Ship Structure Analysis-船舶结构分析.pdf

Analysis of Ship Structures A discussion paper on the use of structural analysis software for the design of ship structures July 2005 CONTENTS 1. Introduction 1 About the Authors 1 2. Recent History 1 3. Classification Societies 2 4. Designer Responsibilities 3 5. Commercial Considerations 3 6. Three Types of Ship Structures 4 Plate Fields 4 Simple Beams 4 Complex Beam Structures 4 7. Three Methods of Analysis 5 Spreadsheets 5 Beam Modelling 5 Finite Element Modelling 10 8. Four Types of Analysis Output 11 Stress 11 Deflection 11 Modal Analysis 11 Forced Dynamic Response 12 9. Geometry Creation 12 10. Application of Loads 13 11. Selection of Boundary Conditions 14 12. Model Verification 15 Geometry 15 Loads 15 Boundary Conditions 15 Comparative Calculations 15 13. Beam Modelling Examples using Multiframe 15 14. Automating The Design Process 34 15. Selecting Your Software 35 Logical Menu Layout 35 Graphics 35 3D Geometry Based Modelling 35 Editing Commands 36 Layer Commands 36 Libraries 36 Macro Language 36 Training and Support 36 16. Future Trends 37 17. Summary 37 18. Recommended Reading 38 2 1. Introduction In recent years the world has seen a dramatic improvement in computer technology with regard to both hardware and software. These improvements have made it possible for engineering designers to access software and analysis capabilities that were once reserved only for those who specialised in numerical analysis. This paper is aimed at the designer of ship structures who wishes to enhance and improve