为构建更接近真实的高分辨率三维海底地形,满足舰船安全高效航行及水下地形匹配导航需求,运用迭代函数系统(IFS,iterated function system)分形插值方法,对原始网格水深数据样本,根据其密度及震荡程度的差异,调节不同的垂直比例因子得...为构建更接近真实的高分辨率三维海底地形,满足舰船安全高效航行及水下地形匹配导航需求,运用迭代函数系统(IFS,iterated function system)分形插值方法,对原始网格水深数据样本,根据其密度及震荡程度的差异,调节不同的垂直比例因子得到细化的分形插值结果,以描述海底地形的起伏变化。仿真结果表明,对于平坦或缓坡海底地形,垂直比例因子在[0.05,0.2]区间构建结果能兼顾海底地貌的自相似与光滑要求;对于高频震荡海底地形,垂直比例因子在[0.3,0.5]区间构建结果牺牲一定光滑度条件下更能正确处理海底地形全貌与局部之间的关系,高度逼近海底地形自然地貌。样本数据均匀抽稀后,调节垂直比例因子,构建结果整体上可以与原始样本高度逼近,尤其在震荡剧烈的海底地形构建中具有优越性。展开更多
In order to realize information construction on settlement of pile-group foundation of Sutong Bridge, the monitoring instruments of high-precision micro-pressure sensor and hydrostatic leveling and settlement profiler...In order to realize information construction on settlement of pile-group foundation of Sutong Bridge, the monitoring instruments of high-precision micro-pressure sensor and hydrostatic leveling and settlement profiler were integrated synthetically. A set of practical multi-scale monitoring system on settlement of super-large pile-group foundation in deep water was put forward. The reliable settlement results are obtained by means of multi-sensor data fusion. Finite element model of pile-group foundation is established. By analysis of finite element simulated calculation of pile-group foundation, rules of settlement and uneven settlement obtained by monitoring and calculation results are coincident and the absolute error of settlement between them is 4.7 mm. The research shows that it is reasonable and feasible to monitor settlement of pile-group foundation with the system, and it can provide a method for the same type pile-group foundation in deep water.展开更多
文摘为构建更接近真实的高分辨率三维海底地形,满足舰船安全高效航行及水下地形匹配导航需求,运用迭代函数系统(IFS,iterated function system)分形插值方法,对原始网格水深数据样本,根据其密度及震荡程度的差异,调节不同的垂直比例因子得到细化的分形插值结果,以描述海底地形的起伏变化。仿真结果表明,对于平坦或缓坡海底地形,垂直比例因子在[0.05,0.2]区间构建结果能兼顾海底地貌的自相似与光滑要求;对于高频震荡海底地形,垂直比例因子在[0.3,0.5]区间构建结果牺牲一定光滑度条件下更能正确处理海底地形全貌与局部之间的关系,高度逼近海底地形自然地貌。样本数据均匀抽稀后,调节垂直比例因子,构建结果整体上可以与原始样本高度逼近,尤其在震荡剧烈的海底地形构建中具有优越性。
基金Project(2002CB412707) supported by the National Basic Research Program of ChinaProject(2006BAG04B05) supported by the National Science and Technology Pillar Program during the 11th Five-Year Plan of ChinaProject(2010B14414) supported by the Scientific Research Program of Center University in China
文摘In order to realize information construction on settlement of pile-group foundation of Sutong Bridge, the monitoring instruments of high-precision micro-pressure sensor and hydrostatic leveling and settlement profiler were integrated synthetically. A set of practical multi-scale monitoring system on settlement of super-large pile-group foundation in deep water was put forward. The reliable settlement results are obtained by means of multi-sensor data fusion. Finite element model of pile-group foundation is established. By analysis of finite element simulated calculation of pile-group foundation, rules of settlement and uneven settlement obtained by monitoring and calculation results are coincident and the absolute error of settlement between them is 4.7 mm. The research shows that it is reasonable and feasible to monitor settlement of pile-group foundation with the system, and it can provide a method for the same type pile-group foundation in deep water.
