Ota, DaichiDaichiOtaKuroda, TakakoTakakoKurodaHoutani, HidetakaHidetakaHoutani2021-03-102021-03-102019-0911th International Workshop on Ship and Marine Hydrodynamics (IWSH2019), Paper 60http://hdl.handle.net/11420/9028In a model test aimed at investigating statistically the ship response in an actual sea condition, it is needed that the short-crested irregular waves are generated for a long duration. The characteristics of the wave field should be kept unchanged in time. In this study, the authors have investigated the temporal variation of a short-crested irregular wave field in an experimental wave basin. An experiment of wave generation was carried out in the Actual Sea Model Basin (ASMB) of National Maritime Research Institute in Japan. Wave elevations were measured with six wave gauges to estimate the directional spectrum. In order to evaluate quantitatively the temporal variation of the wave field, the authors introduced the indicators of the wave spectrum shape such as significant wave height, mean wave period, mean wave direction, and mean spreading angle. The authors evaluated the temporal variation of the experimental wave field generated in the ASMB by using these indicators. In addition, the variation of the proposed indicators of the wave spectrum shape due to the development of the reflected wave along with wave generation time was investigated by numerical simulation. The introduction of these wave parameters allowed us to quantify the temporal variation of wave fieldsenhttp://rightsstatements.org/vocab/InC/1.0/Directional spectrumIrregular wavesWave basinTechnikIngenieurwissenschaftenConference Paper10.15480/882.335410.15480/882.3354Fluiddynamik und Schiffstheorie M-8Other