ANSYS structural and offshore solutions for the ... · offshore solutions for the renewablesrenewablesand marine and marine sectors ... rotor dynamics, ... • Offshore Structures

ANSYS structural and ANSYS structural and offshore solutions for the offshore solutions for the renewablesrenewables and marine and marine

sectorssectors

ANSYS structural and ANSYS structural and offshore solutions for the offshore solutions for the renewablesrenewables and marine and marine

sectorssectors

© 2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary© 2010 ANSYS, Inc. All rights reserved. 1 ANSYS, Inc. Proprietary

Joe Joe LuxmooreLuxmooreTechnical ServicesTechnical Services

ANSYSANSYS UK LtdUK Ltd

Joe Joe LuxmooreLuxmooreTechnical ServicesTechnical Services

ANSYSANSYS UK LtdUK Ltd

Contents

• ANSYS structural products

• ANSYS AQWA hydrodynamics

• ANSYS composites solutions

© 2010 ANSYS, Inc. All rights reserved. 2 ANSYS, Inc. Proprietary

ANSYS Mechanical Products

• Scalable mechanical

solutions for stress

and vibration

– ANSYS DesignSpace

– ANSYS Professional


– ANSYS Professional

– ANSYS Structural

– ANSYS Mechanical One interface, one solver – different

feature levels

ANSYS Mechanical Capabilities

• Static analysis

– Nonlinear geometric

– Nonlinear material

– Nonlinear contact

• Dynamic analysis


• Dynamic analysis

– Modal, harmonic

response, random

vibration, rotor dynamics,

and nonlinear transient

ANSYS ASAS

• Offshore Structural FE Analysis

• Coupled wave/current/wind-structure interaction with nonlinear

structural response

• Fatigue assessment with irregular waves and using deterministic and

spectral methods

• For more than 30 years, ASAS has been successfully used for


• For more than 30 years, ASAS has been successfully used for

analyzing a large variety of offshore structures subjected to wave,

current and wind loading

– More than half of all North Sea jacket structures have been

designed with the aid of ASAS

• CAE requirements for other offshore structures are very similar!

ANSYS ASAS applications

• Offshore Structures– Fixed

• Steel Jackets

• Concrete

– Compliant

• Jack-ups

– Floating

Images courtesy of Arup, Moss Maritime AS, Technip Offshore Finland and REpower Systems AG


– Floating• FPSOs

• SPARS

• Semi-Submersibles

• Tension Leg Platforms

– Risers

– Offshore Wind Turbines

• Harbours

• Ships– Design

– Offloading

ANSYS ASAS applications

• Some example applications

Courtesy of Fraunhofer CWMT

Offshore Wind Turbines


Courtesy of REpower Systems AG

Jacket Structures

Transportation of Spar Truss on Heavy Lift VesselCourtesy of Technip Offshore Finland

Tidal Turbine Structure

ANSYS ASAS roadmap

• ASAS to Mechanical

– Beam Modeling

– Wave theories

– Soil-Pile-Structure Interaction


• Design Assessment

– New Design Assessment system in

Mechanical

– Additional code checking products

ANSYS AQWA

• Comprehensive Hydrodynamic capabilities

– Diffraction/Radiation including Morison elements

– Frequency Domain analysis

– Stability including mooring lines

– Time domain with irregular waves


– Time domain with non-linear survival waves

– Coupled Cable Dynamics

– Multiple hydrodynamic interaction and articulations (up to

50 structures)

– Transfer of motions and Pressures to ASAS & ANSYS

FE models

ANSYS AQWA

• Some example applications


Shielding

Vessel Loading Transfer from

AQWA to MechanicalCourtesy of Vuyk Engineering Rotterdam

FPSO & TLP Concept Offloading Operation Courtesy of SBMJacket Launch Courtesy of Gusto MSC

Development and Validation

of Octabuoy Concept

Courtesy of Moss Maritime AS

AQWA in Workbench

• Initial implementation at 12.1 of Hydrodynamic

Diffraction system

• Hydrodynamic Time Response introduced for 13.0

• Time history analysis of bodies, subject to environmental

forces including mooring lines


AQWA in Workbench

• Cable connections for rigid

body motion, wave and

mooring line analysis under

various ocean environments

• Ocean Environment Definition

for Wind, Wave and Current


for Wind, Wave and Current

• Additional Structure Force

Time History

• Cable Winching and Failures

• Input of catenary mooring

lines

• Realistic viewing of mooring

lines

ANSYS Composite Analysis

• ANSYS Mechanical

– Element and material

technology

• ANSYS Composite

Prep/Post (ACP)


Prep/Post (ACP)

ANSYS Mechanical

• Composite capabilities

– Composite section

tools, and interfaces to

third-party data


– Structural and thermal

finite elements

– Extensive library of

nonlinear material

models

ANSYS Mechanical

• Composite element types

Layered Solid

Shell

Beam/Pipe/Elbow


Solid-Shell Discrete/Smeared

Reinforcement

ACP Workflow

• ANSYS Mechanical

– Geometry interface

– FEA solver

• ANSYS Composite

PrepPost

CAD Model

ANSYS Geometric

changes


PrepPost

– Iterations for

material, orientations

and ply definitions

ANSYS

Mechanical

ANSYS

Composite

PrepPost

changes

required

Iterations for material,

orientation, and ply

definitions

Mesh, loads, BC’s

Base modeling

• The ANSYS Composite

PrepPost allows to define the

composite properties for an

existing surface model.

• The model including mesh,


• The model including mesh,

loads and boundary

conditions can be defined in

ANSYS Mechanical or in

ANSYS Mechanical APDL.

• ANSYS Mechanical provides

a menu to interact with

ANSYS Composite PrepPost.

Laminate modeling

• A hierarchical data description of materials, stackups and laminates

Base information:

Engineering data and material limits

Fabrics

Stackups

Add thickness,

pricing and draping

information

Stack fabrics, add

pricing and draping

information


Laminates

Define final

laminate

product

Material data can be imported from external sources (ESACOMP9)

Defining laminate areas

• Laminates are defined on

zones (element groups), as

well as orientations

• Zones can be applied a pre-

defined laminate


• Additional Laminates can be

constructed by progressive

stacking on zones

• Support for layer drop-off

• Easy generation of solid model

based on shell model

Easy-to-use yet advanced

definition of orientations

• Cartesian, cylindrical and spherical

coordinate systems as basis for

definition of material reference

direction

• Concept of oriented element-sets to

align different material zones


General post-processing

• Arbitrarily configurable

envelope contour failure

plots

• Overlay Text-plots for


• Overlay Text-plots for

easy identification of the

relevant failure-modes

• Generate superposition

load cases based on

initial load cases

Failure Analysis

• ANSYS Composite PrepPost provides a unique

set of failure criteria to analyze the product:

– From simple criteria (max stress) to state-of-

the art analysis (Puck criterion)

– Interlaminar shear, normal stresses for shells

– Through thickness failure for shells

– Combination of failure criteria provides failure


–

envelope

– 3D implementation of main criteria (Tsai-Hill,

Hashin, Puck etc.)

– Ability to create user-defined criteria

• Results can be displayed as:

– Most critical failure criteria

– Critical layer

– Reserve, inversed reserve factors and safety

margin (based on stress limits)

– Standard results (stressesB.) per layer

Draping and flat-wrap

• ANSYS Composite

PrepPost provides draping

functionality to analyze for

drapability as well as for

calculation of the fiber-

angle correction


angle correction

• Further ANSYS Composite

PrepPost can also provide

the flat-wrap of plies with

their distortion

Flat-wrap

Draping

Plybook generation

• A set of plies or

all plies are

selected for ply-

book

generation.


generation.

Additional capabilities

• Python scripting capabilities provide full

automation for the setup of the composite

models.

Automated update of full model following a


• Automated update of full model following a

design change.

Summary

• ANSYS’ bespoke offshore products and

general purpose FEA offer a well proven

solution for structural design in the

renewables and marine sectors

• ANSYS’ composite solutions provide a user-


• ANSYS’ composite solutions provide a user-

friendly and efficient method for the

assessment of complex composite

structures, traditionally a very challenging

area for FEA

Documents

ANSYS structural and offshore solutions for the ... · offshore solutions for the renewablesrenewablesand marine and marine sectors ... rotor dynamics, ... • Offshore Structures