Seagoing Tug 2nd Design by Rongchao Li https://padlet.com/r_li1/l3f5v3lrdkzw Based on Seagoing tug from LV en-us 2016-12-07 18:27:38 UTC 2023-03-03 20:16:54 UTC hello@padlet.com 2.1 Plan maken r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142380466 Remarks of first design ]]> 2016-12-07 18:27:53 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142380466 2.1 Plan maken r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142388866 Work plan]]> 2016-12-07 18:51:39 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142388866 2.1 Study 1st Design and Work Plan r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142389168 2016-12-07 18:52:32 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142389168 2.2 Blog design process r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142389396 2016-12-07 18:53:13 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142389396 2.3 Stability rules and regulation r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142389508 2016-12-07 18:53:32 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142389508 2.4 PIAS stability analysis r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142389650 2016-12-07 18:53:54 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142389650 2.5 Resistance and propulsion r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142389920 2016-12-07 18:54:36 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142389920 2.6 Propulsion system design r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142390084 2016-12-07 18:55:01 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142390084 2.7 Production Aspect r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142390338 2016-12-07 18:55:34 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142390338 2.8 Report and presentation r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142390492 2016-12-07 18:55:55 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142390492 Week 1 r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142390898 On the website www.tumblr.com an account is made on Week 1 and the first message is put there for a test. The intention is to use the blog as a diary of the new design iteration following the defined Work Plan. 
However, Padlet can also be used to put the messages directly herein.]]> 2016-12-07 18:57:00 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142390898 Week 2 r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142391707 It is realized that before the adaption of the design, the following questions are raised which need to be investigated to give directions and necessary input for adaption of main particulars.  
  1. The length of the tug from the original design is 75m, which seems fairly longer than normal tug boats. Therefore some reference vessels shall be investigated to deepen the understanding. 
  2. Is it a normal practice of tugs to pull the assisted large size offshore vessels in ice area? 
  3. Further investigate reference vessels of sea going tugs with ice class on the following aspects:
    • propulsion systems are used: engine power, engine types, main and auxiliary engines
    • propellers and bollard pull, speed
    • fuel storage and endurance 
    • deadweight and GT
    • POB and autonomy 
    • usage of ballast water 
  4. Based on above investigation to determine the new main dimensions and characteristics of the Tug. This will be the base to determine or estimate input to PIAS stability analysis. 
The investigations and findings are address in Chapter 3.1 and resulting adaption of the main particulars and GA are described in Chapter 3.2 and Chapter 3.3. GA will be drawn later on in parallel to PIAS stability analysis.
]]> 2016-12-07 18:59:05 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142391707 Week 3 r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142392596 When the main dimensions are defined,  a rough hydrostatic analysis is done on excel sheet to elaborate the main dimensions, displacement and deadweight. 

Afterwards, three times lines plan are input to PIAS Hulldef module due to the following reasons:
  • Original lines plan is input (Week 1)
  • Lines plan is scaled according to 1st Design  (Week 2) 
  • Lines plan are scaled according to adjusted main dimensions of 2nd design (Week 3). 
Quite some hours are spent on the determination of the VCG of the tug. The hull shell and bottom steel weight is referred to the first design which is scaled up to the new dimensions. Remaining hull weight including coating, insulation, accommodation, etc. as well as the equipment weight and COG are estimated based on reference vessel data, main equipment supplier’s data and previous project experience being a design and cost estimation engineer. Results are shown in Chapter 5.2. 
]]> 2016-12-07 19:01:29 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142392596 Week 4 r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142393367 To be able to give input to PIAS loading module, standard loading conditions are defined in Chapter 5.2. PIAS loading module is then explored and Intact stability is checked. Results are address in Chapter 5.3. It is understood that in this phase of study only basic intact stability requirements will be explored, so that other conditions relating to free surface effect, weather critieron, ice allowance, towing heeling moment etc. are out of the scope of study. 
It is however concluded that the tug boat is very stable and will not topple even at maximum allowable heeling angle of 85 degree. But it is hard to say what will happen when towing deduced heeling moment is also introduced. 
Besides, it is possible to consider to reduce the beam of the vessel, detailes see Chapter 5.3. This is noted as attension point in the coming period of time.
]]> 2016-12-07 19:03:27 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142393367 Class Notations r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142394906 2016-12-07 19:07:08 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142394906 Summary Stability Requirements r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142395656 2016-12-07 19:09:02 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142395656 Understanding Seagoing Tug and revision of design r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142396549 2016-12-07 19:11:02 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142396549 Reference vessels r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142396924 2016-12-07 19:12:00 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142396924 Azipods on Tugs r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142397495 2016-12-07 19:13:28 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142397495 2nd Design outline r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142398066 2016-12-07 19:14:57 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142398066 Main dimensions and hydrostatics r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142398473 2016-12-07 19:16:03 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142398473 PIAS Lines Plan r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142399409 2016-12-07 19:18:31 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142399409 Estimate LSW and VCG r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142400219 2016-12-07 19:20:37 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142400219 Tank division and Loading conditions r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142400600 2016-12-07 19:21:34 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142400600 PIAS output Righting level curve r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142401085 2016-12-07 19:22:54 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142401085 PIAS output hydrotables r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142401559 2016-12-07 19:24:10 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142401559 END BLOCK TWO r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142408331 2016-12-07 19:44:38 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142408331 Report Part 1 r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142411672 2016-12-07 19:55:37 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/142411672 GA sketch r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145461481 Room of improvement ]]> 2017-01-05 13:22:14 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145461481 Admiralty coefficient r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145463550  Can be improved]]> 2017-01-05 13:31:58 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145463550 Power estimation r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145464001 use HTS handleiding ]]> 2017-01-05 13:33:51 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145464001 Propulsion system r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145464635  ]]> 2017-01-05 13:36:23 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145464635 Priority r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145465192 2017-01-05 13:38:15 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145465192 Materials r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145466181 2017-01-05 13:41:16 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145466181 Welding r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145466587 2017-01-05 13:42:30 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145466587 Section Plan r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145467501 2017-01-05 13:45:07 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145467501 Slipway assembly r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145469204 2017-01-05 13:50:19 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145469204 POS list r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145470001 2017-01-05 13:53:07 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145470001 Shipyard Layout r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145470287 2017-01-05 13:54:00 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145470287 Work preparation and manufacturing r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145472596 2017-01-05 14:00:48 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145472596 Week 5 r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145473285 Similar or not? 
Due to short of data on vessel displacement, a delay is caused on finding a simlary vessel for seagoing tug to determine the requied power on the main engines. Suitable azipods thrusters are to be figured out.   ]]> 2017-01-05 14:03:01 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145473285 week 6 r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145474229 Production 
A lot of time is spend on reading materials on welding. 
GA sketch is in then end drawn by hand in order to define section plan though main power plant is not yet configured. 
Production manufaturing is decribed where yard layout and POSlist shall be referred to together. 
Midship section is refined according to new design. ]]> 2017-01-05 14:05:31 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145474229 Report Rev 2 r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145476194 under progress]]> 2017-01-05 14:10:53 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/145476194 Presentation r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/147420648 2017-01-16 21:35:41 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/147420648 Stern first Launching r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/151578379 That little girl in pink jacket is my sweat daughter Emily
https://www.youtube.com/watch?v=spVSv3VelOA]]> 2017-02-03 22:32:16 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/151578379 Vessel launching process r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/151578750 2017-02-03 22:36:03 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/151578750 Corrosion protection r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/151578972 2017-02-03 22:38:59 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/151578972 Gensets r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/151579938 2017-02-03 22:52:48 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/151579938 Week 7-10 r_li1 https://padlet.com/r_li1/l3f5v3lrdkzw/wish/151580236 2017-02-03 22:58:55 UTC https://padlet.com/r_li1/l3f5v3lrdkzw/wish/151580236