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刘世建.基于加权影响矩阵的提篮拱二次调索方法研究[J].河北工程大学自然版,2019,36(2):43-46,55
基于加权影响矩阵的提篮拱二次调索方法研究
Research of secondary cable adjusting method of basket handle arch based on weighted in?uence matrix
投稿时间:2018-12-13  
DOI:10.3969/j.issn.1673-9469.2019.02.010
中文关键词:  加权影响矩阵  提篮拱  二次调索  迭代运算
英文关键词:Weighted influence matrix  Basket handle arch  Secondary cable adjusting  Iterative computation
基金项目:广西重点研发计划资助项目(桂科2018AB66014)
作者单位
刘世建 广西交通科学研究院有限公司 广西 南宁 530007 
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中文摘要:
      为避免大跨提篮拱吊杆索力二次调索过程中,结构内力、位移出现顾此失彼的情况。以一450m特大跨钢箱提篮拱为工程背景,二次调索过程中对影响矩阵增加加权系数,通过MATLAB求解加权后方程的最小二乘解,经过少量的迭代运算,索力差值即趋于稳定。结果表明:实测索力与设计成桥索力的相对误差可控制在5%以内,完全满足规范限值的要求;在有限元计算过程中考虑几何非线性效应的方式,减小了几何非线性效应对结构的影响;作为一种加速收敛的方法,加权影响矩阵具有收敛速度较为均匀的特点。
英文摘要:
      In order to avoid the inconsiderateness of force and displacement of the structure in the process of secondary cable adjustment of the suspender force of long-span basket handle arch.Use a 450m long-span basket handle arch as engineering background, the process of the cable the influence matrix increase the weighting coefficient, using MATLAB to solve the weighted least-squares solution of equation, after a small amount of iterative computation, the cable force difference is stable.Research shows that:The relative error of the measured cable force with completion cable forces can be controlled within 5%, fully meet the specification limit requirements.The way of considering the geometric nonlinear effect during finite element calculation reduced the influence of the effect on structure.As a way of accelerate convergence, the weighted influence matrix has uniform convergence speed.
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