Wednesday, 12 June 2013

Lines Plan..What is Lines Plan (Part 2)...

Assalammualaikum..

Sambung cerita mengenai lines plan..
Isi ni semua aku ambil dekat internet..
Dan ini sambungan untuk entri Lines Plan - What is Lines Plan (Part 1)..

Apa itu Lines Plan?..

In general, drawings that associates with ship buildings can be divided into the following:

  1. Lines Plan Drawing
  2. General Arrangement Drawing
  3. Shell Expansion Drawing
  4. Schematic System Drawing
  5. Detail / Production Drawing
  6. 3-D Product Drawing 
Lines Plan drawing represents the basic outer shape of the ship. Without lines plan drawing, all the either drawing cannot be drawn.

Ship has a complex and unique hull shape due to its double curvature and nonhomogeneous cross sections. Unlike simple object like cylinder, box, and cone which can be represented in simple orthographic drawing, ship hull require special way of representing its unique and complex shape. Not only it require to be shown in three different orthogonal views, more lines are also needed in order to represents its shape at different cross sections or planes. For this reason, the ship hull drawing is always called as Lines Plan Drawing.

Lines Plan is a lines drawing that represent the shape of the ship hull looking from three orthogonal (perpendicular to each other) views i.e. front, side and top views. The front view is termed as Body Plan, the side view is the Sheer Plan and the top view is the Half Breadth Plan. Since all of these views represent the same hull, they are interrelated to each other, thus the preparation of lines plan drawing must follow certain standard procedure.

Lines plan drawing has always regarded by the naval architects as the most important piece of information about the ship. This is due to two reasons i.e. the ship performance and ship design process. On the performance of the ship, the shape of the hull form determines the power required to drive the ship, thus reflect the ship speed, its also determine the amount of pay load (capacity), comfort, habitability, etc. On the ship design process, lines plan drawing is the first information that needs to be made available. Without lines plan drawing, no calculation, design and analysis works can be performed. Construction process also can only be commenced after the lines plan drawing is completed.
 
Pendek kata lines plan ialah lukisan asas untuk pembinaan sesebuah kapal..
Kalau sape2 yang belajar Naval Architecture tu memang akan belajar lagi detail la..
Macam aku ni belajar basic die je..
Kalau budak marine pun akan belajar General Arrangement..
Tapi macam aku belajar nanti akan belajar Offshore Design Assignment..

Pada lines plan ni ada Body Plan, Half breadth plan, Sheer plan dan juga offset table..
 
Body Plan

Body Plan represents the shape of the ship hull when viewing from the front or rear of the ship at every ship stations. Station is a transverse cross-section along the ship length which normally equally spaced. A ship is normally divided into 11 or 21 stations from after perpendicular, AP (Sometimes noted as station 0) until forward perpendicular, FP (or noted as station 10 0r 20). Half or even quarter station may also be used especially at the region with high curvature. Body plan is normally placed at the top right hand side of the drawing although it can also be placed at the middle or on top of the sheer plan drawing depending on the size and type of ship.

Since most ships have symmetrical shape for both port (left side looking from rear) and starboard (right) sides, only one side is shown in the drawing. Therefore, it is almost a standard practice to show the stations of the rear region of the ship at the left side of body plan while the right hand side of the body plan represents the stations at the forward region of the ship. The curve on the body plan is also call station curve. The centre line of the body plan represents the centre line of the ship.
Apart from showing the station curves, the body plan also shows the waterlines and the buttock lines grid. These grid lines are essential not only for reference lines but also used for  transferring and checking data from one plan to another.

 Macam body plan aku ada 21 station dari AP ke FP..
Untuk dapatkan  body plan ada cara nya..
 
Half Breadth Plan

The same hull form if it is viewed from top will produce the plan view of the ship. However since the hull shape is complex and unique, the plan view must be made at several waterline planes. Thus Half Breadth Plan is a lines drawing that represents the shape of the ship hull looking from top view at every waterlines of the ship. Waterline is the horizontal plane that cut the ship along its vertical axis, thus creating the waterlines curves. Waterline is normally equally spaced, although half waterline may also be used at the lower region of the ship. Since the hull is symmetry about its centre line, only half of the hull is shown in this plan.

Apart from waterline curves, the deck line curve needs to be drawn on this plan. If the ship has bulwark, chines or / and knuckles lines, these curves have also to be shown in the drawing. In this plan, the grid lines shown are the stations and buttock lines of the ship.

Dan yang terakhir sekali ialah Sheer Plan..

 Sheer Plan
Sheer Plan which is usually placed at the top left hand side of the lines plan drawing represent the shape of the ship hull looking from the side of ship at several buttock lines. Buttock line is the vertical plane that cuts the ship along its length, creating the buttock line curves. The middle buttock line (normally labeled as BL 0) is the plane that cuts the ship along its centre line which creates the profile curve of the ship. Other buttock lines are drawn outward (offsets) of ship’s centre line and normally at equally spaced distance. The stations and waterlines grids are shown in this sheer plan drawing. 

Ni la serba sedikit mengenai lines plan..
Memang menarik subjek ni..
Sebenarnya aku harap aku bole belajar sampai GA..
Tapi sebab course aku tak de GA dan masa tak pe lah..
Mana tau dah keje nanti ada peluang nak belajar lagi kan..
 Sebabkan subjek ni jugak menimbulkan minat aku untuk mendalami ilmu Naval Architecture dengan lebih lagi..
Bila tengok ada company yang offer Naval Architecture je rasa excited nak join..hehe..
Tunggu la untuk ODA aku nanti..
Mungkin lebih menarik..:)

Aku ambil nota-nota dekat atas ni dari lecture note UTM dari link yang aku bagi dalam entri sebelum ni..
Semua bahan ni sangat membantu aku dalam menyiapkan lines plan aku dan pengetahuan dan pemahaman aku terhadap lines plan..
Terima kasih banyak sebab share nota tu..

Aku kongsikan jugak flow chart macam mana nak buat lines plan ni..
Diharap dapat membantu..
Kalau ada salah silap aku dalam menulis, berkongsi info mohon tegur dan betulkan..




Maaf la flow chart ni buruk je..hehe..
Saiz pun tak sama..
Kenapa entah..huhu..
Untuk lukis flow chart ni aku guna Microsoft Visio..
Guna ni agak senang la nak lukis flow chart..

Semoga apa yang aku kongsikan ni bermanfaat kepada orang yang baca blog ni..
Kalau ada yang berminat nak kongsi ilmu sangat-sangat dialu-alu kan..

Untuk intenrship aku dah mula hantar resume semalam dekat beberapa company..
Harap ada response dan feedback yang baik dari company tersebut..
Dan ada beberapa company lagi yang aku nak cuba hantar resume..:))

Tadi pun aku dah pegi tengok sendiri result untuk lines plan aku..
Alhamdulillah keputusan sangat memuaskan..
Pembakar semangat jugak untuk paper yang lain..
Esok aku ada final untuk subjek COM..
Semoga bole buat dengan baik dan dapat keputusan yang cemerlang..
Amin..



 
 

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