24feb10 - rio osap overview

7/29/2019 24Feb10 - Rio OSAP Overview

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Rio de Janeiro, Brazil24 February 2010

Overview of OSAP 2.0


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OSAP History

OSAP Objective & Scope of Work

Whats New in OSAP 2.0

Data Interfaces

Application Modules Summary

Outline


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OSAP 1.0 Released in October 2008OSAP public seminars in Houston, London,Singapore and China with over 400 attendees

OSAP 1.0.1 (Patch) Released in May 2009

OSAP 2.0 To be released in March 2010

OSAP History


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Current OSAP 1.0 Licensees

Americas15Pacific

3

Europe

5

SBM Offshore

Technip USA

Keppel FELS

Energo Engineering

IMPaC Offshore Eng

Huisman Special Lifting

Diamond Offshore

Exmar Offshore

GVA Consultants


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OSAP Objectives

Expedite Class Process

Provide a consistent interpretationof ABS class requirements

Facilitate ABS review process

Streamline the load, strength, bucklingand fatigue analysis of floating structuresincluding Semisubmersibles, TLPs,Spars and Drill Ships


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OSAP Scope of Work

Load Transfer

Structural FEA

Hydro Analysis

Code Check

OSAP 2.0


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Whats New?Whats New?


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Applicable to Offshore Drilling & Production FloatingStructures except for Ship-Shaped FPSOs/FSOs

OSAP 2.0 Extended Applications


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OSAP 2.0 Functional Modules

Six New or Enhanced Functional Modules

Load Generation

Design Wave

Load Mapping

Global Strength

Fatigue Assessment

Buckling Ultimate Strength


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OSAP 2.0 Enhanced Data Interfaces

OSAPData Interface

OSAPData Interface

OSAPCalculation Modules

OSAPCalculation Modules

OSAP NeutralFormat Files

AQWA

WAMITANSYS

NASTRAN

Other

Hydro & Structural

Analysis Software

User Defined

Data Interface


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New with OSAP 2.0: Load Generation

Inertia and drag forces on Morison elements

Dynamic forces exerted by mooring or tendons

Steady loads at equilibrium position

Sectional forces and moments calculation

Interface with AQWA and WAMIT


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New with OSAP 2.0: Load Mapping

Capability of mapping pressures, forces, andinternal tank loads from a hydro model to a FEA

model Functions of assisting load balancing

Interface with ANSYS and NASTRAN


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New with OSAP 2.0: Spectral Fatigue

Perform the spectral-based fatigue analysis

Calculate the Weibull Shape Parameter of

long-term distribution of stress range


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OSAP 2.0 Enhanced GUI & Graphics

Menus and

Toolbars

2D & 3DGraphics Display

Messages and

Log Details

Project

Tree

ApplicationSpecific

Operation


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3D HydrodynamicAnalysis Model

Geometry and Mesh

Generator

HydrodynamicAnalysis Program

FEA Solver

Global Structural FE Model(Coarse Mesh for Yielding and

Panel Buckling Check)

Global Structural FE Model(Locally Refined Mesh for

Fatigue Check)

Structural Responses(Stress, Strain and Displacement)

OSAP 2.0

User Selected Third-party Applications

Typical Design Workflow Using OSAP

Need LocalFEA

Local FE Modelwith Refined Mesh

Y

N

End

Yielding, Buckling &Fatigue Code CheckYielding, Buckling &Fatigue Code Check

Global FE Model, Loads,

and Constraints Input

Load Mapping

& Balancing

Load Mapping

& Balancing

Load Cases for Strength

& Fatigue Assessment

Design WaveCalculation

Design WaveCalculation

LoadGeneration

LoadGeneration

Critical Responses

RAOs

Motion RAOsPressure RAOs

Fluid Velocity (optional)


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Data InterfaceData Interface


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OSAP 2.0 Data Interface

Support the hydrodynamic solver

AQWA and WAMIT

Support the structural FEA solver

ANSYS and NASTRAN

Enhanced OSAP neutral files for developinguser defined data Interface programs


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A2ABSCHK: Standalone Interface with ANSYS

APDL Macro Program in

ANSYS Classic GUI

APDL Macro Program in

ANSYS Workbench


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Load GenerationLoad Generation


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Load Generation Module

OSAP Load

Generation ModuleOSAP Load

Generation Module

Motion and Pressure RAOs

Hydrodynamic Analysis Model

Critical Response RAOs

and Input for Load Mapping


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Load Generation Main Options

PerformSectional Force

& Moment

Calculation

Post-Process

Hydrodynamic &HydrostaticAnalysis Results


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Slicing Plane for Sectional Load RAOs

(Critical Response Parameters) Calculation

Slicing Plane

Substructure 1(Mass Points,

Pressures, Drag& Inertial Loads)

Substructure 2(Mass Points,

Pressures, Drag& Inertial Loads)


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Dynamic Loads on Morison Elements

Calculate Inertia Forces onMorison Elements

Calculate LinearizedDrag Forces Using aRepresentative Sea State

Define divisions of Morisonelement for distributing

inertia/drag forces


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Dynamic Forces by Mooring or Tendons

Define linear springs forcalculating the dynamicforces that can bemapped to the FE model


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Steady Loads at Equilibrium Position

Calculate steady loads at the

static equilibrium position of

a floating structure


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Output of Critical Load Parameter RAOs


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Output of Input to Load Mapping Module

OSAP Load Generationmodule provides theseinput to the LoadMapping calculation


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Design Wave CalculationDesign Wave Calculation


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Design Wave Module

OSAP Design

Wave ModuleOSAP DesignWave Module

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

0 0.5 1 1.5 2

Critical Response RAOs

Sea States

Design Wave Height,Period and Direction


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Reference to ABS Rules

ABS MODU Rules - Part 3 Hull Constructionand Equipment (2008), Chapter 2, Appendix 2

Download available at ABS websitewww.eagle.org


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Input for Design Wave Calculation


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Design Wave Curves

Zoom-in View


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Input to Load Mapping Module

OSAP Design Wave module

provides the input to the

Load Mapping module forcreating load cases inGlobal Strength and

Simplified Fatigue Analysis


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Load MappingLoad Mapping


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OSAP Load Mapping & Balancing Module

OSAP Load

Mapping Module

OSAP Load

Mapping Module

FEA Input Data for

ANSYS or NASTRAN

OSAP Load Generation &Design Wave Output

Structural FEA Model


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Input of Structural & Hydrodynamic Models

Structural Model &

Analysis Setting

Hydrodynamic

and Steady Loads


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Input of Mass and Constraints

Mass Model

BoundaryConditions


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Step-by-Step Execution of Load Mapping


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Hydrodynamic Pressure Mapping

Hydrodynamic Pressures

on AQWA Model

Pressures on FE ModelMapped by OSAP


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Load Mapping in Internal Tanks

Tank Definition

Internal Tank Pressure Distribution


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Global Strength CheckGlobal Strength Check

OSAP Gl b l S h Ch k


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OSAP Global Strength Check

OSAP Global

Strength Module

OSAP Global

Strength Module

FEA Result Files (*.strs)

Finite Element Mesh File (*.mesh)

Yielding Check andPlate Buckling Check

R f t ABS R l


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ABS MODU Rules - Part 3 Hull Constructionand Equipment (2008)

ABS Guide for Building and Classing FloatingProduction Installations (2009)

ABS Guide for Buckling and Ultimate StrengthAssessment of Offshore Structures (2008)

Download available at ABS websitewww.eagle.org

M i I t f Gl b l St th Ch k


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Main Input for Global Strength Check

P l D fi iti f B kli Ch k


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Panel Definition for Buckling Check

Option 1: Apply OSAP AutomaticPanel Search Function

Option2: Import an ExistingPanel Definition File

Global Strength Yielding Check


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Global Strength Yielding Check

Global Strength Plate Buckling Check


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Global Strength Plate Buckling Check

Interactive Data Query


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Interactive Data Query

Panel Visualization and Editing


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Panel Visualization and Editing


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Fatigue AnalysisFatigue Analysis



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ABS Guide for Fatigue Assessment ofOffshore Structures (2003)

ABS Guidance Notes on Spectral-base Fatiguefor Floating Offshore Structures (2005)

ABS Guide for Building and Classing FloatingProduction Installations (2009)

Download is available on ABS websitewww.eagle.org

Fatigue Analysis Modules in OSAP


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Fatigue Analysis Modules in OSAP

Simplified Fatigue Analysis Spectral Fatigue Analysis

Fatigue Analysis SN Curves


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Fatigue Analysis SN Curves

Simplified Fatigue Analysis - Loads


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Simplified Fatigue Analysis Loads

Use FEAResults

Use DirectInput of Stress

Simplified Fatigue Analysis Structural Details


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Simplified Fatigue Analysis Structural Details

Element Grouping for Structural Details


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Element Grouping for Structural Details

Simplified Fatigue Analysis Results


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S p ed at gue a ys s esu ts

Unity Check

Fatigue Life

Stress Range

Spectral Fatigue Analysis Stress RAOs


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p g y

Spectral Fatigue Analysis Structural Details


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p g y

Spectral Fatigue Analysis Wave Data


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p g y

Spectral Fatigue Analysis Results


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p g y

Stress Transfer Functions

Spectral Fatigue Analysis Results


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Fatigue Life, Code Check & Weibull Fitting


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Buckling & Ultimate

Strength Check

Buckling & Ultimate

Strength Check



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ABS Guide for Buckling and UltimateStrength Assessment of Offshore Structures(2008)

Download is available on ABS websitewww.eagle.org

Digitalized ABS Offshore Buckling Guide


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Covering Five Types of Structural Members


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Spreadsheet Type of Calculation Tool


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Analysis Reports with Extensive Details


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SummarySummary

Summary of OSAP 2.0 Main Capabilities


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Generate hydrodynamic loads for floatingoffshore structures

Transfer hydrodynamic loads to the structuralFEA model

Perform structural design code check for

yielding, buckling and fatigue Interface with leading hydrodynamic and

structural analysis software


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For Technical Questions

Email: [email protected]

24feb10 - rio osap overview

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