for the three-dimensional calculation efficiency, which can be popularized and applied.