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- W655749879 abstract "The current work investigates the slamming characteristics of wave piercing catamaransthrough the analysis of sea trials data of the 98 m Incat sea frame “Hull 061”, built inTasmania, Australia and currently serving in the US Navy combat fleet. The importance ofthis sea trials data is that the ship was tested in severe sea conditions to assess her suitabilityfor military operations and to define her operational envelope. New signal processingtechniques such as Wavelet Transforms are used in analysing slamming data for two mainpurposes, slamming identification and modal analysis in time and frequency domainssimultaneously. The Wavelet Transforms were found superior to conventional signalprocessing tools such as Fast Fourier Transform and Short Time Fourier Transform.The structural strength of wave piercing catamarans is studied by introducing a novel seatrials analysis for structural performance assessment in an attempt to simulate real loadingconditions. The methodology was tested on normal linear wave loading (withoutslamming) and was found satisfactory. A “Reverse Engineering” approach is introduced topredict slamming loads during sea trials by using the capabilities of Finite Element Analysisusing the well known software PATRAN/NASTRAN1. To increase the efficiency of thisapproach, the load parameters, spatial location and distribution, were investigated throughmodel tests of a similar but larger 112 m Incat hydro-elastic model in the AustralianMaritime College towing tank facility. Based on pressure measurements, proper slam loadmodels can be more accurately and efficiently introduced in the finite element analysis.Quasi-static analysis was first performed to examine its suitability to analyse such fast timevarying loads. Difficulties in comparison procedures between numerical simulations andtrials data have strongly highlighted the need for dynamic analysis. Direct transient dynamicanalysis was performed using the dynamic solver of the same software package. Goodagreement with trials data was found. The suggested procedure and slamming loadingpatterns used in the numerical simulation is then verified and can be regarded as a solidbase for verification of other theoretical design models." @default.
- W655749879 created "2016-06-24" @default.
- W655749879 creator A5024214728 @default.
- W655749879 date "2009-05-01" @default.
- W655749879 modified "2023-09-27" @default.
- W655749879 title "Non-linear unsteady wave loads on large high-speed wave piercing catamarans" @default.
- W655749879 hasPublicationYear "2009" @default.
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