主要内容

evaluateReaction

Evaluate reaction forces on boundary

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Syntax

F = evaluateReaction(structuralresults,RegionType,RegionID)

Description

example

F= evaluateReaction(structuralresults,RegionType,区域)评估在指定的边界上的反作用力RegionType和区域. The function uses the global Cartesian coordinate system. For transient and frequency response structural models,evaluateReactionevaluates reaction forces for all time- and frequency-steps, respectively.

Examples

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打开实时脚本

Create a static structural model.

structuralmodel = createpde('structural','static-solid');

Create a cuboid geometry and include it in the model. Plot the geometry.

structuralmodel.Geometry = multicuboid(0.01,0.01,0.05); pdegplot(structuralmodel,'FaceLabels','on','FaceAlpha'，0.5）;

Figure contains an axes object. The axes object contains 3 objects of type quiver, patch, line.

指定Young的模量和Poisson的比例。

structuralProperties(structuralmodel,'Youngsmodulus',210E9,...'PoissonsRatio',0.3);

固定条的一端，并向另一端施加压力。

结构BC（结构模型，'Face',1,'Constraint','fixed')
ANS =具有属性的结构BC：regionType：'face'regionId：1矢量化：'OFF'边界约束和强制置换位移位移：[] xdisplacement：[] ydisplacement：[] ydisplacement：[] zdisplacement：[] zdisplacement：[] zdisplacement：[]约束：“固定” radius：[] radius：[] radius：[]参考：[]参考：[]参考：[]参考：[]参考：[]：[]标签：[]边界载荷力：[]表面效果：[]压力：[]转换速度：[]标签：[]
structuralBoundaryLoad(structuralmodel,'Face',2,'Pressure', 100)
ans = StructuralBC with properties: RegionType: 'Face' RegionID: 2 Vectorized: 'off' Boundary Constraints and Enforced Displacements Displacement: [] XDisplacement: [] YDisplacement: [] ZDisplacement: [] Constraint: [] Radius: [] Reference: [] Label: [] Boundary Loads Force: [] SurfaceTraction: [] Pressure: 100 TranslationalStiffness: [] Label: []

Generate a mesh and solve the problem.

generateMesh(structuralmodel,'hmax'，0.003）;structuralResults = solve（structuralModel）;

Compute the reaction forces on the fixed end.

reaction = evaluateReaction(structuralresults,'Face',1)
reaction =struct with fields:Fx: -1.3620e-06 Fy: 2.2303e-06 Fz: 0.0103
打开实时脚本

Evaluate the reaction forces at the fixed end of a beam subject to harmonic excitation.

Create a transient dynamic model for a 3-D problem.

structuralmodel = createpde('structural','transient-solid');

Create a geometry and include it in the model. Plot the geometry.

gm =多蛋布（0.06,0.005,0.01）;bunstoralModel.DEMETRY = GM;PDEGPLOT（结构模型，'FaceLabels','on','FaceAlpha',0.5) view(50,20)

Figure contains an axes object. The axes object contains 3 objects of type quiver, patch, line.

指定杨氏模量，泊松比和材料的质量密度。

structuralProperties(structuralmodel,'Youngsmodulus',210E9,...'PoissonsRatio'，0.3，...'MassDensity',7800);

Fix one end of the beam.

结构BC（结构模型，'Face'，5，'Constraint','fixed');

沿着沿着的正弦位移y-direction on the end opposite the fixed end of the beam.

结构BC（结构模型，'Face'，3，...'YDisplacement'，1E-4，...'频率'，50）;

生成网格。

generateMesh(structuralmodel,'hmax',0.01);

指定零初始位移和速度。

structuralIC(structuralmodel,'Displacement',[0;0;0],'Velocity',[0;0;0]);

Solve the model.

tlist = 0:0.002:0.2; structuralresults = solve(structuralmodel,tlist);

Compute the reaction forces on the fixed end.

reaction = evaluateReaction(structuralresults,'Face'，5）
reaction =struct with fields:FX：[101x1 double] FY：[101x1 double] fz：[101x1 double]

Input Arguments

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Solution of the structural analysis problem, specified as aStaticStructuralResults,构造术, orFrequencyStructuralResultsobject. Createstructuralresultsby using thesolvefunction.

Example:structuralResults = solve（structuralModel）

几何区域类型，指定为'Edge'for a 2-D model or'Face'对于3-D模型.

Example:evaluateReaction(structuralresults,'Face',2)

Data Types:char|string

几何区域ID，指定为正整数的向量。通过使用PDEGPLOT.

Example:evaluateReaction(structuralresults,'Face',2)

Data Types:double

Output Arguments

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反作用力，作为结构阵列返回。阵列场代表集成的反作用力和表面牵引矢量，通过使用边界和外部正常的应力状态计算出来。

版本嗨story

Introduced in R2017b

See Also

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