en pt de ja ja ja ja en en en ja ja ja ja ja ja ja ja zh de pt ja ja ja ja ja ja ja ja ja ja ja ja ja ja en en en en en en en en en ja en en en en en en en en en en en en ja ja ja ja ja ja ja ja ja pt de ja ja ja ja en en en ja ja ja ja ja ja ja ja zh en en en en en en en en en en sv de fr fr en it de zh en en en it fa en zh fr de pt en en en zh en pt sv de pt en en en eu en en en it nb en en en en it ja en ja en en en en en en en
MacNeal-Harder Test The Scordelis-Lo Roof is a classical benchmark problem for shell elements. Analytical and experimental investigations were initially performed by Scordelis and Lo.
NAFEMS Heat Transfer
NAFEMS Nonlinear Static Analysis
NAFEMS Dynamic Response Analysis
NAFEMS Random Response Analysis
NAFEMS Normal Modes Analysis
NAFEMS Composites
Response Spectrum Analysis
OS-V: 0700 Twisted Cantilever Beam (Implicit Results)
MacNeal-Harder Test This is a twisted cantilever beam solved with solid and shell elements. A model is made with each element's type to investigate the effect of distorted elements with a high aspect ratio.
OS-V: 0710 Curved Cantilever Beam
MacNeal-Harder Test This is a curved cantilever beam solved with solid and shell elements. A model is made with each element's type to investigate the effect of distorted elements with a high aspect ratio.
OS-V: 0720 Straight Cantilever Beam
MacNeal-Harder Test This is a straight cantilever beam solved with solid and shell elements. Three models (rectangular, parallelogram, trapezoidal) are made with each element's type to investigate the effect of distorted elements with a high aspect ratio.
OS-V: 0730 Scordelis-Lo Roof
MacNeal-Harder Test The Scordelis-Lo Roof is a classical benchmark problem for shell elements. Analytical and experimental investigations were initially performed by Scordelis and Lo.
OS-V: 0740 Curved Strip Hook
Raasch Challenge Raasch challenge is a curved strip hook problem with a tip in-plane shear load, posed in 1990 by Ingo Raasch of BMW in Germany. The problem poses a significant challenge to shell elements because of the inherent coupling between three modes of deformation: bending, extension, and twist. OptiStruct is benchmarked against the Raasch challenge to assure its shell elements performance on Linear Static Analysis.
OS-V: 0750 Radial Stretching of a Cylinder
Illustrates the use of asymmetrical elements (CTAXI) under uniform radial displacement in OptiStruct.
OS-V:0760 MacNeal-Harderソリッドパッチテスト
MacNeal-Harderテストこのパッチテストは、要素に関する古典的なベンチマーク問題です。テストに対して正しい結果が生成される場合は、その要素を使用して解析されたすべての問題の結果が正しい解に収束します。提示される問題セットの本来の目的は、さまざまな用途での有限要素の精度を特定することです。
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。
OS-V: 0730 Scordelis-Lo Roof
MacNeal-Harder Test The Scordelis-Lo Roof is a classical benchmark problem for shell elements. Analytical and experimental investigations were initially performed by Scordelis and Lo.
Search Help
OS-V: 0730 Scordelis-Lo Roof
MacNeal-Harder Test The Scordelis-Lo Roof is a classical benchmark problem for shell elements. Analytical and experimental investigations were initially performed by Scordelis and Lo.
図 1. FE Model of the Beam with Boundary Conditions and Loadcases
Benchmark Model
The roof structure is supported on both ends and loaded by self weight of 90 pounds per square foot, with only one quadrant modeled. Six types of elements are used for this problem. They are tria-shell, quad-shell, and hexa-solid elements, each with 1st and 2nd order. Each element type was benchmarked with different mesh density to check the convergence. As the original study was related to concrete structure, Poisson's ratio is set to zero. The structure is curved and its solution will exhibit membrane and bending behavior. Target solution for the vertical deflection at the midpoint of the free edge is 0.3024.
Linear Static Analysis Results
All results are normalized with the target value.
Number of Nodes - space per sides
図 2. Convergence check
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:
MacNeal, R.H., and Harder, R.L., A Proposed Standard Set of Problems to Test Finite Element Accuracy, Finite Elements in Analysis and Design, 1 (1985) 3-20.
© 2022 Altair Engineering, Inc. All Rights Reserved.
Intellectual Property Rights Notice | Technical Support