用GPS测量数据模拟中国大陆现今地壳水平速度场及应变场

基于连续介质力学理论，提出了直接利用ＧＰＳ测量资料建立地壳运动与形变模型的方法。把整个中国大陆视为由无穷多个微元集合而成的连续介质体，并假定每一个微元体的转动矢量服从统一的、连续的泰勒级数分布，由此引进一组待定参数，称之为地壳运动与形变参数。利用全国网１９９４年和１９９６年的两期ＧＰＳ观测数据，组成矛盾方程组，应用阻尼最小二乘方法，经迭代解算，得到所需要的地壳运动与形变参数。依据这些参数模拟地壳水平速度场及应变场，并将ＧＰＳ结果与地质、地球物理的研究成果作了对比分析，这些结果基本上一致，能相互印证。最后初步探讨了周边板块对中国大陆的作用。

THE CURRENT CRUSTAL HORIZONTAL FIELDS AND STRAIN FIELDS IN THE CONTINENT OF CHINA SIMULATED WITH GPS DATA

Based on the theory of continuous medium mechanics, a method of establishing the model of crustal movement and deformation is presented completely with GPS data in this paper. The whole continent of China is regarded as a continuous medium body composed of a great mount of microbody, and it is supposed that the rotation vectors of the macro bodies abide by the united and continuous Taylor series distribution and a group of undetermined parameters, called the parameters of crustal movement and deformation, is brought in. The inconsistent equations may be formed with the surveying data of the GPS network of monitoring crustal movement and deformation on the continent of China in 1994 and 1996, and by using the damping method of least squares and the interative computing method, the parameters of crustal movement and deformation can be obtained. The crustal horizontal fields and strain fields are simulated according to the parameters. The calculated results are satisfying. Finally, the GPS results are compared with the studying results of geology and geophysics. They are basically accordant and can validate each other. Moreover,the situation of the peripheral plates playing a part in the continent of China is studied preliminarily.