Do you want to publish a course? Click here

Studying the dynamic behavior of the rolling ship on irregular waves (Tow Dimension spreading)

دراسة السلوك الديناميكي للسفينة المتأرجحة عرضياً على الأمواج الحقيقية (عند الانتشار ثنائي البعد للأمواج)

1532   1   47   0 ( 0 )
 Publication date 2016
  fields Marine Engineering
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

Studying of the dynamic behavior of the rolling ship on sea waves is one of topics of special interest due to its close association with the ship stability and its direct impact on the efficiency of the work of some of the systems and processes inside the hull. This paper includes an explanation of the proposed mathematical model to study the dynamic behavior of the rolling ship on irregular waves in order to calculate the curves as a function of ship breadth at different values of ship speed, bearing angle and metacenter high, and thus determine the ship speed and bearing angle that causing resonance at defined value of metacenter high. In addition to determine the critical breadth coincide with the design speed of the ship. A computer program was prepared to perform calculations according to the proposed model, which allowed studying the effect of some parameters of the investment of the vessel (ship speed, and the angle of its route for the main direction of spread of the waves) on ship rolling. It had been reached through this research to extract mathematical equations which allow a precise and clear explanation of the dynamic behavior of the ship rolling on waves.



References used
KOBYLINSKI, L. K; KASTNER, S. Stability and Safety of Ship . Elsevier, USA, 2003, 412
BLAGOVESHCHENSKY, S. N.Theory of ship motions . Dover, New York,1962,649
MOLLAND, A. F.Maritime Engineering Reference Book . Butterworth- Heinemann, Oxford, 2008, 907
rate research

Read More

The study of the dynamic behavior of the rolling ship on sea waves is one of most interesting topics, due to its close association with the ship stability and its direct impact on the efficiency of the work of some of the systems and processes inside the hull. This research includes an explanation of the proposed mathematical model to study the dynamic behavior of the rolling ship on regular sinusoidal waves in order to calculate the Transfer Function of ship response continued to the act of wave-induced transverse oscillation and thus determine the frequency of resonance and the maximum value for the Transfer Function. A computer program was prepared to perform calculations according to the proposed model, which allowed studying the effect of some parameters of the investment of the vessel (ship speed, and the angle of its route for the main direction of spread of the waves) at a frequency of resonance and the maximum value for the Transfer Function, and also allowed to study the effect of Some of the parameters of the surrounding medium (wave frequency) to the maximum value for the Transfer Function. Through this research, it had been reached to extract mathematical equation which allows a precise and clear explanation of the dynamic behavior of the ship rolling on waves.
This article aims to the model the influence of geometrical errors (eccentricity and alignment errors) on static and dynamic behavior of helical geared transmission by studying its influence on the load and the transmission errors. For this propos , a dynamic model is developed to geared transmission with 36 degree of freedom (tension –compression , torsion and bending). The equations of motion are solved by combining a time-step integration algorithms with several iterative and Newmark's method .
Summary of subject lines like all components of the electrical power system, for unexpected breakdowns for multiple reasons. This reduces malfunctions of the reliability of the system, and is a source of threat to the continuity of power supply. In order to prevent these crashes completely is not feasible, you must design an integrated protection system is being coordinated action among all its organs to identify and separate the holidays quickly so the damage caused by this failure the system capacity as possible. Network protection devices are installed to protect it from faults that may occur, and prevent their spread and protect the system from un normal operating situations resulting from such faults. protection systems to identify, classify and locate of faults through systematic analysis of network parameters) voltages/currents, (and then send a signal to circuit breakers on separation to separate and isolate the infected component. This thesis took up the study of The effect of wind plants connection on protection system in distribution networks on behaviour of protection devices used should (over current) and compare the results with those protections work behavior when connection with regular generators. we found through modeling and simulation results that a wind station to impose changes on the structure of power system of protection zones and protection devices in response to the types of faults occurring and the reason for the delay in the work of these protections.
The study of the phenomenon of ship squat in vessels can be considered as one of the most important topics in ships hydrodynamic science, because it is related to the marine secure, especially now after the rapid increase in size of vessels and ope ration speeds. In literatures there are methods that are used to predict ship squat. This research aims to develop a 3D Numerical Modeling to analyze the phenomenon of ship squat of the ship in Canals using computational numerical method and proper software, to extract the velocity and pressure fields of the flow around ship hull. The last one affect directly this phenomenon. To build a 3D model and to represent ship squat for viscous flow, simulation has been developed using Gambit and Ansys Fluent programs. ship squat has been integrating the motion of water level drop. The effect of vessel speed and blockage factor Cb have been taken into account. Results confirm the efficiency of the CFD for simulating ship squat. The comparison with other experimental and computational methods show good accuracy.
Bleaching process of cotton fabrics consider an important and sensitive operations in wet chemical treatments of cotton fabrics, mercerization is not less important than them and that in cases in which is made necessary, but from the problems of t hese processes are long time and consumption of energy, but the ultrasound energy contribute to reduce these problems.
comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا