Evaluating the residual structural strength of the ship after the collision accidents using numerical methods

Ship collision accidents are considered of the most serious incidents, due to the subsequent disastrous results both in terms of economic losses in ships and cargo, and the loss of human life as well as the great environmental pollution caused by it. Therefore, continuous efforts are being made by research centers in order to understand the structural response of the hull as a result of these incidents and accurately analyzed. This research is interested in assessing the residual structural strength of a ship exposed to collision through the internal energy and the various structural stresses generated within it. The case is modeled for an oil tanker exposed to collision by the bulbous bow of another vessel moves at different speeds and different angles. The structural strength of the middle section of the struck ship was analyzed based on the numerical methods using Ansys Dynamic Explicit program. Which allowed the development of a clear vision for the structural changes and internal stresses energy with time during the collision process.

Study of Barrier Coulomb, Concept of Trajectory, the Impact Factor, and Grazing Angle in Heavy Ion Collision

We have a detailed analytical study of the Coulomb barrier, the concept of collision factor, the concept of the trajectory, and the concept of grazing angle in a collision between heavy nuclei, and that for many of the symmetrical systems A1 equal A2 and asymmetric systems A1 doesn't equal A2 .The results obtained and presented for the first time in this way, help to differentiate between the electric interaction and the nuclear reaction, and then determine the energy ejaculation that should be used in order to show the interaction to be studied. On the one hand, on the other hand this helps to choice the detector (or detectors) that must be used in experimental work, and then where to put this detector (or these detectors).