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Test No. 13OptiStruct is used to investigate the repeated eigenvalues.
OS-V: 0200 Simply-Supported Thin Square Plate
Test 21OptiStruct is used to investigate the repeated eigenvalues and the effect of ‘secondary’ restrains.
OS-V: 0220 3D Punch (Rounded Edges)
Contacts Benchmark 2 For quasi-static analysis using linear elastic material, geometric non-linearity and nonlinear boundary conditions.
OS-V: 0230 3D Loaded Pin
Contacts Benchmark 4 For Quasi-static analysis using Linear elastic material, geometric non-linearity and nonlinear boundary conditions. OptiStruct FE results examine the plot of contact pressure, tangential stress and relative tangential slip against angle .
OS-V: 0240 3D Steel Roller on Rubber
Contacts Benchmark 5For quasi-static analysis using linear elastic material, geometric non-linearity and nonlinear boundary conditions.
OS-V: 0250 3D Sheet Metal Forming
Contacts Benchmark 3 For quasi-static analysis using elastic plastic material, geometric non-linearity and nonlinear boundary conditions.
OS-V: 0260 Shell Bending under a Tip Load
A beam is analyzed for bending due to tip load. OptiStruct investigates the vertical steady-state displacement at the tip of the beam.
OS-V: 0270 Torsional Creep of Circular Shaft
This benchmark illustrates the structural response of a power law creeping material in a geometrical configuration subjected to pure torsion. OptiStruct examines strain at the edge of the shaft.
OS-V: 0280 Axisymmetric Elements - Interference Fit Between Two Cylinders
The model examines the contact pressure between two cylinders in case of interference fit of 20 mm.
OS-V: 0290 Lee's Frame Postbuckling
Examines the postbuckling behavior of an L-shaped frame (Lee’s frame) loaded by a vertical point load.
NAFEMS Dynamic Response Analysis
NAFEMS Random Response Analysis
NAFEMS Normal Modes Analysis
NAFEMS Composites
Response Spectrum Analysis
本セクションでは、OptiStructに関してよくある代表的な質問についてお答えしています。
本マニュアルでは、NAFEMSの問題を含めた検証モデルの解を紹介しています。
NAFEMS Nonlinear Static Analysis
OS-V: 0200 Simply-Supported Thin Square Plate
Test No. 13OptiStruct is used to investigate the repeated eigenvalues.
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OS-V: 0200 Simply-Supported Thin Square Plate
Test No. 13OptiStruct is used to investigate the repeated eigenvalues.
図 1. FE Model with Boundary Conditions and Loadcases
Benchmark Model
The 2nd order and 1st order quad elements are used to model the square plate of thickness 0.05m. The z-rotation and x, y translations are fixed for all the nodes, z-translation is fixed along all four edges, x-rotation is fixed along the edge x=0 and x=10 and y-rotation is fixed along the edge y=0 and y=10.
The material properties are:
Material Properties
Young’s Modulus
200 x 109 N/m2
Poisson’s Ratio
Modal Analysis Results
The frequency of each targeted mode is normalized with the closed form solution.
Closed form solution
Mode 2 and 3
1.021926053
1.066977913
1.076061121
1.013646055
1.015552897
1.053290494
Mode 5 and 6
Mode 7 and 8
1.176750173
1.175007606
1.002869198
1.065889334
Model Files
必要なモデルファイルのダウンロードについては、モデルファイルへのアクセスを参照してください。
The model files used in this problem include:
Test13HOE.fem
Test13LOE.fem
NAFEMS R0015 - Selected benchmarks for natural frequency analysis
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