Author: Amarine Antonio

Shipbuilding and welding professional.
BASIC THEORIES1 Comment

2nd-Order Linear Differential Equations (2ndLDE)

Amarine Antonio

2nd-Order Linear Differential Equations – 2ndLDE A differential equation (DE) is an equation involving a function f(x) and its derivatives (x). (Phương trình Vi Phân tuyến tính cấp 2 – Vietnamese. Phương trình) Phương trình vi phân là 1 phương trình chứa biến độc lập x, hàm cần tìm là y = f (x) và các phương trình chứa biến x  như P(x) Q(x) và các cấp đạo hàm của nó.  Let’s forget what you have learned about Math during university 🙂 In Mechanical/Electrical engineering and Rotating equipment, the 2ndLDE is the most application in calculation of vibration, oscillation and circuit. Through this chapter, you … Continue reading 2nd-Order Linear Differential Equations (2ndLDE)

HULL1 Comment

HULL FRAMING SYSTEM (TRANS/LONGI)

Amarine Antonio

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)

BASIC THEORIES1 Comment

SHIP RESISTANCE AND PROPULSION

Amarine Antonio

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

BASIC THEORIES, Shipbuilding A-Z2 Comments

SHIP HYDRO STATIC & STABILITY

Amarine Antonio

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

SHIP SURVEY9 Comments

DRAUGHT MARKS AND SURVEYING

Amarine Antonio

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