Model
Model is the class that describes the whole piping/structure geometry and loadings.
Extension *.metaL on disk. JSON format.
# Python script
from Cwantic.MetaPiping.Core import Model
metal = Model()
1. Properties
| Name | Type | Description |
|---|---|---|
| Plant | string | Plant |
| Engineer | string | Engineer |
| Title | string | Title |
| Units | Units | System units |
| ZVertical | bool | True if Z vertical, otherwise Y vertical |
| CalculationCode | CalculationCode | Piping or Structure code |
| DefaultRoomTemperature | float | Default room temperature |
| DefaultOperatingDensity | float | Default operating density |
| DefaultTestDensity | float | Default test density |
| DefaultDesignCondition | OperatingCondition | Default design condition |
| ColdModulus | bool | True if cold modulus is used for all cases |
| HotAllowable | bool | True if allowable stress at operating temperature is used, otherwise design temperature is used |
| PressureStiffening | bool | True if pressure correction for bends |
| PressureElongation | bool | True if pressure elongation is considered for thermal expansion and test cases |
| SimplePressureStress | bool | True if simplified formula is used for pressure stress |
| ModalAnalysis | bool | True if modal extraction is performed |
| ModalRefCase | StaticCase | Young modulus is evaluated at the temperature of the reference case (Hot modulus option only) |
| CutOffFrequency | float | Cut-off frequency for modal extraction |
| MassGenerationFrequency | float | Frequency for automatic mass point generation |
| NbMaxModes | int | Maximum number of extracted mode shapes |
| MassModeling | int | |
| BranchModeling | TeeModeling | |
| BranchForcesAtSurface | bool | |
| ThermalCyclesPerElement | bool | |
| TrueTransientRange | bool | |
| AlternativeKe | bool | |
| Average3Sm | bool | |
| OptimizedResidualMoments | bool | |
| OutputFatigueAtAllPoints | bool | |
| OutputEq12And13Always | bool | |
| ExtrapolateFatigueCurves | bool | |
| ExtrapolateCreepCurves | bool | |
| RB3661_15 | bool | |
| ReducerModulus | ReducerModulus | |
| RB3662_24 | bool | |
| RB3662_Relaxation | bool | |
| SteelToConcreteRatio | float | |
| ConsistentMasses | bool |
REM : a model must have one calculation code of type PipingCode or StructureCode.
Click here for more information about Units, OperatingCondition, TeeModeling and ReducerModulus
Click here for more information about CalculationCode
The class Model also provides lists of the objects contained in the piping/structure model:
| Name | Description |
|---|---|
| Nodes | List of Node |
| Elements | List of Element |
| LumpedMasses | List of LumpedMass |
| Restraints | List of Restraint |
| Materials | List of Material |
| Sections | List of Section |
| DLCSs | List of DLCS (Defined Local Coordinate System) |
| Tees | Dictionary<Node, Tee>, for piping only |
| UserSIFs | List of UserSIF (User-defined SIF), for piping only |
| RestrainedNodes | List of restrained nodes |
| Layers | List of Layer |
| Specifications | List of the specification names (string), for piping only |
| Joints | List of Joint, for structure only |
| PipingCodes | List of PipingCode, for piping only |
| DesignConditions | List of OperatingCondition, for piping only |
| Soils | List of Soil, for piping only |
| Links | List of NodeLink, for structure only |
| ModalSets | List of ModalSet |
REM : a piping model can have multiple PipingCode for different lines but only one calculation code at a time.
Click here for more information about Node
Click here for more information about Element and Tee
Click here for more information about Restraint
Click here for more information about Material
Click here for more information about Section
Click here for more information about ModalSet
The class Model also provides lists of load cases :
| Name | Description |
|---|---|
| StaticCases | List of StaticCase |
| THFCases | List of THFCase |
| RPrimCases | List of RPrimCase |
| RSecCases | List of RSecCase |
| CombiCases | List of CombiCase |
| StressCases | List of StressCase |
| RSpectra | List of RSpectrum |
| ThermalCases | List of ThermalCase |
| LoadSets | List of LoadSet |
| ExternalCases | List of ExternalCase |
| THFEvents | List of THFEvent |
Click here for more information about all Loadcase types
The class Model also provides constants values (in MKS units) for restraint’s default stiffness :
| Name | Value | Description |
|---|---|---|
| ANCH_TSTIFF | 1.75e13 | |
| ANCH_RSTIFF | 1.13e12 | |
| ROTR_STIFF | 1.13e12 | |
| RSTN_STIFF | 8.75e8 | |
| SNUB_STIFF | 2.625e8 | |
| VSUP_STIFF | 8.75e8 | |
| VSUP_KPIN | 1.75e13 | |
| SPRS_TSTIFF | 17.513 | |
| SPRS_RSTIFF | 0.136 | |
| SPRF_TFLEX | 5.71e-14 | |
| SPRF_RFLEX | 8.851e-13 |
Example of piping model (without loadings) :
JSON *.metaL :
{
"Version": 1,
"JobNumber": 1,
"ZVertical": true,
"InputUnits": 0,
"OutputUnits": 0,
"DefaultRoomTemperature": 21.11,
"DefaultOperatingDensity": 0.0,
"DefaultTestDensity": 0.0,
"ColdModulus": true,
"HotAllowable": false,
"PressureStiffening": false,
"PressureElongation": false,
"SimplePressureStress": false,
"MassModeling": 3,
"BranchModeling": 0,
"BendMeshAngle": 15.0,
"DefaultDesignCondition": {
"Line": 15,
"T": 21.11
},
"DesignConditions": [],
"CalculationCode": {
"Code": "8",
"Edition": 11,
"Target": 0
},
"PipingCodes": [],
"Layers": [
{
"Name": "0"
}
],
"Soils": [],
"Nodes": [
{
"Line": 16,
"Name": "10",
"Coor": "0,0,0",
"IsCoorInput": true,
"JointType": 2
},
{
"Name": "20",
"Coor": "0.8476,0,0",
"JointType": 2
},
{
"Name": "20-30",
"Coor": "1,0,0"
},
{
"Name": "30",
"Coor": "1,0,0.1524",
"JointType": 2
},
{
"Name": "40",
"Coor": "1,0,0.5",
"JointType": 2
},
{
"Line": 22,
"Name": "60",
"Coor": "1,0,0.65"
},
{
"Name": "70",
"Coor": "1,0.1,0.65"
},
{
"Name": "50",
"Coor": "1,0,0.8",
"JointType": 2
},
{
"Name": "80",
"Coor": "1,0,1",
"JointType": 2
},
{
"Name": "90",
"Coor": "1,0,1.1016",
"JointType": 2
},
{
"Name": "100",
"Coor": "1,0,1.5",
"JointType": 2
}
],
"Sections": [
{
"Line": 13,
"Section": "PipeSection",
"Name": "1",
"LinearMass": 16.1,
"Description": "4\" Sch 40-Std-40S",
"Diameter": 0.1143,
"Thickness": 0.0060199999999999993
},
{
"Line": 14,
"Section": "PipeSection",
"Name": "2",
"LinearMass": 5.44,
"Description": "2\" Sch 40-Std-40S",
"Diameter": 0.06032,
"Thickness": 0.00391
}
],
"Materials": [
{
"Line": 2,
"Material": "RegularMaterial",
"Name": "100",
"Type": 1,
"Target": 0,
"ThermalExpansionOption": 2,
"RefTemperature": 21.1,
"Density": 7850.0,
"Poisson": 0.3,
"MaxTemperature": 371.0,
"Description": "SA-106 A",
"Properties": [
{
"TE": 21.0,
"EH": 202700000000.0,
"EX": 1.152E-05,
"SH": 94500000.0,
"SY": 206900000.0,
"SU": 0.0,
"SM": 110300000.0,
"CR": 0.0,
"GH": 0.0,
"E2": 0.0,
"CO": 0.0,
"DI": 0.0
},
{
"TE": 65.0,
"EH": 200000000000.0,
"EX": 1.188E-05,
"SH": 94500000.0,
"SY": 194400000.0,
"SU": 0.0,
"SM": 110300000.0,
"CR": 0.0,
"GH": 0.0,
"E2": 0.0,
"CO": 0.0,
"DI": 0.0
},
{
"TE": 93.0,
"EH": 198600000000.0,
"EX": 1.206E-05,
"SH": 94500000.0,
"SY": 189600000.0,
"SU": 0.0,
"SM": 110300000.0,
"CR": 0.0,
"GH": 0.0,
"E2": 0.0,
"CO": 0.0,
"DI": 0.0
},
{
"TE": 149.0,
"EH": 195100000000.0,
"EX": 1.242E-05,
"SH": 94500000.0,
"SY": 182700000.0,
"SU": 0.0,
"SM": 110300000.0,
"CR": 0.0,
"GH": 0.0,
"E2": 0.0,
"CO": 0.0,
"DI": 0.0
},
{
"TE": 204.0,
"EH": 192400000000.0,
"EX": 1.278E-05,
"SH": 94500000.0,
"SY": 176500000.0,
"SU": 0.0,
"SM": 110300000.0,
"CR": 0.0,
"GH": 0.0,
"E2": 0.0,
"CO": 0.0,
"DI": 0.0
},
{
"TE": 260.0,
"EH": 188200000000.0,
"EX": 1.314E-05,
"SH": 94500000.0,
"SY": 168200000.0,
"SU": 0.0,
"SM": 110300000.0,
"CR": 0.0,
"GH": 0.0,
"E2": 0.0,
"CO": 0.0,
"DI": 0.0
},
{
"TE": 316.0,
"EH": 182700000000.0,
"EX": 1.332E-05,
"SH": 94500000.0,
"SY": 158600000.0,
"SU": 0.0,
"SM": 105500000.0,
"CR": 0.0,
"GH": 0.0,
"E2": 0.0,
"CO": 0.0,
"DI": 0.0
},
{
"TE": 343.0,
"EH": 179300000000.0,
"EX": 1.35E-05,
"SH": 94500000.0,
"SY": 153100000.0,
"SU": 0.0,
"SM": 100700000.0,
"CR": 0.0,
"GH": 0.0,
"E2": 0.0,
"CO": 0.0,
"DI": 0.0
},
{
"TE": 371.0,
"EH": 175800000000.0,
"EX": 1.368E-05,
"SH": 86200000.0,
"SY": 148200000.0,
"SU": 0.0,
"SM": 99300000.0,
"CR": 0.0,
"GH": 0.0,
"E2": 0.0,
"CO": 0.0,
"DI": 0.0
}
]
}
],
"Elements": [
{
"Line": 19,
"Element": "Pipe",
"Node1": 0,
"Node2": 1,
"DL": "0.8476,0,0",
"Material": 0,
"Layer": 0,
"Section": 0
},
{
"Line": 20,
"Element": "Bend",
"Node1": 1,
"Node2": 3,
"DL": "0.1524,0,0.1524",
"Material": 0,
"Layer": 0,
"Section": 0,
"DL1": "0.1524,0,0",
"DL2": "0,0,0.1524",
"Node3": 2,
"Radius": 0.1524,
"Angle": 1.570796326794897
},
{
"Line": 21,
"Element": "Pipe",
"Node1": 3,
"Node2": 4,
"DL": "0,0,0.3476",
"Material": 0,
"Layer": 0,
"Section": 0
},
{
"Line": 22,
"Element": "Valve",
"Node1": 4,
"Node2": 7,
"DL": "0,0,0.3",
"Material": 0,
"Label": "Valve1",
"Layer": 0,
"Mass": 100.0,
"Section": 0,
"ThicknessFactor": 3.0,
"Type": 0,
"PB": 5,
"PC": 6,
"BL": "0,0.1,0",
"IsStemEmpty": true
},
{
"Line": 23,
"Element": "Pipe",
"Node1": 7,
"Node2": 8,
"DL": "0,0,0.2",
"Material": 0,
"Layer": 0,
"Section": 0
},
{
"Line": 24,
"Element": "Reducer",
"Node1": 8,
"Node2": 9,
"DL": "0,0,0.1016",
"Material": 0,
"Layer": 0,
"Section": 0,
"Section2": 1
},
{
"Line": 26,
"Element": "Pipe",
"Node1": 9,
"Node2": 10,
"DL": "0,0,0.3984",
"Material": 0,
"Layer": 0,
"Section": 1
}
],
"Restraints": [
{
"Line": 17,
"Restraint": "Anchor",
"Node": 0,
"AttachedElement": 0,
"Label": "Anchor1",
"Layer": 0
}
],
"LumpedMasses": [],
"Tees": [],
"DLCSs": [],
"UserSIFs": [],
"Specifications": [],
"Links": [],
"StaticCases": [],
"THFEvents": [],
"THFCases": [],
"RSpectra": [],
"RPrimCases": [],
"RSecCases": [],
"CombiCases": [],
"StressCases": [],
"ThermalCases": [],
"LoadSets": [],
"ExternalCases": []
}