構造解析プログラム v-struct3.0†研シンポジウム － vcadシステム研究2007...

理研シンポジウム理研シンポジウム － VCADシステム研究２００７〒３５１－０１９８ 埼玉県和光市広沢２－１ http://vcad-hpsv.riken.jp/

構造解析プログラム V-Struct3.0.5Structural Analysis Program V-Struct3.0.5

加工成形シミュレーションチームZhigang Sun zgsun@riken.jp

Naghi Esmaeili esmaeili@riken.jpCristain Teodosiu teodosiu@riken.jp

V-Struct 3.0.5 is a new version of the structural analysis program on VCAD system-V-Struct, which was newly released on June 29, 2007. This new version made it possible to utilize the own pre-post processor of V-Struct for setting BC and visualizing analysis result.

VV--StructStruct 3.0.5 is a new version of the structural analysis program on VC3.0.5 is a new version of the structural analysis program on VCAD systemAD system--VV--StructStruct, , which was newly released on June 29, 2007. This new version which was newly released on June 29, 2007. This new version made it possible to utilize the made it possible to utilize the own preown pre--post processor of Vpost processor of V--StructStruct for setting BC and visualizing analysis result.for setting BC and visualizing analysis result.

Specification of V-Struct 3.0.5 FEM formulation

Procedure of structural analysis using V-Struct 3.0.5 on VCAD system

Example of structural analysis using V-Struct 3.0.5

Analysis function Static linear elastic analysis corresponding to largedisplacement and large rotation deformations.

Analysis method Static-explicit FEMUpdated Lagrange formulation

Available FE model DHE modelMixed-type-FE model

Operating system Windows

Language Compaq Visual Fortran

Compiler Compag Visual Fortran 6.6 for Windows

∫ ∫∫

∫ ∫∫

+=∂

+=∂∂

t

t

S v iiiiijV ji

S v iiii

j

i

V ji

dVvbdSvtdVL

dVvbdSvtdVxv

δρδΠ

δρδδ

Π_.

_.

_.

_.

．

．

)21

2( kljiikjliljkjikl

kljiklji

GC

DC

δδν

νδδδδ

τ

−++=

＝。

)(21

)(

jlikiljkjkilikjljikl

kljikljilk

kljilkji

ikjkkijkkijkjiji

S

LSCLS

LDD

δσδσδσδσ

τσσστΠ

−−−=

+=+=

+−−= o

o．

∫ ∫∫ +=∂+tS v iiiiijkljiklV jikl dVvbdSvtdVLLSC δρδ

_.

_.

)(

.

FKU =

Principle of virtual work in rate form:

Constitutive equation:

Transfer of stress rate:

Alternative form of the principle of virtual work:

Stiffness equation for whole body:

V: domain of deformation body

at current configuration

St: boundary of the domain on which

traction is prescribed

v: velocity of a particle within V

tractionofratet :_.

massunitperforcebodyofrateb :_.

density:ρ

tresssominalnofrate:.

Π

tresssKirchhoffofrateJaumann:o

τ

stressCauchy:σ

G: shear modulus of elasticity

v: Piosson ratio

L: velocity gradient

D: symmetric part of L

W: antisymmetric part of L

K: stiffness matrix

U: vector of nodal velocity

forcenodalofrateofvector:.

F

Generate .vcar model Generate .dhe model

Set boundary conditions

...

Generate Mixed-type-FE modelusing Mesh_converter

Generate DHE model and set BCusing V-Struct-Pre

Perform structural analysis using V-Struct3.0.5

Visualize analysis result using V-Struct-Post

*.iges

*.brep

*.unv *_MIX.unv

*[n].unv

*_MIX[n].unv

DHE model

Mixed-type-FE model

Mesh_converter V-Struct 3.0.5 V-Struct-Post

Module for generating *.vobj modelModule for generating *.vobj model

Module for generating *.vcar modelModule for generating *.vcar model

Module for handling *.vcar modelModule for handling *.vcar model

Module for generating *.dhe modelModule for generating *.dhe model

Module for setting BCModule for setting BC

V-Struct-Pre