介绍

通过findAt函数，可以选择cell（体）、face（面）、edge（边）和vertex（顶点）。

传入点或者点序列的坐标数据，返回通过该点坐标位置的点、线、面、体对象或者对象序列。

帮助文档
findAt(): This method returns the object or objects in the VertexArray located at the given coordinates.
findAt initially uses the ACIS tolerance of 1E-6. As a result, findAt returns any Vertex object that is at the arbitrary point specified or at a distance of less than 1E-6 from the arbitrary point. If nothing is found, findAt uses the tolerance for imprecise geometry (applicable only for imprecise geometric entities).
findAt will always try to find objects among all the vertices in the part or assembly instance and will not restrict itself to a subset even if the VertexArray represents such subset.
Required argument:coordinates A sequence of Floats specifying the X-, Y-, and Z-coordinates of the object to find.
findAt returns either a Vertex object or a sequence of Vertex objects based on the type of input.
If coordinates is a sequence of Floats, findAt returns the Vertex object at that point.If you omit the coordinates keyword argument, findAt accepts as arguments a sequence of sequence of floats in the following format:

# 一定要注意findAt后面" ( "和" , "的位置
verts = v.findAt(((20.19686, -169.513997, 27.798593), ),((19.657627, -167.295749, 27.056402), )，((18.274129, -157.144741, 25.15218), ))
# Return value:A Vertex object or a sequence of Vertex objects.

查找点

实例：

######选择一个点施加集中力a1 = mdb.models['Model-1'].rootAssemblyv1 = a1.instances['Part-1-1'].verticesverts1 = v1.findAt(((5.0,5.0,200.0),))region1 = a1.Set(vertices=verts1, name='Set-2')mdb.models['Model-1'].ConcentratedForce(name='Load-1', createStepName='Step-1', region=region1, cf3=1000.0, distributionType=UNIFORM, field='', localCsys=None)######选择两个点施加集中力a1 = mdb.models['Model-1'].rootAssemblyv1 = a1.instances['Part-1-1'].verticesverts1 = v1.findAt(((5.0,5.0,200.0),),((5.0,-5.0,200.0),))region1 = a1.Set(vertices=verts1, name='Set-2')mdb.models['Model-1'].ConcentratedForce(name='Load-1', createStepName='Step-1', region=region1, cf3=1000.0, distributionType=UNIFORM, field='', localCsys=None)#####选择四个点施加集中力a1 = mdb.models['Model-1'].rootAssemblyv1 = a1.instances['Part-1-1'].verticesverts1 = v1.findAt(((5.0,5.0,200.0),),((5.0,-5.0,200.0),),((-5.0,-5.0,200.0),),((-5.0,5.0,200.0),))region1 = a1.Set(vertices=verts1, name='Set-2')mdb.models['Model-1'].ConcentratedForce(name='Load-1', createStepName='Step-1', region=region1, cf3=1000.0, distributionType=UNIFORM, field='', localCsys=None)

查找线

示例：


#加载#一次选择一条边进行加载a = mdb.models['Model-1'].rootAssemblys1 = a.instances['Part-1-1'].edges#这个点的坐标只需要在这条线上即可，这个坐标位置处不一定得有关键点存在side1Edges1 =s1.findAt(((20.0,5.0,0.0),))region1 = a.Surface(side1Edges=side1Edges1, name='Surf-1')mdb.models['Model-1'].Pressure(name='Load-1', createStepName='Step-1', region=region1, distributionType=UNIFORM, field='', magnitude=-pp, amplitude=UNSET)#####一次选择两条边进行加载#这个点的坐标只需要在这条线上即可，这个坐标位置处不一定得有关键点存在side1Edges2 =s1.findAt(((10.0,10.0,0.0),),((-10.0,10.0,0),))region2 = a.Surface(side1Edges=side1Edges2, name='Surf-1')mdb.models['Model-1'].Pressure(name='Load-1', createStepName='Step-1', region=region2, distributionType=UNIFORM, field='', magnitude=-pp, amplitude=UNSET)#选择一条弧线进行加载import mathcood_x=5.0*math.sin(45.0/180.0*math.pi)cood_y=5.0*math.cos(45.0/180.0*math.pi)side1Edges3 =s1.findAt(((cood_x,cood_y,0.0),))region3 = a.Surface(side1Edges=side1Edges3, name='Surf-1')mdb.models['Model-1'].Pressure(name='Load-1', createStepName='Step-1', region=region3, distributionType=UNIFORM, field='', magnitude=-pp, amplitude=UNSET)#选择一个圆的四条弧线进行加载cood_x=5.0*math.sin(45.0/180.0*math.pi)cood_y=5.0*math.cos(45.0/180.0*math.pi)side1Edges4 =s1.findAt(((cood_x,cood_y,0.0),),((-cood_x,cood_y,0.0),),((-cood_x,-cood_y,0.0),),((cood_x,-cood_y,0.0),))region4 = a.Surface(side1Edges=side1Edges4, name='Surf-1')mdb.models['Model-1'].Pressure(name='Load-1', createStepName='Step-1', region=region4, distributionType=UNIFORM, field='', magnitude=-pp, amplitude=UNSET)#######选择一条边施加约束a = mdb.models['Model-1'].rootAssemblye1 = a.instances['Part-1-1'].edgesedges1 = e1.findAt(((-20.0,5.0,0.0),))region = a.Set(edges=edges1, name='Set-1')mdb.models['Model-1'].DisplacementBC(name='BC-1', createStepName='Step-1', region=region, u1=0.0, u2=0.0, ur3=UNSET, amplitude=UNSET, fixed=OFF, distributionType=UNIFORM, fieldName='', localCsys=None)mdb.models['Model-1'].boundaryConditions['BC-1'].move('Step-1', 'Initial')#######选择两条边施加约束edges1 = e1.findAt(((-20.0,5.0,0.0),),((-20.0,-5.0,0.0),))region = a.Set(edges=edges1, name='Set-1')mdb.models['Model-1'].DisplacementBC(name='BC-1', createStepName='Step-1', region=region, u1=0.0, u2=0.0, ur3=UNSET, amplitude=UNSET, fixed=OFF, distributionType=UNIFORM, fieldName='', localCsys=None)mdb.models['Model-1'].boundaryConditions['BC-1'].move('Step-1', 'Initial')#######选择一条弧线施加约束import mathcood_x=5.0*math.sin(45.0/180.0*math.pi)cood_y=5.0*math.cos(45.0/180.0*math.pi)edges1 = e1.findAt(((cood_x,cood_y,0.0),))region = a.Set(edges=edges1, name='Set-1')mdb.models['Model-1'].DisplacementBC(name='BC-1', createStepName='Step-1', region=region, u1=0.0, u2=0.0, ur3=UNSET, amplitude=UNSET, fixed=OFF, distributionType=UNIFORM, fieldName='', localCsys=None)mdb.models['Model-1'].boundaryConditions['BC-1'].move('Step-1', 'Initial')#######选择圆的四条弧线施加约束edges1 = e1.findAt(((cood_x,cood_y,0.0),),((-cood_x,cood_y,0.0),),((-cood_x,-cood_y,0.0),),((cood_x,-cood_y,0.0),))region = a.Set(edges=edges1, name='Set-1')mdb.models['Model-1'].DisplacementBC(name='BC-1', createStepName='Step-1', region=region, u1=0.0, u2=0.0, ur3=UNSET, amplitude=UNSET, fixed=OFF, distributionType=UNIFORM, fieldName='', localCsys=None)mdb.models['Model-1'].boundaryConditions['BC-1'].move('Step-1', 'Initial')

查找面

示例：

a = mdb.models['Model-1'].rootAssemblys1 = a.instances['Part-1-1'].facesside1Faces1 = s1.getSequenceFromMask(mask=('[#20 ]', ), )region1 = a.Surface(side1Faces=side1Faces1, name='Surf-1')mdb.models['Model-1'].Pressure(name='Load-1', createStepName='Step-1', region=region1, distributionType=UNIFORM, field='', magnitude=10.0, amplitude=UNSET)######选择一个面加载a = mdb.models['Model-1'].rootAssemblys1 = a.instances['Part-1-1'].facesside1Faces1 = s1.findAt(((0.0,0.0,200.0),))region = a.Surface(side1Faces=side1Faces1, name='Surf-1')mdb.models['Model-1'].Pressure(name='Load-1', createStepName='Step-1', region=region, distributionType=UNIFORM, field='', magnitude=10.0, amplitude=UNSET)######选择两个个面加载a = mdb.models['Model-1'].rootAssemblys1 = a.instances['Part-1-1'].facesside1Faces1 = s1.findAt(((0.0,0.0,200.0),),((0.0,5.0,100.0),))region = a.Surface(side1Faces=side1Faces1, name='Surf-1')mdb.models['Model-1'].Pressure(name='Load-1', createStepName='Step-1', region=region, distributionType=UNIFORM, field='', magnitude=10.0, amplitude=UNSET)######选择一个面施加约束a = mdb.models['Model-1'].rootAssemblyf1 = a.instances['Part-1-1'].facesfaces1 = f1.findAt(((0.0,0.0,0.0),))region = a.Set(faces=faces1, name='Set-1')mdb.models['Model-1'].DisplacementBC(name='BC-1', createStepName='Step-1', region=region, u1=0.0, u2=0.0, u3=UNSET, ur1=UNSET, ur2=UNSET, ur3=UNSET, amplitude=UNSET, fixed=OFF, distributionType=UNIFORM, fieldName='', localCsys=None)mdb.models['Model-1'].boundaryConditions['BC-1'].move('Step-1', 'Initial')######选择两个面施加约束a = mdb.models['Model-1'].rootAssemblyf1 = a.instances['Part-1-1'].facesfaces1 = f1.findAt(((0.0,0.0,200.0),),((0.0,5.0,100.0),))region = a.Set(faces=faces1, name='Set-1')mdb.models['Model-1'].DisplacementBC(name='BC-1', createStepName='Step-1', region=region, u1=0.0, u2=0.0, u3=UNSET, ur1=UNSET, ur2=UNSET, ur3=UNSET, amplitude=UNSET, fixed=OFF, distributionType=UNIFORM, fieldName='', localCsys=None)mdb.models['Model-1'].boundaryConditions['BC-1'].move('Step-1', 'Initial')

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Abaqus 利用FindAt函数根据坐标查找点，线，面

介绍

查找点

查找线

查找面

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