GK/GL
English translation: KG/LCG
| 22:59 Jan 8, 2023 |
| Dutch to English translations [PRO] Tech/Engineering - Ships, Sailing, Maritime | |||||||
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|  Selected response from: Barend van Zadelhoff Netherlands Local time: 03:35 | ||||||
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| 2 | KG/LCG |
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| Discussion entries: 1 | |
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Answers
1 day 8 hrs confidence: 
KG/LCG Explanation: Perhaps the info below helps a bit. GK = de afstand van het gewichtszwaartepunt van het geladen schip tot de bovenkant van de kiel in m; KG = The distance from the centre of gravity (G) to the keel (K) is denoted by KG. GL = het langsscheepse zwaartepunt --> possibly: LCG = Longitudinal Center of Gravity KG = The distance from the centre of gravity (G) to the keel (K) is denoted by KG. http://solr.bccampus.ca:8001/bcc/file/b3c16e08-d327-44fe-aa7... How do you calculate KG of a ship? Calculate KG: KG = VMOM/Mass = 20.528/15.59 = 1.317 m above the base line, BL. https://www.wazeesupperclub.com/what-is-lcf-in-ship-stabilit... Estimating Weight and Moment for Ship Change Document Technical Assessment Team Reviews KG = Vertical Center of Gravity to the Keel – Not to be confused with VCG this is the vertical center of gravity including the thickness of the keel. LMOM= Longitudinal Moment – The product of the weight of an item multiplied by its LCG TMOM = Transverse Moment – The product of the weight of an item multiplied by its TCG. VMOM = Vertical Moment – The product of the weight of an item multiplied by its VCG LGC = Longitudinal Center of Gravity – The center of gravity measured along the ship’s length. Zero reference is typically midship, but can be measured from other known reference points such as the AP and FP. TCG = Transverse Center of Gravity – The center of gravity measured to the port or starboard from the ship’s centerline VCG = Vertical Center of Gravity – The center of gravity typically measured from the baseline of the ship 2.1 Estimate Weight The estimated weight associated with an SCD (Ship Change Document) needs to identify every aspect involved with the change. These aspects include all the weight associated with equipment that is being ripped out, installed, and/or relocated. In addition, weight estimates should include installs and rip outs needed for the execution of the SCD including, but not limited to, cable runs, support racks, and foundations. These are considered changes to the ship’s Light Ship (Condition A) loadout. Installs are considered positive weight additions, while rip outs are considered negative weight removals. Relocations are net zero weight impacts but may have a moment impact. In order to capture the moment changes, separate removal and installation calculations need to be performed. If items are being relocated in relatively small space, calculations may not be necessary. Weight estimates should be made to the nearest pound and indicated as such in the body of the SCD. This is because weight entered in pounds in NDE is automatically converted to long tons in the Weight and Moment Section. When the net weight is less than 11 pounds it appears as 0.00 long tons in NDE. Some frequently asked questions for estimating weight and centers for an SCD can be found in Appendix A. 2.1.1 Changes to Loading Conditions Changes to the ship’s Full Load (Condition D) that are the result of an SCD must also be taken into account. An example of a change to the full load condition would be installation of a new gun mount on the ship which would result in changes in the ship’s ammunition loadout, or new equipment that will require spares onboard that the ship previously did not carry. https://apps.dtic.mil/sti/pdfs/AD1038457.pdf GK = de afstand van het gewichtszwaartepunt van het geladen schip tot de bovenkant van de kiel in m; https://wetten.overheid.nl/BWBR0004196/2002-02-01 GL = het langsscheepse zwaartepunt Langsscheepse stabiliteit 4.1. Het langsscheepse zwaartepunt en drukkingspunt 1. het langsscheepse zwaartepunt GL 2. de afstand XG van GL tot de achterloodlijn wordt voor een beladen vaartuig berekend m.b.v. de momentenstelling Δ x X G = Σ (p i x X gi) 3. het langsscheepse drukkingspunt B L 4. de afstand X B van B L tot de achterloodlijn wordt door de scheepsbouwer berekend i.f.v. de gemiddelde diepgang te vinden in het carènediagram of de hydrostatische tabellen van het schip X B = f (d m) 5. bij een schip in evenwicht bevinden G L en B L zich in hetzelfde verticale vlak 6. een last langsscheeps verplaatsen veroorzaakt een trimmend moment de verplaatsing van GL naar GL' creëert het trimmend moment het trimmend moment doet het schip voor of achterover hellen door het voor of achterover hellen verplaatst B L zich naar B L' het schip helt zover voor of achterover tot B L' onder G L' ligt het trimmend moment neemt af tot nul https://docplayer.nl/25140704-Stabiliteit-inhoudstafel-04-11... LCG = Longitudinal Center of Gravity. A boat will trim until the trimmed LCB is directly below (or above, but in any case vertically in column with) the LCG. If you know a vessel's MT1 (moment to trim an inch, or, in Europe, a cm) you can use the distance between the datum LCB and the actual LCG, times the displacement, to make a first approximation of trim. LCB = Longitudinal Center of Boyancy = The centroid of the underwater volume of the boat expressed as a longitudinal location. Unless otherwise specified LCB is usually understood to be the centroid when the boat is floating on its datum waterline (DWL) with zero trim. https://www.boatdesign.net/threads/help-with-lcg-lcf-and-lcb... 4. LANGSSCHEEPS EVENWICHT (AANVANGSSTABILITEIT). 4.1. Voor het langsscheeps evenwicht is nodig dat de werklijnen van opwaartse kracht en zwaartekracht samenvallen. Of anders gezegd voor evenwicht nodig dat XB = XG, waarbij XB en XG de X-ordinaten zijn van drukkingspunt en massa-zwaartepunt. Zie fig. 5 A. (Eng. : longitudinal centre of buoyancy LCB longitudinal centre of gravity LCG file:///C:/Users/bevan/Downloads/2485.pdf https://en.wikipedia.org/wiki/Ship_stability https://nl.wikipedia.org/wiki/Scheepsstabiliteit |
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