a structural engineer. During this time he was responsible for structural design loads for the X-22A VTOL research airplane; SKMR-I, the Navy's first large air cushion vehicle; and the SES-IOOB surface effect ship. After joining the Structures Department of the David Taylor Research Center in 1971 he conducted hydrofoil ship loads research and later supported the PHM procurement program. In 1978 he initiated a loads research program for displacement ships with emphasis on casualty analysis, statistical analyses of non-linear random processes, extreme wave characteristics, and most recently climatic and extreme spectra for use in determining long-term structural loadings. In 1982 he received a master's degree in ocean and marine engineering from The George Washington University, He is a member of ASNE, SNAME, and Sigma Xi, and is currently chairman of the SNAME Hull Loading Panel (HS-I).ABSTRACT Long-term measurements of wave spectra from 16 NOAA data buoys have been used to define extreme and climatic wave spectra. The NOAA buoys are deployed off the U.S. East Coast from the Gulf of Maine to the Georgia Embayment, in the Gulf of Mexico and from California to south of Kodiak, Alaska with as many as 55,000 spectra being available from a single buoy station. The basis on which an envelope of extreme values of significant wave height (Hm,) and modal frequency (fp) was established is described and comparisons made with selected other data bases. The basis for establishing long-term average, i.e. climatic wave spectra, is described together with examples of such data for the "steep" wave climate off the East Coast and the ''long'' wave climate off the West Coast. Examples of parametric approximations to climatic spectra are provided as well as selected characterizations of the respective wave climates. It is found that the Ochi (3P) spectrum formulation is especially useful in approximating a wide variety of climatic wave spectra whereas the utility of the Bretschneider formulation is much more limited. An empirical basis is provided for defining Ochi (3P) spectra when only Hm, and f,, are known.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.