Calculate beam cross section properties for a multi layer pipe.
Unit mass can be calculated with or without added mass. Added mass is included in the unit mass for submerged beams to account for the fluid which is displaced by the beam. The added mass coefficient is calculated in accordance with DNVGL RP F105. EAα is required for beams with axial load. The bending stifness can be calculated with the concrete stiffness factor (CSF). The CSF accounts for the additional stiffness provided by the external concrete coating.
Enter the wall thickness for all layers. Only enter the elastic modulus for layers which will contribute to either ExA or EI. ExA and EAα are calculated for the inside layers only. Use the Result Table option to display the cross section properties versus wall thickness. Refer to the help pages for more details.
Reference : DNVGL RP F105 Free Spanning Pipelines (Download From DNVGL website)
Tool Input
- schdtype : Line Pipe Schedule Type
- diamtype : Line Pipe Diameter Type
- ODu : User Defined Outside Diameter
- IDu : User Defined Inside Diameter
- wtntype : Line Pipe Wall Thickness Type
- tnu : User Defined Wall Thickness
- eitype : Axial Stiffness Modulus Type
- Kcu : User Defined Coating Factor
- CSFu : User Defined Concrete Stiffness Factor
- zstype : Pipe Section Modulus Type
- mmtype : Mass Type
- ρe : User Defined External Fluid Density
- Cmu : User Defined Added Mass Coefficient
- G : Gap Height
- mltype : Mass Type
- WTi : Pipe Liner Wall Thickness
- ρi : Pipe And Liner Density
- Ei : Pipe And Liner Elastic Modulus
- αi : Pipe And Liner Thermal Expansion Coefficient
- νi : Pipe And Liner Poisson's Ratio
- WTo : Pipe Coating Wall Thickness
- ρo : Pipe Coating Density
- Eo : Pipe Coating Elastic Modulus
- L : Length
- ρf : Internal Fluid Density
Tool Output
- ν : Effective Poisson Ratio
- CSF : Concrete Stiffness factor
- Cm : Added Mass Coefficient
- EA : Axial Stiffness Modulus (E x A)
- EAα : Thermal Expansion Modulus (E x A x alpha)
- EI : Effective Axial Stiffness Modulus (E x I)
- EIc : Concrete E x I
- EIp : Pipe E x I
- I : Pipe Moment Of Inertia
- IID : Pipe Inside Diameter Including Liners
- Ip : Pipe Polar Moment Of Inertia
- J : Pipe Mass Moment Of Inertia
- Kc : Coating Factor
- L/r : Slenderness Ratio
- M : Total Mass
- Mc : Contents Mass
- Mp : Pipe Mass Including Layers
- OD : Line Pipe Diameter
- OOD : Pipe Outer Diameter Including Coatings
- SG : Pipe Specific Gravity (Including Contents)
- Zs : Pipe Section Modulus
- m : Mass Per Unit Length (Including Contents)
- md : Displaced Fluid Unit Mass
- mla : Added Unit Mass
- mlc : Contents Unit Mass
- mlp : Pipe Unit Mass Including Liner And Coating
- r : Radius Of Gyration
- tn : Line Pipe Thickness
- w : Weight Per Unit Length (Including Contents And Buoyancy)