SENSITIVITY ANALYSIS OF WAVE AUTOSPECTRAL ESTIMATES DUE TO TIME AND GEOGRAPHICAL VARIATION IN MALAYSIAN WATERS

As an engineer, design aspects of a structure is definitely vital in construction of buildings as it
determines what engineering considerations are being made in reference to standards to build a
structure. In relation to that, autospectral estimates are considered as an integral when it comes to
design consideration of offshore structures. This tool is considered as the fundamentals in the
computation of values that are set out in design codes and standards. Autospectral estimates does
not only help in computing values for design of structures but as well as operational criteria for
transportation and logistics of vessels and barges. A current spectral model that is being adapted
by Malaysia in reference to the PETRONAS Technical Standard (PTS) is that of the JONSWAP
and Pierson-Moskowitz Spectrum where this spectrum model was derived in the past at a much
aggressive region which are the North Atlantic Ocean and North Sea. Through this understanding
a more conservative spectrum that is appropriate for Malaysian waters must be computed. This
way the design value that are being adapted can be optimized for designing and operational
purposes for offshore and marine activities. With relation to this research project, this report will
be discussing and analyzing on how the derivation of spectral model will be conducted for the
practice in Malaysian waters.