## On this page

  

 

 # Class CrossSectionBase

 Last update: 16.07.2025 

Namespace: [VM.Managed.DAFUL.Beam](VM.Managed.DAFUL.Beam.md)  
Assembly: VM.Models.FE.BeamCrossSection.dll

```csharp
public class CrossSectionBase

```

#### Inheritance

[object](https://learn.microsoft.com/dotnet/api/system.object) ← [CrossSectionBase](VM.Managed.DAFUL.Beam.CrossSectionBase.md)

#### Derived

[CIRCULAR](VM.Managed.DAFUL.Beam.CIRCULAR.md), [ELLIPTICAL](VM.Managed.DAFUL.Beam.ELLIPTICAL.md), [HOLLOW\_RECTANGULAR](VM.Managed.DAFUL.Beam.HOLLOW_RECTANGULAR.md), [HOLLOW\_TAPERED\_CIRCULAR](VM.Managed.DAFUL.Beam.HOLLOW_TAPERED_CIRCULAR.md), [I\_BEAM](VM.Managed.DAFUL.Beam.I_BEAM.md), [RECTANGULAR](VM.Managed.DAFUL.Beam.RECTANGULAR.md), [THIN\_TUBE](VM.Managed.DAFUL.Beam.THIN_TUBE.md), [T\_BEAM](VM.Managed.DAFUL.Beam.T_BEAM.md)

#### Extension Methods

[LinkPropertyItemCache.GetLinkProperties(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkProperties_System_Object_VM_Models_Pre_LinkPropertyType_), [LinkPropertyItemCache.GetLinkPropertiesAndValues(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkPropertiesAndValues_System_Object_VM_Models_Pre_LinkPropertyType_), [LinkPropertyItemCache.GetLinkedObjects<T>(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkedObjects__1_System_Object_VM_Models_Pre_LinkPropertyType_)

## Constructors

### CrossSectionBase()

```csharp
public CrossSectionBase()

```

## Fields

### m\_nGeomInfoArrayCount

```csharp
protected uint m_nGeomInfoArrayCount

```

#### Field Value

[uint](https://learn.microsoft.com/dotnet/api/system.uint32)

### m\_nNastranArrayCount

```csharp
protected uint m_nNastranArrayCount

```

#### Field Value

[uint](https://learn.microsoft.com/dotnet/api/system.uint32)

## Properties

### pi

```csharp
protected double pi { get; }

```

#### Property Value

[double](https://learn.microsoft.com/dotnet/api/system.double)

## Methods

### CheckDensity(double)

```csharp
protected void CheckDensity(double dDensity)

```

#### Parameters

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

### CheckGeomInfo(double\[\])

```csharp
public void CheckGeomInfo(double[] dSInfo)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### CheckInputCount(double\[\])

```csharp
protected void CheckInputCount(double[] dSInfo)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### CheckLength(double)

```csharp
protected void CheckLength(double dLength)

```

#### Parameters

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

### CheckMass(double)

```csharp
protected void CheckMass(double dMass)

```

#### Parameters

`dMass` [double](https://learn.microsoft.com/dotnet/api/system.double)

### GenerateMultiSection(double\[\], int)

```csharp
public virtual double[] GenerateMultiSection(double[] dSInfo, int ElementCount)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`ElementCount` [int](https://learn.microsoft.com/dotnet/api/system.int32)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### GenerateOneSection(double\[\])

```csharp
public virtual double[] GenerateOneSection(double[] dSInfo)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### GeneratePostConnectivities(int, ref int\[\], ref int\[\])

```csharp
public virtual int GeneratePostConnectivities(int RenderingType, ref int[] iENodes, ref int[] iStartENodes)

```

#### Parameters

`RenderingType` [int](https://learn.microsoft.com/dotnet/api/system.int32)

`iENodes` [int](https://learn.microsoft.com/dotnet/api/system.int32)\[\]

`iStartENodes` [int](https://learn.microsoft.com/dotnet/api/system.int32)\[\]

#### Returns

[int](https://learn.microsoft.com/dotnet/api/system.int32)

### GeneratePostOneSection(double\[\], int)

```csharp
public virtual double[] GeneratePostOneSection(double[] dSInfo, int RenderingType = 1)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`RenderingType` [int](https://learn.microsoft.com/dotnet/api/system.int32)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### GeneratePostTwoSection(double\[\], double\[\], double\[\], double\[\], double\[\], int)

```csharp
public virtual double[] GeneratePostTwoSection(double[] dSInfo, double[] dStartPoint, double[] dEndPoint, double[] dStartOri, double[] dEndOri, int RenderingType)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dStartPoint` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dEndPoint` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dStartOri` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dEndOri` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`RenderingType` [int](https://learn.microsoft.com/dotnet/api/system.int32)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### GenerateTwoSection(double\[\], double\[\], double\[\], double\[\])

```csharp
public double[,] GenerateTwoSection(double[] dSInfo, double[] dStartPoint, double[] dEndPoint, double[] dOrienMatrix)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dStartPoint` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dEndPoint` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dOrienMatrix` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[,\]

### GetArea(double\[\])

```csharp
public virtual double GetArea(double[] dSInfo)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetAreaProperties(double\[\], double)

```csharp
public virtual double[] GetAreaProperties(double[] dSInfo, double dPoissonRatio)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dPoissonRatio` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### GetAsy(double\[\], double)

```csharp
public virtual double GetAsy(double[] dSInfo, double dPoissonRatio)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dPoissonRatio` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetAsz(double\[\], double)

```csharp
public virtual double GetAsz(double[] dSInfo, double dPoissonRatio)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dPoissonRatio` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetIxx(double\[\])

```csharp
public virtual double GetIxx(double[] dSInfo)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetIyy(double\[\])

```csharp
public virtual double GetIyy(double[] dSInfo)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetIzz(double\[\])

```csharp
public virtual double GetIzz(double[] dSInfo)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetJxx(double, double, double)

```csharp
public double GetJxx(double dIxx, double dDensity, double dLength)

```

#### Parameters

`dIxx` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetJxx(double\[\], double, double)

```csharp
public double GetJxx(double[] dSInfo, double dDensity, double dLength)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetJyy(double, double\[\], double, double)

```csharp
public virtual double GetJyy(double dMass, double[] dSInfo, double dDensity, double dLength)

```

#### Parameters

`dMass` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetJyy(double\[\], double, double)

```csharp
public virtual double GetJyy(double[] dSInfo, double dDensity, double dLength)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetJzz(double, double\[\], double, double)

```csharp
public virtual double GetJzz(double dMass, double[] dSInfo, double dDensity, double dLength)

```

#### Parameters

`dMass` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetJzz(double\[\], double, double)

```csharp
public virtual double GetJzz(double[] dSInfo, double dDensity, double dLength)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetMass(double\[\], double, double)

```csharp
public double GetMass(double[] dSInfo, double dDensity, double dLength)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetMassMomentOfInertia(double, double, double\[\], double, double)

```csharp
public virtual double[] GetMassMomentOfInertia(double dMass, double dIxx, double[] dSInfo, double dDensity, double dLength)

```

#### Parameters

`dMass` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dIxx` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### GetMassProperties(double\[\], double, double)

```csharp
public virtual double[] GetMassProperties(double[] dSInfo, double dDensity, double dLength)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### GetNumSideEdges(int)

```csharp
public virtual int GetNumSideEdges(int RenderingType = 1)

```

#### Parameters

`RenderingType` [int](https://learn.microsoft.com/dotnet/api/system.int32)

#### Returns

[int](https://learn.microsoft.com/dotnet/api/system.int32)

### GetNumTotalElements(int)

```csharp
public virtual int GetNumTotalElements(int RenderingType = 1)

```

#### Parameters

`RenderingType` [int](https://learn.microsoft.com/dotnet/api/system.int32)

#### Returns

[int](https://learn.microsoft.com/dotnet/api/system.int32)

### GetNumTotalNodes(int)

```csharp
public virtual int GetNumTotalNodes(int RenderingType = 1)

```

#### Parameters

`RenderingType` [int](https://learn.microsoft.com/dotnet/api/system.int32)

#### Returns

[int](https://learn.microsoft.com/dotnet/api/system.int32)

### GetRequiredInputCount(CrossSectionType)

```csharp
public virtual uint GetRequiredInputCount(CrossSectionType sectionEnumType)

```

#### Parameters

`sectionEnumType` [CrossSectionType](VM.Managed.DAFUL.Beam.CrossSectionType.md)

#### Returns

[uint](https://learn.microsoft.com/dotnet/api/system.uint32)

### GetSphereBodyRadius(double\[\])

```csharp
public virtual double GetSphereBodyRadius(double[] dSInfo)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### GetStiffnessElementsOfMatrixForceByCoef(double, double, double, double, double, double, double, double, double, double, double)

```csharp
public double[] GetStiffnessElementsOfMatrixForceByCoef(double dArea, double dIyy, double dIzz, double dIxx, double dAsy, double dAsz, double dLength, double dPoissonRatio, double dDensity, double dYoungsModulus, double dShearModulus)

```

#### Parameters

`dArea` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dIyy` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dIzz` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dIxx` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dAsy` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dAsz` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dPoissonRatio` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dYoungsModulus` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dShearModulus` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### GetStiffnessElementsOfMatrixForceByGeom(double\[\], double, double, double, double, double)

```csharp
public double[] GetStiffnessElementsOfMatrixForceByGeom(double[] dSInfo, double dLength, double dPoissonRatio, double dDensity, double dYoungsModulus, double dShearModulus)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`dLength` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dPoissonRatio` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dDensity` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dYoungsModulus` [double](https://learn.microsoft.com/dotnet/api/system.double)

`dShearModulus` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### SetVariablesFromArray2Local(double\[\])

```csharp
protected virtual void SetVariablesFromArray2Local(double[] dSInfo)

```

#### Parameters

`dSInfo` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### TranslateNastran2DAFUL(double\[\])

```csharp
public virtual double[] TranslateNastran2DAFUL(double[] dNastran)

```

#### Parameters

`dNastran` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### cos(double)

```csharp
protected double cos(double a)

```

#### Parameters

`a` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)

### mattrvec(double\[\], double\[\])

```csharp
protected double[] mattrvec(double[] a, double[] b)

```

#### Parameters

`a` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`b` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### matvec(double\[\], double\[\])

```csharp
protected double[] matvec(double[] a, double[] b)

```

#### Parameters

`a` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

`b` [double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)\[\]

### sin(double)

```csharp
protected double sin(double a)

```

#### Parameters

`a` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[double](https://learn.microsoft.com/dotnet/api/system.double)