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TABLE OF CONTENTS 1. INTRODUCTION 6 2. BARGE PARTICULARS & DIMENSIONS 8 3. SCANTLING CALCULATIONS 9 4. SCANTLING OF BARGE 13 5. DESIGN OF BARGE 15 6. CONCLUSION 16 1.INTRODUCTION A barge is a shoal-draft flat-bottomed boat,[built mainly for river and canal transport of bulk goods. Originally barges were towed by draft horses on an adjacent towpath. Today, barges may be self-propelled, usually with a slow-revving diesel engine and a large-diameter fixed-pitch propeller. Otherwise, "dumb barges" must be towed by tugs, or pushed by pusher boats. Compared to a towed barge, a pusher system has improved handling and is more efficient, as the pushing tug becomes "part of the unit" and it contributes to the momentum of the whole. A barge is a typically non-self-propelled, flat-bottomed vessel used initially for river or canal transportation of heavy goods. Although other means of transportation have been developed since their introduction, barges are still used all over the world as a low-cost solution for carrying either low-value or heavy and bulky items. Although a barge is very simplistic compared to most of its waterborne brethren, it still presents ample opportunity to experiment with balanced designs. A customer may desire to carry as much payload as possible to gain efficiencies in their transportation costs, but maximizing these payloads must be balanced by engineers to operate within the laws of physics (including stability, buoyancy, powering, resistance, structures, etc.) and balanced by financiers to operate within a customer’s allowable limits of cost. These two very obvious considerations alone can create quite a complex balancing act, since these forces - requirements, feasibility, and cost - tend to oppose each other. Barge view DESIGN AND CALCULATION OF BARGE USING MS excel 2. BARGE particulars and dimension PARTICULARS SYMBOL UNITS VAL UE LENGTH OVERALL L.O.A m 80 LENGTH BETWEEN PERPENDICULAR L.B.P m 80 LENGTH WATER LINE L.W.L m 80 RULE LENGTH L2 m 77.6 BREADTH B m 30 DEPTH D m 6 DRAFT T m 4.5 3. Scantling calculation of barge- Plating: - Minimum thickness requirements The net thickness of plating, in mm, shall comply with the minimum thickness requirement Element Location a b Keel 5.0 0.05 Bottom and bilge 4.5 0.035 Side shell From upper end of bilge plating to TSC + 4.6m 0.035 Shell From TSC + 4.6m to TSC + 6.9m 4.0 0.025 Elsewhere 0.01 Sea chest boundaries 4.5 0.05 Weather deck1),2),3),4), strength deck2),3) and platform deck in machinery space 0.02 Boundary for cargo tanks, water ballast tanks and hold intended for cargo in bulk 0.015 Deck 4.5 Other decks3),4),5) 0.01 Cargo spaces loaded through cargo hatches except container holds 5.5 0.025 Inner bottom Other spaces 4.5 0.02 Bulkheads for cargo tanks, water ballast tanks and hold intended for cargo in bulk 0.015 Peak bulkheads and machinery space end bulkheads 4.5 Bulkheads Watertight bulkheads and other tanks bulkheads 0.01 Non-tight bulkheads in tanks 0.005 5.0 Other non-tight bulkheads 0 Element a b given by: MINIMUM THICKNESS THE NET THICKNESS OF THE PLATE t =a+b*L2√k SPACING (550+2*LBP) = 710mm =0.9m k = 0.66 S.NO ELEMENT LOCATION a b t corrosion Corrected thickness thickness 1 shell 1.keel 5 0.05 8.15 0.41 8.559 2.bottom and bilge 4.5 0.03 6.71 0.34 7.04 5 3. side shell and superstructure side 4 0.03 9.1 0.46 9.555 Tsc + 4.6m 5 4.sea chest boundaries 4.5 0.05 4.68 0.23 4.916 2 Deck 1.weather deck and strength deck 4.5 0.02 6.86 0.34 7.207 2.boundary for cargo tank, water ballast 4.5 0.01 5.66 0.28 5.947 tank intended for cargo in bulk 5 3.other deck 4.5 0.01 5.26 0.26 5.539 3 Inner 1.cargo space loading tougher cargo 5.5 0.02 7.44 0.37 7.812 bottom hatches except container holds 5 2.other space 4.5 0.02 6.05 0.30 6.3546 4 Bulkhead 1.bulkheads for cargo tank ,water ballast 4.5 0.01 5.66 0.28 5.947 s tank and hold intended for cargo in bulk 5 2.peak bulkheads 4.5 0.01 4.95 0.25 5.197 5 3.watertight bulkheads and other tank 4.5 1.01 34.8 1.74 36.54 bulkheads 4.Non-tight bulkheads in tank 4.5 0.00 5.39 0.27 5.657 5 5.other non-tight bulkheads 5 0 5 0.25 5.252 - Stiffeners and tripping brackets - Minimum thickness requirements The net thickness of the web and face plate, if any, of stiffeners and tripping brackets in mm, shall comply with the minimum net thickness. In addition, the net thickness of the web of stiffeners and tripping brackets, in mm, shall be Element Location Net thickness Tank boundary 3.0 + 0.015 L2 Structures in deckhouse and superstructure and decks for Stiffeners and attached end brackets vessels with more than 2 continuous decks above 0.7 D from baseline 4.0 Other structure 3.5 + 0.010 L2 Tripping brackets 3.0 + 0.015 L2 — not less than 40% of the net required thickness of the attached plating, to be determined . Minimum net thickness for stiffeners and tripping brackets s.no MINIMUM location value THICKNESS 1 stiffeners Tank boundary 5.276 and attached end brackets Structure in deckhouse and superstructure and deck for vessels with 4 more than 2 continuous deck above 0.7D from baseline 3.other deck 4.888 2 tripping 5.276 brackets - Primary supporting members - Minimum thickness requirements The net thickness of web plating and flange of primary supporting members in mm, shall comply with the appropriate minimum thickness requirements given by: Minimum net thickness for primary supporting members Element a b Bottom centerline girder and lower strake of centerline wash bulkhead 5.0 0.03 Other bottom girders 5.0 0.017 Floors 5.0 0.015 1) Floors in peak tanks 5.0 0.025 PSM supporting side shell, ballast tank, cargo tank and hold intended for cargo in bulk2),3), 4.5 0.015 Other PSM 4.5 0.01 1) The value of bL2 does not need to be greater than 5.0. 2) For stringers in double side next to dry space not intended for cargo in bulk, the value of bL2 does not need to be taken greater than 2.5. 3) Other specific requirements related to ship types are given in Pt.5. s.no ELEMENT a b t corrosion Corrected thickness thickness 1 Bottom centreline girder and lower strake of 5 0.03 6.89 0.34 7.235 centreline wash bulkhead 2 Other bottom girders 5 0.017 6.07 0.30 6.375 3 Floors 5 0.015 5.95 0.30 6.242 4 Floors in peak tanks 4.5 0.01 5.13 0.26 5.386 5 PSM supporting side shell, ballast tank, cargo tank 4.5 0.01 5.13 0.26 5.386 and hold intended for cargo in bulk2),3), 6 Other PSM 5 0.025 6.58 0.33 6.904 4. Scantling of barge BILGE PLATE CALCULATIONS RADIUS {r} 1.1 (m) AREA (A) pi*r*h/2 0.015077 ( m^2) Lever abt keel (y) r-(2r/pi) 0.387382 (m) 2 nd MOM (I own) pi*r^3*h/4 0.001619 (m^4) Calculation has to be done: 1) Unit area = breadth * height 2) Total area = quantity of the material *(breadth*height) 3) Lever = height/2 4) 1st moment = total area * lever 5) 2nd moment = 1st moment * lever 6) Moment of inertia = (b*h)^3/12 7) Total moment of inertia = moment of inertia * quantity of the material 8) Ykeel = ∑ total area/∑ 1st moment 9) Ydeck = draft - Ykeel nd 10) Itotal = 2 moment +total moment 11) INA = Itotal – total area*(Ykeel)^2 12) Zkeel = INA/ Ykeel 5. Design of barge 6.Conclusion and recommendation This section summarizes the most significant conclusions of the design of barge and gives recommendations for further practical and experimental work. Conclusions regarding specific design/analysis. Design/ analysis procedures for low-pressure, tanks for service on rivers are well established. A survey of designers, regulatory bodies, builders, surveyors, and operators. In view of the excellent operating history and record of river tank barges, the design procedures for river barge tanks of up to 20 feet in diameter for river barge application are considered adequate. In many cases operators specify structural strength in excess of regulatory body requirements. Design procedures for river barges are generally applicable for determining the basic configuration larger tanks contemplated for ocean service. This conclusion is based on the good agreement between stability and momentum calculated by the established procedure and a more sophisticated computer analysis. 1 | P a g e 2 | P a g e 3 | P a g e 4 | P a g e CONTENTS S.NO TOPIC PG.NO 1.0 INTRODUCTION 6 2.0 MIDSHIP SECTION DRAWING 6 3.0 GENERAL ARRANGEMENT 7 PLAN 4.0 SCANTLING 10 5.0 EQUIPMENT NUMBER 12 6.0 CAPACITY CALCULATION 14 5 | P a g e 1.0 INTRODUCTION Report includes the structural design of a Tuna longliner of 120 CuM fish hold capacity.