Time domain wave load extreme value extrapolation method based on truncated sample and three-parameter distribution

The invention relates to a time domain wave load extreme value extrapolation method based on truncated samples and three-parameter distribution. The method is characterized by comprising the following steps of: extracting an amplitude sample of an original time calendar; removing a set number of small amplitude samples to obtain truncated samples (x1, x2,... xm) after truncation; selecting the truncated samples (x1, x2,... xm) obtained by fitting three-parameter generalized extreme value distribution G (x; sigma; gamma; mu), wherein a probability weight moment method is adopted to estimate the dimension parameter sigma, the shape parameter gamma and the position parameter mu; and obtaining an extrapolation extreme value X of the corresponding wave load. The invention provides the wave load extreme value extrapolation method, which gives consideration to reasonability, stability and accuracy. Compared with the prior art, the method has the advantages of being reasonable in amplitude extraction, appropriate in