The wave crest is an important factor for the design of both fixed and floating marine structures. Wave crest height is a
dominant parameter in assessing the likelihood of wave-in-deck impact and resultant severe damage. Many empirical and theoretical
distribution functions for wave crest heights have been proposed, but there is a lack of agreement between them. It is of
significance to develop a better new nonlinear wave crest height distribution model. The progress in the research of wave
crest heights is reviewed in this paper. Based on Stokes’ wave theory, an approximate nonlinear wave crest-height distribution
formula with simple parameters is derived. Two sets of measured data are presented and compared with various theoretical distributions
of wave crests obtained from nonlinear wave models and analysis of the comparison is given in detail. The new crest-height
distribution model agrees well with observations. Also, the new theoretical distribution is more accurate than the other methods
cited in this paper and has a greater range of applications. 相似文献
The densities of 36 water samples from the Huanghe River estuary and Bohai Bay were determinedby a magnetic float densimcter under three temperatures from 15℃ to 25℃.All the measured densities ofsamples were greater than that of the values calculated from the International Equation of State of Seawater.The differences between the measured and calculated densities increased with the decrease of salinities.The dif-ferences appeared exponentially correlated with[Ca~(2+)]/s,[Mg~(2+)]/s and[SO_4~(2-)]/s,and had"s"type curverelationship with the alkalinity in all salinity range.But in the salinity ranging from 25.72 to 31.57,therelationships were all linear.The density difference can be estimated from the equation △ρ(10~3kg·m~(-3))=(-2.79+236.5([Ca~(2+)]/s)/(-9.7464×10~(-3)+[Ca~(2+)]/s).It was the high alkalinity and[Ca~(2+)]/s that resulted in the measured densi-ties of seawaters being higher than the calculated densities in the Huanghe estuary and Bohai Bay. 相似文献