水电站充水保压蜗壳初始保压间隙的构造方法

发布时间：2018-06-25 23:03

本文选题：水工结构 + 保压蜗壳　；参考：《水电能源科学》2017年10期

【摘要】：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。
[Abstract]:The high efficiency simulation of the initial pressure holding gap of the volute filled with water and pressure is one of the difficulties of the simulation algorithm. In order to make up for the deficiency of the traditional simulation algorithm, the numerical simulation experiment is carried out on Abaqus platform. This paper puts forward a method of constructing initial pressure holding gap by setting hinge-contact element on the transmission surface of spiral case and peripheral concrete and combining with element birth and death technique, then taking the spiral case structure of a large hydropower station in China as an example, the structure of the volute case of a large hydropower station in China is taken as an example. The traditional simulation algorithm and the new algorithm are used to simulate the pressure keeping gap of typical section in the process of volute compression and decompression. The results show that the spatial distribution of the initial gap obtained by the new algorithm is completely consistent with that of the traditional algorithm, and the new algorithm can be completed in one time, and the principle is simple and easy to master, especially for the higher efficiency of 3D computation, so it can be popularized and applied.
【作者单位】：长江勘测规划设计研究有限责任公司;武汉大学水资源与水电工程科学国家重点实验室;
【基金】：国家自然科学基金项目(51179141)
【分类号】：TV31

【相似文献】