development of a numerical model which describes launching of offshore jackets from barge is presented in this paper. in this model, in addition to capabilities of commercial softwares, water entry forces on jacket members and an implicit newmark solution technique are included. the results are in general agreement with other numerical software’s available (sacs). fluid forces acting on jacket ...

Development of a numerical model which describes launching of offshore jackets from barge is presented in this paper. In this model, in addition to capabilities of commercial softwares, water entry forces on jacket members and an implicit Newmark solution technique are included. The results are in general agreement with other numerical software’s available (SACS). Fluid forces acting on jacket ...

Free-falling objects impacting onto water pools experience a very high initial impact force, greatest at the moment when breaking through free surface. Many have intuitively wondered whether throwing another object in front of an important (like oneself) before surface may reduce this force. Here, we test idea experimentally by allowing two spheres to consecutively enter and measuring forces on...

The effect of the asymmetric water entry over a submerged part of a ship on the hydrodynamic impact is investigated numerically. A wedge body is considered to study and the problem is assumed to be two-dimensional. The Results of symmetric and asymmetric impacts are compared together. The effect is found significant in the numerical simulation. The maximum hydrodynamic pressure at a heel angle ...

In this paper, the characteristics of impact pressure and force a trimaran section was studied by Computational Fluid Dynamics (CFD). The time domain features slamming or showed strong correlation with penetration depth regardless specific ways water entry. effects velocity acceleration on were analyzed. It found that initial main hull wet-deck predominantly affected entry velocities, whilst ha...

BACKGROUND AND OBJECTIVES Trocar insertion injury has a high morbidity, mortality, and cost. The purpose of this study was to compare standard trocar entry with our reduced-force closed trocar entry technique by measuring trocar insertion force using a mechanical force gauge. METHODS In the operating room, the force gauge was inserted into a sterile glove and connected to the proximal portion...