基于多面函数的环渤海区域地壳水平运动速度场模拟  

Simulation of Velocity Field of Horizontal Crustal Movement around the Bohai Sea Based on Polyhedral Function

作　　者：Phoumilay 张俊[1] 王春霞 

机构地区：[1]贵州大学矿业学院,贵州 贵阳

出　　处：《应用数学进展》2021年第11期3727-3734,共8页Advances in Applied Mathematics

摘　　要：利用2009~2014年间中国大陆构造环境监测网在环渤海及其邻区的多期GPS对地观测速度场数据,分别采用多面函数法、刚体模型(RRM)、整体旋转与均匀应变模型(REHSM)及整体旋转与线性应变模型(RELSM)对速度场数据进行拟合和推估。对四种方法的计算结果进行对比分析,结果表明无论拟合精度还是推估精度,多面函数法都要优于其他三种模型。在此基础上,应用多面函数法按0.5˚ ×0.5˚的间隔进行速度场插值,根据插值结果绘制了环渤海区域地壳运动的水平速度场,并计算出环渤海区域相对于ITRF2008,其东向速度为30.2844 mm/yr,北向速度为−11.2871 mm/yr,整体上以32.3194 mm/yr的速度往东南20.4406˚方向运动。Using the Chinese mainland tectonic environment monitoring network in the Bohai Sea and its adjacent areas, the velocity field data of multi-phase GPS observation in the 2009~2014 years were fitted and estimated by the multifaceted function method, rigid body model (RRM), the whole rotation and homogeneous strain model (REHSM), and the overall rotation and linear strain model (RELSM). The results show that the polyhedral function method is better than the other three models in terms of fitting accuracy and estimation accuracy. On this basis, the velocity field is interpolated at intervals by using the polyhedral function method. According to the interpolation results, the horizontal velocity field of crustal movement in the Bohai Rim region is drawn. Compared with ITRF2008, the east velocity is 30.2844 mm/a and the north velocity is −11.2871 mm/a. On the whole, it moves to the southeast at the speed of 32.3194 mm/a.

关 键 词：多面函数 环渤海区域 地壳运动 整体选与均匀应变模型 整体旋转与线性应变模型 

分 类 号：G63[文化科学—教育学]