| 分段多项式拟合在动三轴试验数据处理中的应用 |
| |
| 引用本文： | 周松望,周杨锐,吴海京,戴少军,沈志明,董明明.分段多项式拟合在动三轴试验数据处理中的应用[J].海洋学报,2014,36(5):186-189. |
| |
| 作者姓名： | 周松望 周杨锐 吴海京 戴少军 沈志明 董明明 |
| |
| 作者单位： | 中海油田服务股份有限公司, 天津 300451 |
| |
| 基金项目： | 国家科技重大专项项目（2008ZX05056-002-01-01）。 |
| |
| 摘 要： | 动三轴采集的试验数据点(剪应变与动剪模量和阻尼比之间)具有离散性和有限性,为方便应用需要对数据点进行拟合,但现有经验公式不一定很好吻合试验数据。为得到不同剪应变与对应的动剪模量和阻尼比之间的关系,本文利用最小二乘原理,对渤海某海洋平台地基土进行动三轴试验获得的动剪模量、阻尼比与剪切应变的数据进行了分段多项式的拟合。数据处理过程是先对剪应变值进行了压缩处理,然后再分段低次多项式拟合,得到多项式拟合参数。通过此项改进解决了正规方程解中的病态问题,且拟合效果良好。
|
| 关 键 词： | 海洋平台 地基土 动三轴试验数据 分段多项式拟合 |
| 收稿时间： | 2013/12/27 0:00:00 |
| 修稿时间： | 2014/2/17 0:00:00 |
The application of piecewise polynomial fitting for processing cyclic triaxial testing data |
| |
| Zhou Songwang,Zhou Yangrui,Wu Haijing,Dai Shaojun,Shen Zhiming and Dong Mingming.The application of piecewise polynomial fitting for processing cyclic triaxial testing data[J].Acta Oceanologica Sinica (in Chinese),2014,36(5):186-189. |
| |
| Authors: | Zhou Songwang Zhou Yangrui Wu Haijing Dai Shaojun Shen Zhiming and Dong Mingming |
| |
| Institution: | China Oilfield Services Limited, Tianjin 300451, China |
| |
| Abstract: | The recorded data by cyclic triaxial testing are discrete and limited, the relationships of data need to be fitted for easy use, however the present expirical equation is not available for testing data. To obtain the value of shear modulus and damping ratio for different shear strain, the piecewise polynomial fitting method is applied to normalized shear modulus and damping ratio versus shear strain based on least-square principle. The value of shear strain is converted to avoid the equation set ill-conditioned due to the great difference in shear strain magnitude. The fitting results is satisfactory by using the piecewise lower polynomial order fitting. |
| |
| Keywords: | offshore platform foundation soil cyclic triaxial testing data piecewise polynomial fitting |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《海洋学报》浏览原始摘要信息 |
| 点击此处可从《海洋学报》下载免费的PDF全文 |
|
