Overview

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The purpose of this chapter is to demonstrate the correctness of result postprocessing plots, graphs, reports, and result combinations and derivations in Patran. A number of representative models are used to illustrate this validation and verification. In most cases very simple models are used for simplicity and clarity. Many of these models have closed form solution which are compared to the finite element solutions as displayed in Patran. The main purpose of this chapter, however, is to show that Patran correctly displays results as reported and calculated by the finite element solver. It is not to prove that any particular finite element solver calculates the correct answers.

Care has been taken to ensure that as much functionality as possible is covered by these examples. As new postprocessing capabilities are added to Patran from release to release, this chapter will increase its scope. Each problem gives a description of pertinent information that any engineer should be aware of when postprocessing results. These include:

All problem files have been provided with the Patran delivery and are indicated with each problem if the user wishes to investigate them personally. below gives a brief description of each problem. These files are located in a directory in the main Patran installation directory called:

Table 14‑1
Problem	Description	Features Validated
Problem 1: Linear Statics, Rigid Frame Analysis	MSC Nastran, Solution 101, Linear Statics, Deformation and Fringe Plots of Displacement Results.	prob001.bdf prob001.op2
Problem 2: Linear Statics, Cross-Ply Composite Plate Analysis	MSC Nastran, Solution 101, Linear Statics, Fringe Plots of Cross-Ply Stress Results with Coordinate Transformation to Global System.	prob002.bdf prob002.op2
Problem 3: Linear Statics, Principal Stress and Stress Transformation	MSC Nastran, Solution 101, Linear Statics, Fringe and Tensor Plots of Stress Tensor and Principal Stresses in Beam.	prob003.bdf prob003.op2
Problem 4: Linear Statics, Plane Strain with 2D Solids	MSC Nastran, Solution 101, Linear Statics, Displacement Plots and Fringe Plots of Stress and Displacement with Local Coordinate Transformations.	prob004.bdf prob004.op2
Problem 5: Linear Statics, 2D Shells in Spherical Coordinates	MSC Nastran, Solution 101, Linear Statics, Deformation and Fringe Plots of Stress with Spherical Coordinate Transformations.	prob005.bdf prob005.op2
Problem 6: Linear Statics, 2D Axisymmetric Solids	MSC Nastran, Solution 101, Linear Statics, Deformation and Fringe Plots of Stress Using Axisymmetric Elements.	prob006.bdf prob006.op2
Problem 7: Linear Statics, 3D Solids and Cylindrical Coordinate Frames	MSC Nastran, Solution 101, Linear Statics, Repeat of Problem 6 Using Solid Elements and Cylindrical Frame.	prob007.bdf prob007.op
Problem 8: Linear Statics, Pinned Truss Analysis	MSC Nastran, Solution 101, Linear Statics, Displacement Plots and Fringe Plots of Deflection, Stress and Rod Forces.	prob008.bdf prob008.op2
Problem 9: Nonlinear Statics, Large Deflection Effects	MSC Nastran, Solution 106, Non-Linear Statics, Large Displacements, Displacement Fringe Plots of Deflection of a Plate Modeled with CQUAD4 and CQUAD8, CTRIA3 and CTRIA6 Element Types.	prob009_Q4.bdf prob009_Q4.op2 prob009_Q8.bdf prob009_Q8.op2 prob009_T3.bdf prob009_T3.op2 prob009_T6.bdf prob009_T6.op2
Problem 10: Linear Statics, Thermal Stress with Solids	MSC Nastran, Solution 101, Linear Statics, Fringe Plots Stress due to Thermal Gradient.	prob010.bdf prob010.op2
Problem 11: Superposition of Linear Static Results	MSC Nastran, Solution 101, Linear Statics, Fringe Plots of Deflection and Linear Superposition.	prob011_A.bdf prob011_A.op2 prob011_B.bdf prob011_B.op2 prob011_C.bdf prob011_C.op2
Problem 12: Nonlinear Statics, Post-Buckled Column	MSC Nastran, Solution 106, Non-Linear Statics, Displacement, Fringe and Vector Plots of Deflection.	prob012.bdf prob012.op2
Problem 13: Nonlinear Statics, Beams with Gap Elements	MSC Nastran, Solution 106, Non-Linear Statics, Displacement and Fringe Plots of Deflection.	prob013.bdf prob013.op2
Problem 14: Normal Modes, Point Masses and Linear Springs	MSC Nastran, Solution 103, Normal Modes, Vector Plots of Mode Shapes.	prob014.bdf prob014.op2
Problem 15: Normal Modes, Shells and Cylindrical Coordinates	MSC Nastran, Solution 103, Normal Modes, Deformation and Fringe Plots of Mode Shapes using h-Element Formulation.	prob015.bdf prob015.op2
Problem 16: Normal Modes, Pshells and Cylindrical Coordinates	MSC Nastran, Solution 103, Normal Modes, Deformation and Fringe Plots of Mode Shapes using p-Element Formulation.	prob016.bdf prob016.op2
Problem 17: Buckling, shells and Cylindrical Coordinates	MSC Nastran, Solution 105, Buckling, Deformation and Fringe Plot of Buckled Cylinder.	prob017.bdf prob017.op2
Problem 18: Buckling, Flat Plates	MSC Nastran, Solution 105, Buckling, Deformation and Fringe Plot of Buckled Plate.	prob018.bdf prob018.op2
Problem 19: Direct Transient Response, Solids and Cylindrical Coordinates	MSC Nastran, Solution 109, Direct Transient Response, Graph and Fringe Plots of Responses.	prob019_T.bdf prob019_T.op2 prob019_S.bdf prob019_S.op2
Problem 20:Modal Transient Response with Guyan Reduction and Bars, Springs, Concentrated Masses and Rigid Body Elements	MSC Nastran, Solution 112, Modal Transient Response, Graph and Plots of Responses.	prob020.bdf prob020.op2
Problem 21: Direct Nonlinear Transient, Stress Wave Propagation with 1D Elements	MSC Nastran, Solution 129, Nonlinear Transient Response, Graph Plots of Responses.	prob021.bdf prob021.op2
Problem 22: Direct Nonlinear Transient, Impact with 1D, Concentrated Mass and Gap Elements	MSC Nastran, Solution 129, Nonlinear Transient Response, Graph Plots of Responses.	prob022.bdf prob022.op2
Problem 23: Direct Frequency Response, Eccentric Rotating Mass with Variable Damping	MSC Nastran, Solution 108 Direct Frequency Response, Graph Plots of Responses.	prob023_1.bdf prob023_1.op2 prob023_2.bdf prob023_2.op2 prob023_3.bdf prob023_3.op2
Problem 24: Modal Frequency Response, Enforced Base Motion with Modal Damping and Rigid Body Elements	MSC Nastran, Solution 103 & 111, Modal Frequency Response, Fringe Plots of Mode Shapes, Graph Plots of Responses.	prob024_1.bdf prob024_1.op2 prob024_2.bdf prob024_2.op2
Problem 25:Modal Frequency Response, Enforced Base Motion with Modal Damping and Shell P-Elements	MSC Nastran, Solution 111, Modal Frequency Response, Graph Plots of Responses.	prob025.bdf prob025.op2
Problem 26: Complex Modes, Direct Method	MSC Nastran, Solution 107, Complex Modes, Direct Method, Fringe and Deformation Plots of Modes.	prob026.bdf prob026.op2
Problem 27: Steady State Heat Transfer, Multiple Cavity Enclosure Radiation	MSC Nastran, Solution 153, Steady State Heat Transfer, Fringe Plots of Temperature and Radiation Heat Flux.	prob027.bdf prob027.op2
Problem 28: Transient Heat Transfer with Phase Change	MSC Nastran, Solution 159, Transient Thermal Analysis, Graph Plots of Temperature Responses.	prob028.bdf prob028.op2
Problem 29: Steady State Heat Transfer, 1D Conduction and Convection	MSC Nastran, Solution 153, Steady State Heat Transfer, Fringe Plots of Temperatures.	prob029.bdf prob029.op2
Problem 30: Freebody Loads, Pinned Truss Analysis	MSC Nastran, Solution 101, Linear Statics, Freebody Plots.	prob030.bdf prob030.op2

Table 14‑1

Problem

Description

Features Validated

Problem 1: Linear Statics, Rigid Frame Analysis

MSC Nastran, Solution 101, Linear Statics, Deformation and Fringe Plots of Displacement Results.

prob001.bdf
prob001.op2

Problem 2: Linear Statics, Cross-Ply Composite Plate Analysis

MSC Nastran, Solution 101, Linear Statics, Fringe Plots of Cross-Ply Stress Results with Coordinate Transformation to Global System.

prob002.bdf
prob002.op2

Problem 3: Linear Statics, Principal Stress and Stress Transformation

MSC Nastran, Solution 101, Linear Statics, Fringe and Tensor Plots of Stress Tensor and Principal Stresses in Beam.

prob003.bdf
prob003.op2

Problem 4: Linear Statics, Plane Strain with 2D Solids

MSC Nastran, Solution 101, Linear Statics, Displacement Plots and Fringe Plots of Stress and Displacement with Local Coordinate Transformations.

prob004.bdf
prob004.op2

Problem 5: Linear Statics, 2D Shells in Spherical Coordinates

MSC Nastran, Solution 101, Linear Statics, Deformation and Fringe Plots of Stress with Spherical Coordinate Transformations.

prob005.bdf
prob005.op2

Problem 6: Linear Statics, 2D Axisymmetric Solids

MSC Nastran, Solution 101, Linear Statics, Deformation and Fringe Plots of Stress Using Axisymmetric Elements.

prob006.bdf
prob006.op2

Problem 7: Linear Statics, 3D Solids and Cylindrical Coordinate Frames

MSC Nastran, Solution 101, Linear Statics, Repeat of Problem 6 Using Solid Elements and Cylindrical Frame.

prob007.bdf
prob007.op

Problem 8: Linear Statics, Pinned Truss Analysis

MSC Nastran, Solution 101, Linear Statics, Displacement Plots and Fringe Plots of Deflection, Stress and Rod Forces.

prob008.bdf
prob008.op2

Problem 9: Nonlinear Statics, Large Deflection Effects

MSC Nastran, Solution 106, Non-Linear Statics, Large Displacements, Displacement Fringe Plots of Deflection of a Plate Modeled with CQUAD4 and CQUAD8, CTRIA3 and CTRIA6 Element Types.

prob009_Q4.bdf
prob009_Q4.op2
prob009_Q8.bdf
prob009_Q8.op2
prob009_T3.bdf
prob009_T3.op2
prob009_T6.bdf
prob009_T6.op2

Problem 10: Linear Statics, Thermal Stress with Solids

MSC Nastran, Solution 101, Linear Statics, Fringe Plots Stress due to Thermal Gradient.

prob010.bdf
prob010.op2

Problem 11: Superposition of Linear Static Results

MSC Nastran, Solution 101, Linear Statics, Fringe Plots of Deflection and Linear Superposition.

prob011_A.bdf
prob011_A.op2
prob011_B.bdf
prob011_B.op2
prob011_C.bdf
prob011_C.op2

Problem 12: Nonlinear Statics, Post-Buckled Column

MSC Nastran, Solution 106, Non-Linear Statics, Displacement, Fringe and Vector Plots of Deflection.

prob012.bdf
prob012.op2

Problem 13: Nonlinear Statics, Beams with Gap Elements

MSC Nastran, Solution 106, Non-Linear Statics, Displacement and Fringe Plots of Deflection.

prob013.bdf
prob013.op2

Problem 14: Normal Modes, Point Masses and Linear Springs

MSC Nastran, Solution 103, Normal Modes, Vector Plots of Mode Shapes.

prob014.bdf
prob014.op2

Problem 15: Normal Modes, Shells and Cylindrical Coordinates

MSC Nastran, Solution 103, Normal Modes, Deformation and Fringe Plots of Mode Shapes using h-Element Formulation.

prob015.bdf
prob015.op2

Problem 16: Normal Modes, Pshells and Cylindrical Coordinates

MSC Nastran, Solution 103, Normal Modes, Deformation and Fringe Plots of Mode Shapes using p-Element Formulation.

prob016.bdf
prob016.op2

Problem 17: Buckling, shells and Cylindrical Coordinates

MSC Nastran, Solution 105, Buckling, Deformation and Fringe Plot of Buckled Cylinder.

prob017.bdf
prob017.op2

Problem 18: Buckling, Flat Plates

MSC Nastran, Solution 105, Buckling, Deformation and Fringe Plot of Buckled Plate.

prob018.bdf
prob018.op2

Problem 19: Direct Transient Response, Solids and Cylindrical Coordinates

MSC Nastran, Solution 109, Direct Transient Response, Graph and Fringe Plots of Responses.

prob019_T.bdf
prob019_T.op2
prob019_S.bdf
prob019_S.op2

Problem 20:Modal Transient Response with Guyan Reduction and Bars, Springs, Concentrated Masses and Rigid Body Elements

MSC Nastran, Solution 112, Modal Transient Response, Graph and Plots of Responses.

prob020.bdf
prob020.op2

Problem 21: Direct Nonlinear Transient, Stress Wave Propagation with 1D Elements

MSC Nastran, Solution 129, Nonlinear Transient Response, Graph Plots of Responses.

prob021.bdf
prob021.op2

Problem 22: Direct Nonlinear Transient, Impact with 1D, Concentrated Mass and Gap Elements

MSC Nastran, Solution 129, Nonlinear Transient Response, Graph Plots of Responses.

prob022.bdf
prob022.op2

Problem 23: Direct Frequency Response, Eccentric Rotating Mass with Variable Damping

MSC Nastran, Solution 108 Direct Frequency Response, Graph Plots of Responses.

prob023_1.bdf
prob023_1.op2
prob023_2.bdf
prob023_2.op2
prob023_3.bdf
prob023_3.op2

Problem 24: Modal Frequency Response, Enforced Base Motion with Modal Damping and Rigid Body Elements

MSC Nastran, Solution 103 & 111, Modal Frequency Response, Fringe Plots of Mode Shapes, Graph Plots of Responses.

prob024_1.bdf
prob024_1.op2
prob024_2.bdf
prob024_2.op2

Problem 25:Modal Frequency Response, Enforced Base Motion with Modal Damping and Shell P-Elements

MSC Nastran, Solution 111, Modal Frequency Response, Graph Plots of Responses.

prob025.bdf
prob025.op2

Problem 26: Complex Modes, Direct Method

MSC Nastran, Solution 107, Complex Modes, Direct Method, Fringe and Deformation Plots of Modes.

prob026.bdf
prob026.op2

Problem 27: Steady State Heat Transfer, Multiple Cavity Enclosure Radiation

MSC Nastran, Solution 153, Steady State Heat Transfer, Fringe Plots of Temperature and Radiation Heat Flux.

prob027.bdf
prob027.op2

Problem 28: Transient Heat Transfer with Phase Change

MSC Nastran, Solution 159, Transient Thermal Analysis, Graph Plots of Temperature Responses.

prob028.bdf
prob028.op2

Problem 29: Steady State Heat Transfer, 1D Conduction and Convection

MSC Nastran, Solution 153, Steady State Heat Transfer, Fringe Plots of Temperatures.

prob029.bdf
prob029.op2

Problem 30: Freebody Loads, Pinned Truss Analysis

MSC Nastran, Solution 101, Linear Statics, Freebody Plots.

prob030.bdf
prob030.op2