海底沉积物物理参数声速反演方法研究

海底沉积物的物理参数是海洋资源勘探开发、工程施工的重要参数。基于Gassmann理论,采用改进遗传算法,以海底沉积物实测纵波速度矩阵与预测纵波速度矩阵差的2范数作为目标函数,建立了由海底沉积物纵波声速反演海底沉积物密度、孔隙度和泊松比的反演方法。经过模型数据与实际资料应用,检验了方法的正确性。该方法可为海底工程、海底资源勘查提供技术支撑。

Acoustic Inversion method of physical parameters of seafloor sediment*

The physical parameters of seabed sediments are important parameters for the exploration and development of marine resources and the construction of the project. The inversion method of density, porosity and Poisson"s ratio of seafloor sediment using compression wave velocity data based on Gassmann theory and improved genetic algorithm is established by this paper. The paper uses 2 norm of the difference between measured P-wave velocity matrix and prediction of P-wave velocity matrix as the objective function. The correctness of the method is tested through the application of the model data and the practical data. This method can provide technical support for submarine engineering and seabed resource exploration.