An experimental investigation into whole body vibration generated during the hydroelastic slamming of a high speed craft

作者：Halswell P K^*; Wilson P A; Taunton D J; Austen S

来源：Ocean Engineering, 2016, 126: 115-128.

DOI：10.1016/j.oceaneng.2016.09.002

• Whole body vibration
• Mechanical shock
• High speed crafts
• Rigid inflatable boats
• Inflatable boat
• Hydroelastic
• Slamming
• Drop tests

High-Speed planing Craft (HSC) expose their crew to high levels of vibration that regularly exceed the daily exposure limit set out by European directive 2002/44/EU; highest accelerations occur during a slam. Many Whole Body Vibration (WBV) reduction strategies are being researched (e.g. suspension seats), but Coats et al. (2003) and Coe et al. (2013) concluded that a combination of methods is required to reduce the level sufficiently to meet legislation.
This paper describes an experimental investigation to determine whether hydroelasticity can affect the WBV of HSC using quasi-2D and full-scale drop tests. The quasi-2D tests revealed that hydroelasticity affected peak acceleration and Vibration Dosage Value (VDV), and that a wooden hull generated higher magnitude WBV than fabric hulls. The full-scale drop tests employed an inflatable lifeboat and the internal pressures of the sponson and keel controlled the hydroelasticity. The full-scale results showed that peak acceleration and VDV reduced while decreasing the internal pressures at the transom and crew locations; however, peak acceleration and VDV increased at the bow. Furthermore, the ability of fabric structures to reduce the mass of HSC is discussed. Incorporating hydroelasticity shows potential, alongside other reduction strategies, to alleviate human exposure to vibration of HSC.

• 出版日期2016-11-1