HULL FRAMING SYSTEM (TRANS/LONGI)
The selection of a structural framing system in any vessel must be made from a consideration of weight (TO BE MINIMIZED) , production matters (TO BE ACCESSIBLE FOR WELDING, NDT) , suitability to resist global loads and vibration. Vessels can principally be either transversely or longitudinally frame (DEPEND ON POSITION OF SHIP). There are three type of Hull framing system: Transverse Framing System Longitudinal Framing System Combined or Mixed Framing System (Hybrids framing system) Advantages: Resist Hydrostatic/local loading ( Bow & Engine room area, Cargo hold of Bulk carrier ) Absorb the vibration (E/R, Accommodation) Disadvantages: Heavier than Longitudinal framing system. Much deformation … Continue reading HULL FRAMING SYSTEM (TRANS/LONGI)
Protected: Ship lines and Computer fairing principles. (From history to modern 3D CAD, CFD understanding and application)
There is no excerpt because this is a protected post. Continue reading Protected: Ship lines and Computer fairing principles. (From history to modern 3D CAD, CFD understanding and application)
Protected: SHIP STRENGTH CALCULATION (Part 1 + 2)
There is no excerpt because this is a protected post. Continue reading Protected: SHIP STRENGTH CALCULATION (Part 1 + 2)
SHIP STRENGTH CALCULATION
Visit: Shipbuilding Knowledge A-Z for more free topics on shipbuilding Check the password and visit : Protected: SHIP STRENGTH CALCULATION (2 parts) Continue reading SHIP STRENGTH CALCULATION
Protected: SHIP HULL OPTIMUM MAIN DIMENSION (Example of change in dimension, a coefficient to lower the ship resistance)
There is no excerpt because this is a protected post. Continue reading Protected: SHIP HULL OPTIMUM MAIN DIMENSION (Example of change in dimension, a coefficient to lower the ship resistance)
SHIP RESISTANCE AND PROPULSION
From ship resistance, we can figure out how much power required for Main Engine at a specified speed and what type of propeller should be used. 1st Step: Resistance calculation at a range of operation speed ( Base on Hull basic information, coefficient, proper method) 2nd Step: Initial TOWING power requires for propeller ( base on the Step 1 Resistance, hull form, fluid form, required speed, water density, coefficient ect., ) 3rd Step: Choose Type of Propeller and generate the Initial Characteristic chart ( with Power, RPM, propeller Diameter ) 4th step: Choose M.E with relevant RPM, Power & proper Diameter … Continue reading SHIP RESISTANCE AND PROPULSION
SHIP HYDRO STATIC & STABILITY
Theories and procedures for predicting a ship’s hydrostatic response to various conditions are addressed. Methods for computing the stability characteristics of both intact and damaged ships are studied. Floodable length computations are taught. Stability and subdivision criteria are explained. The lines plan for a hull form is developed and analyzed. A naval architect must have below abilities to generate a good job on this subject: Describe methods for calculating a ship’s hydrostatic properties, including calculation of areas, volumes, centroids, and important hydrostatic parameters such as Δ, LCF, LCB, KB, KM, TPI, MT1. Draw and interpret a ship’s lines drawing. Calculate … Continue reading SHIP HYDRO STATIC & STABILITY
DRAUGHT MARKS AND SURVEYING
The purpose of a Load line or Plimsoll line is to ensure that a ship has sufficient freeboard (the height from the water line to the main deck) and thus sufficient reserve buoyancy (e.g., the enclosed volume created by the area between the water-line and the main deck-line). Note : Do Not confuse with Painting Segregation Line. Normally, the scant draft will be defined as “Painting segregation line” and have same position with full summer load line as below: Scant draft Scantling draft is the maximum draft at which the ship can withstand all the loads safely. In other words, … Continue reading DRAUGHT MARKS AND SURVEYING
Questions and Answers for Marine Engineers
Explain the term water hammer indicating possible effects on the system ? Water hammer occurs when steam is admitted into a cold pipeline. The steam condenses producing both water, and a vacuum (when the water seals the pipeline from the steam supply). This vacuum causes the water plug to be drawn into the closed end of the pipe with increasing velocity producing high impact forces on the pipework. This impact force can be high enough to rupture the pipeline. State how the risk of water hammer may be avoided ? Water hammer is avoided by slowly admitting the steam into the cold line, and draining/venting … Continue reading Questions and Answers for Marine Engineers
AMARINE 