Patent ID: 11966001
Assignee: FIRST INSTITUTE OF OCEANOGRAPHY, MNR
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 0:
1. A calculation method for a seabed reflection coefficient of point source elastic wave, comprising the following steps:
step 1: initializing a calculation accuracy and a calculation range of the seabed reflection coefficient;
step 2: discretizing a parameter space and obtaining the seabed reflection coefficient of point source elastic wave;
step 3: combining an equivalent equation with a traditional calculation equation for the seabed reflection coefficient of point source elastic wave; wherein the equivalent equation and traditional calculation equation for the seabed reflection coefficient of point source elastic wave are combined by the following equation:

f(W,m)=r←r′  (1),

in equation (1), f (w,m)=r represents the equivalent equation, W is an undetermined coefficient of the equivalent equation, r is the seabed reflection coefficient, ← represents an assignment to a variable, and r′ is the seabed reflection coefficient obtained by the traditional calculation method for the seabed reflection coefficient of point source elastic wave; the combination is performed within a parameter space range to obtain the following:

f(W,M)=R  (2),

in equation (2), R is the seabed reflection coefficient of point source elastic wave;
step 4: solving the undetermined coefficient of the equivalent equation in step 3 with the following equation:

W=G−1R  (3),

in equation (3), G is a symmetric matrix Gij=φ(mi,mj) composed of Gaussian kernel function, i,j∈{k|k>0&k∈N}, R is the seabed reflection coefficient of the point source elastic wave;
step 5: obtaining a concise expression for the seabed reflection coefficient of point source under an accuracy in step 1 with the following equation:

r=g(m)·W  (4),

in equation (4), g(m)=[φ(m1,m)φ(m2,m) . . . φ(mi,m)], W is the undetermined coefficient of the equivalent equation;
step 6: calculating the seabed reflection coefficient of point source elastic wave within a given calculation accuracy range using an obtained expression in step 5.