ABS-134-2004.pdf
《ABS-134-2004.pdf》由会员分享,可在线阅读,更多相关《ABS-134-2004.pdf(58页珍藏版)》请在三一文库上搜索。
1、 GUIDANCE NOTES ON SAFEHULL FINITE ELEMENT ANALYSIS OF HULL STRUCTURES DECEMBER 2004 American Bureau of Shipping Incorporated by Act of Legislature of the State of New York 1862 Copyright 2004 American Bureau of Shipping ABS Plaza 16855 Northchase Drive Houston, TX 77060 USA Copyright American Burea
2、u of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 21:32:19 MDTNo reproduction or networking permitted without license from IHS -,-,- This Page Intentionally Left Blank Copyright American Bureau of Shipping Provided by IHS under license with
3、 ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 21:32:19 MDTNo reproduction or networking permitted without license from IHS -,-,- ABS GUIDANCE NOTES ON SAFEHULL FINITE ELEMENT ANALYSIS OF HULL STRUCTURES . 2004 iii GUIDANCE NOTES ON SAFEHULL FINITE ELEMENT ANALYSIS OF HULL STRUCTURES
4、CONTENTS SECTION 1 Introduction1 1 Objectives 1 3 Scope of Application1 5 Overview of Analysis Procedure1 7 Required Analyses.2 9 Supplementary Analyses.3 FIGURE 1 Overview of the FEA Model Functions and Analyses for SafeHull TSA 2 SECTION 2 Global 3D FEA Model.5 1 General 5 3 Extent of the Global 3
5、D FEA Model.5 5 Coordinate and Unit System of the Global Model .9 7 Element Types and Combination.10 9 Finite Element Modeling 11 9.1 Model for Responses 11 9.3 Element Size.11 11 FEA Model Verification 17 13 SafeHull Verification Tools.18 TABLE 1 Recommended Baseline Mesh Size and Mesh Order for Gl
6、obal Model 12 FIGURE 1 Extent of the 3D Global Model and Mesh Arrangement for Tankers.6 FIGURE 2 Extent of the 3D Global Model and Mesh Arrangement for Bulk Carriers.7 FIGURE 3 Extent of the 3D Global Model and Mesh Arrangement for Container Carriers 8 FIGURE 4 Model Coordinate System9 FIGURE 5 Typi
7、cal Mesh Arrangement of Aframax Oil Tankers13 Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 21:32:19 MDTNo reproduction or networking permitted without license from IHS -,-,- iv ABS GUIDANCE NOTES ON SAFEHULL FIN
8、ITE ELEMENT ANALYSIS OF HULL STRUCTURES . 2004 FIGURE 6 Typical Mesh Arrangement of VLCC Oil Tankers14 FIGURE 7 Typical Mesh Arrangement of Cape Size Bulk Carriers 15 FIGURE 8 Typical Mesh Arrangement of Container Carriers .16 FIGURE 9 SafeHull Nastran Model Check Tool18 FIGURE 10 SafeHull Groups an
9、d Displays the Model by Grouping Parts.18 SECTION 3 Loading and Boundary Conditions19 1 General 19 3 Loading and Loading Patterns.19 5 Load Combination Factor and Load Cases.20 7 Identify Compartments.20 9 Apply Load Components to Compartment Boundaries.21 11 Pressure Superposition and Force Convers
10、ion.21 13 Hull Girder Loads and Load Equilibrium22 15 Boundary Conditions23 15.1 Supporting Rod and Its Property.23 15.3 Tankers .24 15.5 Bulk Carriers26 15.7 Containership Models27 15.9 Boundary Constraint Beams on the Two End Sections.28 TABLE 1 Steel Vessel Rules Specified Loading Criteria (150 m
11、 or More in Length) .19 TABLE 2 Steel Vessel Rules Specified Loading Patterns.20 TABLE 3 Steel Vessel Rules Specified Loading Combination Factors.20 FIGURE 1 SafeHull “View Tank Boundaries” and “Search Log File” Tools 21 FIGURE 2 SafeHull “View Tank and Frame Load” Tool22 FIGURE 3 View Curves of Hul
12、l Girder Load in the SafeHull System.23 FIGURE 4 Spring Supports for Tanker Global Models25 FIGURE 5 Spring Supports at Fore End of Bulk Carrier Global Models26 FIGURE 6 Spring Supports at Aft End for Container Carrier Global Models28 FIGURE 7 Spring Supports at Fore End for Container Carrier Global
13、 Models28 SECTION 4 Evaluation.31 1 General 31 3 Checking Global Model Response 31 5 Plate Panels for Evaluation33 Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/5910770001 Not for Resale, 08/07/2008 21:32:19 MDTNo reproduction or networking permitted
14、 without license from IHS -,-,- ABS GUIDANCE NOTES ON SAFEHULL FINITE ELEMENT ANALYSIS OF HULL STRUCTURES . 2004 v 7 Yielding Strength33 7.1 Yielding Criteria for Watertight Members 33 7.3 Yielding Criteria for Non-watertight Members .34 9 Buckling Strength.34 9.1 Buckling Criteria for Watertight Me
15、mbers34 9.3 Buckling Criteria for Non-Watertight Members34 11 Fatigue Strength 35 TABLE 1 Steel Vessel Rules-specified Loading Criteria (150 meters or more in length).31 FIGURE 1 View FEA Solution in SafeHull System32 FIGURE 2 Overall Deformation of Three Cargo Model for Load Case 132 SECTION 5 Crit
16、ical Areas37 1 Tanker37 1.1 Transverse Web37 1.3 Horizontal Stringer Sections39 1.5 Longitudinal Girder Sections.39 3 Bulk Carrier39 5 Containership.43 FIGURE 1 Critical Areas Tankers.37 FIGURE 2 Critical Areas for Typical General Bulk Carriers41 FIGURE 3 Critical Areas for Typical Containerships, T
17、ransverse Sections44 FIGURE 4 Critical Areas for Typical Containerships, Deck 5-1-3/3.1-5.3 5-1-3/5.5 5-1-3/5.7 Bulk Carriers 3-2-1/3.1-3.5; 5-3-3/3.1-5.3 5-3-3/5.5 5-3-3/5.7 Container Carriers 3-2-1/3.1-3.5; 5-3-3/3.1-5.1 5-3-3/5.3 5-3-3/5.5 The Steel Vessel Rules also specifies the loading pattern
18、s, considering the wave conditions and all possible cargo or ballast arrangements to create the worst case loading condition. Section 3, Table 2 lists the Steel Vessel Rules specified load patterns. Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=Boeing Co/59107
19、70001 Not for Resale, 08/07/2008 21:32:19 MDTNo reproduction or networking permitted without license from IHS -,-,- Section 3 Loading and Boundary Conditions 20 ABS GUIDANCE NOTES ON SAFEHULL FINITE ELEMENT ANALYSIS OF HULL STRUCTURES . 2004 TABLE 2 Steel Vessel Rules Specified Loading Patterns Vess
20、el Type Hull Girder Loads Tankers 5-1-3/Figure 1 5-1-A1 Bulk Carriers 5-3-5/3 5-3-5/5 5-3-A1 Container Carriers 5-5-5/3.1-3.5 5-5-5/5.1-5.13 5-5-A1 The evaluations associated with the Global FEA are detailed in the following sections. The evaluations associated with additional local fine mesh analys
21、es are included in The Finite Element Guide for Hull Structures, Local 3D Approach. 3 Checking Global Model Response The global FE model response check serves two main purposes: i) To verify overall accuracy of the global model ii) To confirm the proper handling of local and hull-girder loads First,
22、 the overall deformations of global models should be checked visually. The SafeHull system provides the visualization tool to review the FEA results in terms of deformations and stresses (see Section 4, Figure 1). If global models consist of membrane and rod elements, abnormal deformation of structu
23、ral members may result. This is usually due to loading on unsupported structural nodes. If this is the case, appropriate nodal point constraints (such as slave-master constraints) or load shifting must be applied. Copyright American Bureau of Shipping Provided by IHS under license with ABS Licensee=
24、Boeing Co/5910770001 Not for Resale, 08/07/2008 21:32:19 MDTNo reproduction or networking permitted without license from IHS -,-,- Section 4 Evaluation 32 ABS GUIDANCE NOTES ON SAFEHULL FINITE ELEMENT ANALYSIS OF HULL STRUCTURES . 2004 FIGURE 1 View FEA Solution in SafeHull System FIGURE 2 Overall D
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ABS 134 2004
链接地址:https://www.31doc.com/p-3728200.html