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Showing 1 to 20 of 31 for “"Slamming"”.
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Slamming of High-Speed Craft: A Machine Learning and Parametric Study of Slamming Events
Slamming loads are the critical structural design load for high-speed craft. In addition to damaging the hull structure, payload, and injuring personnel, slamming events can also significantly limit operating envelopes and decrease performance. To better characterize slamming events and the factors …
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Elastic-plastic hull plate response to slamming induced pressures
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1992 and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1992.
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Slamming of High Speed Craft: A Parametric Study of Severe Cases
High-speed planing craft slamming into waves can cause structural damage to the vessel as well as hinder or injure personnel onboard. As a result, it is one of the primary constraints that limit the operating envelope of high-speed surface vessels. The controlled motion experiments presented in …
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Analysis of Instabilities in Microelectromechanical Systems, and of Local Water Slamming
… regions of instabilities. The local water slamming refers to the impact of a part of a ship hull on stationary water for a short duration during which high local pressures occur. We simulate slamming impact of rigid and deformable hull bottom panels by using the coupled Lagrangian and …
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Shaking, slamming, and vibrating yield-stress fluids: Inducing particle motion in rheologically-complex materials
Made available in DSpace on 2018-03-13T15:25:20Z (GMT). No. of bitstreams: 9 KOCH-DISSERTATION-2017.pdf: 50624702 bytes, checksum: f3e68c494df9420b9f4d386c1b05f99c (MD5) jakoch2_LaTeX_src.zip: 52005063 bytes, checksum: 9af5cc375da07488897271c67c680e44 (MD5) LICENSE.txt: 4208 bytes, checksum: …
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Slamming analysis of skips in mine shafts: the effect of secondary stiffening in the guides
… mine shafts have led to the identification of slamming as a phenomenon that results in exceptionally high forces in the shaft steelwork and conveyance. Slamming may occur when the rollers on the skip, that normally act on the guide, fail. Possible damage caused to the shaft steelwork, as a …
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Slamming into the visceral pleasure of language : the value of disordered spaces and its impact on contemporary vocal landscpes
The premise of this research is that the creation of a disordered space will have a positive effect on the stimulation of a physical response to spoken language. In a disordered space, vocal delivery is foregrounded as physical activity and has a re-patterning effect on the vocal landscapes of …
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Slamming into the visceral pleasure of language: the value of disordered spaces and its impact on contemporary vocal landscapes
The premise of this research is that the creation of a disordered space will have a positive effect on the stimulation of a physical response to spoken language. In a disordered space, vocal delivery is foregrounded as physical activity and has a re-patterning effect on the vocal landscapes of …
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Hydroelasticity of High-Speed Planing Craft Subject to Slamming Events: An Experimental and Numerical Investigation of Wedge Water Entry
… waves are subject to frequent water impact, or slamming, as a portion or whole of the craft exits the water and re-enters at high velocity. The global load induced by slamming can cause fatigue-related damages to structures. The local slamming can cause local damage to structures and its induced …
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Local Water Slamming of Nonlinear Elastic Sandwich Hulls, and Adiabatic Shear Banding in Simple Shearing Deformations of Thermoelastoviscoplastic Bodies
… of flexible curved hulls due to water slamming loads. The water is assumed to be inviscid and incompressible and undergo irrotational deformations. The Laplace equation for the velocity potential is numerically solved by the BEM with normal velocity and pressure assumed to be continuous …
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Vibration problems of skips in mine shafts : the effect of compressive forces in the guides
… mining shafts have led to the identification of 'slamming' as a significant event in the initiation of large perturbations in the motion of the skip. Slamming occurs when the flexible rollers on the skip which normally act on the guides are inoperative. The primary concern is that this slamming …
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Mechanics of Flexible Composite Hull Panels Subjected to Water Impacts
… speed small craft. These impacts, referred to as slamming, generate highly dynamic loads, which have both local and global effects. This work focused on obtaining high quality measurements of the loading and responses of flexible hull panels during slamming events. Significant research into …
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Hydor-impact, fluid-structure interaction and structural response of modern racing yacht
… impact or ’hydro-impact’ phenomenon by<br/>slamming.<br/><br/>The structural failure by hydro-impact originates from the facts that the external<br/>hydro-impact load and fluid structure interaction effect is somewhat misled and when<br/>applying the load into current structural design, the …
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Time domain simulation of hydroelastic response of ships in large amplitude waves
… wetted surface. Non-linear forces due to slamming (bottom impact and flare) and green water (treated in a quasi-static manner) are also added. One aim of the thesis is to investigate the influence/importance of each of the non-linear hydrodynamic forces. Furthermore, the effects of …
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An Experimental Study of the Fluid- Structure Interactions of Water Entry of Compliant Structures
… been an important concept in the study of the slamming of small high-speed craft with flexible bottom structures, such as those made of composites. In this work, this fluid-structure interaction problem is experimentally investigated in different stages. In Stage I, free-falling water entry …
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An evaluation of finite element models of stiffened plates subjected to impulsive loading
… most appropriate for analyzing a ship deck under slamming conditions. The plate modeled with 4-node shell elements and the stiffeners modeled with 2- node iso-beam elements are shown to yield excellent results while requiring reasonable computational resources. In addition to the evaluation of the …
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Numerical and experimental analysis of initial water impact of an air-dropped REMUS AUV
… as seaplane landings, torpedo drops, and ship slamming. In this study, a numerical model has been constructed to estimate the hydrodynamic impact loads of a REMUS dropped in free-fall from a helicopter in a low hover. Developed by von Alt and associates at Woods Hole Oceanographic Institution, …
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On the impact of arbitrary two-dimensional sections
When an object drops into the water a slamming load with high pressure on the body happens. Such an impact force often causes serious structure damage to the ships and offshore structures. The study of the water-entry impact problem is thus of fundamental interest and practical significance in …
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Application and analysis of stiffened side shell panel failure for naval patrol craft
… to each case, including considerations for slamming and saltwater corrosion.
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Cavity dynamics of water entry for spheres and ballistic projectiles
… speeds. Industrial applications include ship slamming, extreme waves and weather on oil platforms, sprayed adhesives, paint aerosols and ink jet printing. In the field of naval hydrodynamics there is particular interest as these problems relate to the study of the water entry of mines and …
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