genericpartmodule Module Reference

Functions/Subroutines
subroutine, public	readgenericpart (infp, sup, ierr)
	Reads generic part properties from the solver input file. More...
subroutine	estimaterigidstiffness (sup, mass, inertia, kt, kr)
	Calculates semi-rigid stiffness coefficients for a generic part. More...
subroutine	assemblestiffness (sup, K, kt, kr, stiffness)
	Assembles the stiffness matrix for a generic part. More...
subroutine	assemblemass (M, mass, inertia)
	Assembles the mass matrix for a generic part. More...
subroutine, public	initiategenericparts (sups)
	Initializes more generic part data after system initialization. More...

Function/Subroutine Documentation

assemblemass()

subroutine genericpartmodule::assemblemass	(	real(dp), dimension(:,:), intent(out)	M,
		real(dp), intent(in)	mass,
		real(dp), dimension(:), intent(in)	inertia
	)

Assembles the mass matrix for a generic part.

Parameters

[out]	M	Assembled superelement mass matrix
[in]	mass	Total mass of the superelement
[in]	inertia	Total inertia of the superelement

Assuming that all mass is coupled to the first triad (the CoG).

Author

Knut Morten Okstad

Date

21 Jan 2004

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assemblestiffness()

subroutine genericpartmodule::assemblestiffness	(	type(supeltype), intent(in)	sup,
		real(dp), dimension(:,:), intent(out)	K,
		real(dp), intent(in)	kt,
		real(dp), intent(in)	kr,
		real(dp), dimension(:,:), intent(in)	stiffness
	)

Assembles the stiffness matrix for a generic part.

Parameters

[in]	sup	The superelement object representing the generic part
[out]	K	Assembled superelement stiffness matrix
[in]	kt	Translational stiffness coefficient
[in]	kr	Rotational stiffness coefficient
[in]	stiffness	Individual nodal stiffness coefficients

The part of the stiffness matrix associated with the CoG and one of the other triads of the generic part is assumed to be:

[k] = |  kt           -kt*spin(e)               -kt           0  |
      |         kr + spin(e)'*kt*spin(e)   spin(e)'*kt      -kr  |
      |                                          kt           0  |
      |  symm.                                               kr  |

where kt and kr are diagonal 3x3 stiffness matrices for translational and rotational DOFs, respectively, and e is the eccentricity vector giving the relative position of the hard-point with respect to the CoG.

Author

Knut Morten Okstad

Date

21 Jan 2004

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estimaterigidstiffness()

subroutine genericpartmodule::estimaterigidstiffness	(	type(supeltype), intent(in)	sup,
		real(dp), intent(in)	mass,
		real(dp), dimension(:), intent(in)	inertia,
		real(dp), intent(out)	kt,
		real(dp), intent(out)	kr
	)

Calculates semi-rigid stiffness coefficients for a generic part.

Parameters

[in]	sup	The superelement object representing the generic part
[in]	mass	Total mass of the superelement
[in]	inertia	Total inertial of the superelement
[out]	kt	Translational stiffness coefficient
[out]	kr	Rotational stiffness coefficient

This subroutine estimates the stiffness coefficients to be assigned at each triad of the superelement, such that it behaves like completely rigid. The estimate is based on the given mass and a user-specified target eigenfrequency.

Author

Knut Morten Okstad

Date

28 Oct 2004

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initiategenericparts()

subroutine, public genericpartmodule::initiategenericparts

(

type(supeltype), dimension(:), intent(inout)

sups

)

Initializes more generic part data after system initialization.

Parameters

sups	Array of all superelements in the model

Author

Knut Morten Okstad

Date

28 Aug 2013

readgenericpart()

subroutine, public genericpartmodule::readgenericpart	(	integer, intent(in)	infp,
		type(supeltype), intent(inout)	sup,
		integer, intent(out)	ierr
	)

Reads generic part properties from the solver input file.

Parameters

[in]	infp	File unit number for the solver input file
	sup	The superelement object which is a generic part
[out]	ierr	Error flag

This subroutine reads stiffness and mass properties for a generic part and generate the equivalent superelement matrices. Optionally, the center of gravity (CoG) triad is condensed condense out.

Author

Knut Morten Okstad

Date

16 Jan 2004

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