水利学报2015，Vol.46Issue(12)：1434-1443,10.DOI:10.13243/j.cnki.slxb.20150050
基于非均匀缝隙的充水保压蜗壳三维仿真算法研究
Research on three-dimensional simulation algorithm of preloaded filling spiral case with non-uniform gap
摘要
Abstract
An improved simulation method base on non-uniform gap and contact is proposed for simulate the construction process of preloaded filling spiral case, called the simulation algorithm(SUA). The method?ology proposed is effectively to capture the initial gap. It overcomes the limitation of traditional simplifica?tion algorithm which is neglecting gap and contact relationship of spiral case and concrete. By means of the method, the gap value, contact status and stress field of surrounding concrete for Nuozhadu hydropower project is mainly analyzed. The results show that the initial gap is non-uniform and local closed because of the asymmetry of spiral case structure. So, the ideal situation of no gap, no energy transfer between spiral case and surrounding concrete is not existed. The top of stay ring, the roots of turbine pier and the en?trance of spiral case is the dangerous position of crack initiation and propagation. The results indicate that compared with the simplification algorithm(SPA), the law of stress distribution basically consistent, but the SPA method leans to be insecure,the relative error is big on top of spiral case and stay ring.关键词
水工结构/仿真算法/接触/非均匀保压缝隙/充水保压蜗壳Key words
hydraulic structure/simulation algorithm/contact/the non-uniform gap/preloading filling spi?ral case分类
建筑与水利引用本文复制引用
郭涛,张立翔,李世杰..基于非均匀缝隙的充水保压蜗壳三维仿真算法研究[J].水利学报,2015,46(12):1434-1443,10.基金项目
国家自然科学基金项目(51309128,51279071) （51309128,51279071）
昆明理工大学校人才启动项目(14118633) （14118633）
