Recently, the great enlargement of container ships has brought broad concern on the effect of whipping response. Meanwhile, the accompanying wider width of double bottom may cause more flexible responses of the double bottom structures. The numerical simulation studies have shown that the longitudinal stresses of the hold central bottom of a container ship due to the double bottom bending superimpose on the longitudinal stresses due to hull girder bending in both wave response component and vibrational response component. In this research, the authors firstly extract the full scale measurements data whose sea states are closest to that of numerical simulation among existing time series, with the purpose of analyzing correlation between double bottom bending and hull girder bending in wave response and vibrational response. As a result, studies from full scale measurements well verified the phenomenon that double bottom of larger container ship responds to forced vibration due to whipping excitation as observed in theoretical studies. Then, the statistical characteristics of correlation factor between hull girder bending stress and double bottom bending stress were investigated, based on relatively large number of data with regard to wave height and relative wave direction, as well as the classification between low- and high-frequency-dominant response cases. All these studies may contribute to future optimized operation, maintenance and design of ship.

中文翻译：

---

基于全尺度测量的鞭打相关双底响应及其统计特性研究

近来，集装箱船的大幅扩大，引起了人们对鞭打响应效果的广泛关注。同时，随之而来的双层底更宽的宽度可能会导致双层底结构的响应更加灵活。数值模拟研究表明，在波浪响应分量和振动响应分量中，双层底弯曲引起的集装箱船货舱中心底部的纵向应力叠加在船体梁弯曲引起的纵向应力上。在本研究中，作者首先提取了现有时间序列中海况最接近数值模拟的全尺度测量数据，目的是分析双层底弯曲与船体梁弯曲在波浪响应和振动响应中的相关性。因此，全尺寸测量的研究很好地验证了理论研究中观察到的大型集装箱船的双层底对由于鞭打激励引起的强制振动做出响应的现象。在此基础上，基于海浪高度和相对波向的大量数据，以及低频和高频的分类，研究了船体梁弯曲应力与双层底弯曲应力相关因子的统计特征。 - 主要反应案例。所有这些研究都可能有助于船舶未来的优化操作、维护和设计。研究了船体梁弯曲应力与双层底弯曲应力之间相关因子的统计特征，基于海浪高度和相对波向的大量数据，以及低频和高频主导的分类响应案例。所有这些研究都可能有助于船舶未来的优化操作、维护和设计。研究了船体梁弯曲应力与双层底弯曲应力之间相关因子的统计特征，基于海浪高度和相对波向的大量数据，以及低频和高频主导的分类响应案例。所有这些研究都可能有助于船舶未来的优化操作、维护和设计。