# Search the Community

Showing results for tags 'Analysis'.

• ### Search By Tags

Type tags separated by commas.

### Forums

• Altair Support Forum
• Welcome to Altair Support Forum
• Installation , Licensing and Altair One
• Modeling & Visualisation
• Solvers & Optimization
• Multi Body Simulation
• Conceptual design and Industrial design
• Model-Based Development
• Manufacturing Simulation
• CAE Process Automation
• APA - Composites
• APA - CFD & Thermal
• APA - Vehicle Dynamics
• APA - Manufacturing
• APA - Crash and Safety
• APA - Noise, Vibration and Harshness
• APA - System Level Design
• APA - Structural and Fatigue
• APA - Marine
• APA - Optical Design
• Japanユーザーフォーラム
• ユーザーフォーラムへようこそ
• Altair製品の意外な活用例
• インストール / ライセンス / Altair One / その他
• モデリング（プリプロセッシング）
• シミュレーション技術（ソルバー）
• データ可視化（ポストプロセッシング）
• モデルベース開発
• コンセプト設計と工業デザイン
• 製造シミュレーション
• CAE プロセスの自動化
• エンタープライズソリューション
• データアナリティクス
• 学生向け無償版(Altair Student Edition)

• 0 Replies

• 0 Reviews

Found 1 result

1. ## Different Mass Calculations

Hello, I'm to optimize an CFRP drive shaft for an formula student race car. The shaft itself is produced in a winding process. The tulips of the homokinetic joints are glued into the ends of the shaft. For that I created a model with a PCOMPP property and a laminate with 4 plies. The tulips are simplified as rod elements with HyperBeam tubesections and PROD properties with characteristical values of aluminium. The measurements are: length of the shaft: ca. 300 mm inner diameter: 65 mm laminate thickness: 8 mm length of the rods: 80 mm inner diameter of the tulips: 45 mm If I run an analysis of the model and check the out.file, the mass is calculated as about 1350g. If I run the free-size optimization afterwards, the mass before the first iteration is calculated as 1270g. I don't understand why the two values aren't the same. Is the calculated mass in the analysis the mass of the tulips and the shaft an the mass before the free-size optimization only the mass of the shaft because of the objective function? I don't really get, why there is a difference. Because the mass of the tulips should be about 600g and not 100g. The objective funktion ist minmass and the contraints are set by the displacement of the nodes of one end of the shaft.
×
×
• Create New...