The invention discloses a ship wave load equivalent design wave determination method under a six-level sea condition, and relates to the field of ship structure safety, and the method comprises the following steps: regarding a ship body as a variable cross-section beam, for a ship with a certain navigational speed, calculating a wave load transfer function at the section of the ship body beam under different wave conditions, the wave conditions comprise different wave direction angles and different circular frequencies of incident waves; based on the wave load transfer function at the section of the ship body beam, calculating wave load short-term forecast extreme values under different wave direction angles and different zero-crossing periods within a sex-level sea condition sense wave height range; a maximum value is selected from all the short-term forecast extreme values of the wave loads, equivalent design wave parameters of the wave loads under the six-level sea condition are determined on the basis of the maximum value, the equivalent design waves are sine regular waves, and the parameters comprise the wave amplitude, the circular frequency and the wave direction. The research on the load suffered by the ship body under the random wave is converted into the research on the ship body load under the regular wave, so that the method has important significance on follow-up research on the ship body load level and structural safety.
本发明公开了一种六级海况下船舶波浪载荷等效设计波确定方法,涉及船舶结构安全领域,该方法包括:将船体视为变截面梁,对于航速一定的船舶,计算在不同波浪条件下的船体梁剖面处的波浪载荷传递函数,波浪条件包括入射波浪的不同浪向角和不同圆频率;基于船体梁剖面处的波浪载荷传递函数,计算六级海况有义波高范围内不同浪向角、不同跨零周期下的波浪载荷短期预报极值;从所有波浪载荷短期预报极值中选出一个最大值,基于最大值确定六级海况下波浪载荷的等效设计波参数,该等效设计波为正弦规则波,参数包括波幅、圆频率和浪向。通过将随机波下船体遭受的载荷研究转化为规则波下船体载荷研究,对于后续研究船体载荷水平与结构安全性有重要意义。
Method for determining equivalent design wave of ship wave load under six-level sea condition
一种六级海况下船舶波浪载荷等效设计波确定方法
2025-03-18
Patent
Electronic Resource
Chinese
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