Bentley Engineering Software for Offshore Projects: SACS, MOSES, STAAD.Pro & MAXSURF
Bentley Engineering Software for Offshore Projects: SACS, MOSES, STAAD.Pro & MAXSURF
Offshore engineering projects require a combination of structural analysis, marine engineering, hydrodynamic assessment, stability calculations, and advanced design verification. From fixed offshore platforms and jacket structures to floating vessels and marine systems, engineers need specialized software to evaluate complex loading conditions and ensure that structures perform safely throughout their service life.
Bentley Systems provides a range of engineering software solutions that support different stages of offshore and marine engineering workflows. Among the most commonly used tools are SACS, MOSES, STAAD.Pro, and MAXSURF.
Although these software packages have overlapping capabilities in some areas, each has a different engineering focus. Selecting the right tool depends on the type of structure, analysis required, project phase, and applicable design standards.
This guide explains the applications of SACS, MOSES, STAAD.Pro, and MAXSURF in offshore and marine engineering and how they can fit into an integrated engineering workflow.
What Is Bentley Engineering Software?
Bentley Systems develops engineering software used across infrastructure, structural, geotechnical, transportation, water, energy, and industrial projects.
For offshore and marine applications, Bentley’s engineering software portfolio can support activities such as:
Structural analysis and design
Offshore platform analysis
Jacket and topside analysis
Marine stability assessment
Hydrodynamic analysis
Vessel design
Structural strength assessment
Dynamic analysis
Fatigue assessment
Load generation and environmental loading
Transportation and installation engineering
The key advantage of using specialized engineering software is that offshore structures can be evaluated under realistic combinations of environmental, operational, transportation, and accidental loads.
Why Is Specialized Software Important for Offshore Projects?
Offshore structures operate in demanding environments. Wind, waves, currents, tides, vessel motions, equipment loads, operational loads, and accidental conditions can all influence structural performance.
A typical offshore project may require engineers to consider:
Wave loading
Wind loading
Current loading
Gravity and equipment loads
Seismic loads
Vessel impact
Transportation loads
Installation loads
Fatigue
Structural nonlinearities
Dynamic response
Hydrostatic stability
Hydrodynamic behavior
A single software package may not be the most suitable solution for every part of this workflow.
This is why offshore engineering teams often use multiple specialized tools, with each application addressing a particular engineering requirement.
1. SACS for Offshore Structural Engineering
SACS is widely associated with offshore structural analysis and design, particularly for fixed offshore structures.
It can be used for the analysis and design of structures such as:
Fixed offshore platforms
Jacket structures
Topsides
Deck structures
Piles and foundation systems
Offshore modules
Brownfield modifications
Existing platform assessments
SACS provides capabilities for analyzing offshore structures subjected to environmental and operational loading conditions.
SACS for Jacket Structure Analysis
Jacket structures are exposed to significant environmental forces from waves and currents. Their structural configuration also creates complex load paths through tubular members, joints, braces, and piles.
Engineers can use SACS to evaluate:
Member forces
Joint behavior
Structural utilization
Foundation response
Environmental loading
Load combinations
Structural strength
Fatigue performance
This makes SACS particularly useful for the engineering assessment of offshore fixed structures.
SACS for Fatigue Analysis
Fatigue is an important consideration for offshore structures because many components are subjected to repeated cyclic loading throughout their operational life.
Fatigue assessments can help engineers identify:
Critical structural members
High-stress locations
Critical joints
Fatigue-sensitive details
Remaining fatigue life
Fatigue analysis becomes especially important during offshore asset life-extension studies, modifications, and integrity assessments.
SACS for Existing Offshore Platforms
Offshore platforms may remain in service for decades. During their operational life, equipment changes, additional loads, corrosion, modifications, and environmental conditions can alter the original design assumptions.
Engineering analysis may therefore be required to determine whether an existing structure can safely accommodate:
New equipment
Additional topside loads
Platform modifications
Operational changes
Life-extension requirements
Strengthening measures
SACS can form part of the engineering workflow used for these assessments.
2. MOSES for Offshore and Marine Engineering
MOSES is used extensively for marine and offshore engineering applications involving floating structures, vessels, hydrodynamics, stability, and offshore operations.
Compared with SACS, which is strongly associated with structural analysis of fixed offshore structures, MOSES is particularly useful when marine behavior, hydrodynamics, stability, and offshore operations are central to the engineering problem.
Typical applications include:
Marine transportation
Offshore installation
Vessel stability
Float-over operations
Heavy lifting
Launching and upending
Loadout analysis
Hydrodynamic analysis
Floating structures
Transportation engineering
MOSES for Hydrodynamic Analysis
Offshore vessels and floating structures respond dynamically to waves.
Hydrodynamic analysis helps engineers understand how a structure behaves when subjected to environmental excitation.
Depending on the engineering problem, assessments may involve:
Wave conditions
Vessel motions
Hydrodynamic coefficients
Added mass
Damping
Wave excitation
Response amplitudes
Stability
This information can support transportation, installation, and operational studies.
MOSES for Offshore Transportation
Large offshore structures are frequently transported by barges or specialized vessels.
Transportation engineering may need to consider:
Vessel motions
Cargo stability
Environmental conditions
Accelerations
Lashing arrangements
Structural loads
Seafastening
Route conditions
MOSES can be incorporated into transportation engineering workflows to assess the behavior of marine systems under environmental loading.
MOSES for Offshore Installation
Offshore installation operations can involve complex stages such as:
Loadout
Transportation
Ballasting
Positioning
Lifting
Launching
Upending
Installation
Each stage may create different load cases and operational constraints.
Marine engineering software can help engineers evaluate these stages before offshore execution.
3. STAAD.Pro for Structural Analysis and Design
STAAD.Pro is a general-purpose structural analysis and design software widely used for building and industrial structures.
While it is not exclusively an offshore engineering application, it can be useful in offshore projects for analyzing structural components and supporting facilities.
Potential applications include:
Structural framing
Industrial structures
Buildings
Pipe racks
Platforms
Equipment support structures
Access structures
Onshore facilities
Supporting steelwork
STAAD.Pro in Offshore Project Workflows
Large offshore projects frequently include both offshore and onshore components.
For example, an energy project may include:
Offshore platforms
Onshore processing facilities
Pipe racks
Utility structures
Equipment support frames
Buildings
Temporary structures
STAAD.Pro can be useful for structural analysis and design of suitable components within these broader project environments.
Engineers can perform structural analysis under applicable loading conditions and evaluate member forces, displacements, and design requirements.
STAAD.Pro vs SACS
A common question is whether engineers should use STAAD.Pro or SACS for offshore structural projects.
The answer depends on the engineering requirement.
SACS is specifically oriented toward offshore structural engineering and is commonly used for fixed offshore platforms, jackets, piles, environmental loading, and offshore-specific assessments.
STAAD.Pro is a broader structural analysis and design platform applicable to many types of structures.
Therefore, the choice should be based on:
Structure type
Project requirements
Analysis methodology
Applicable standards
Required offshore-specific capabilities
Client specifications
Engineering workflow
In some projects, both tools may be used for different structural components or stages of the engineering process.
4. MAXSURF for Ship and Marine Design
MAXSURF is a suite of tools focused on marine and vessel design.
It can support different stages of vessel development, including:
Hull modeling
Vessel design
Hydrostatics
Stability
Resistance prediction
Seakeeping
Structural design
Marine engineering analysis
MAXSURF is therefore particularly relevant to ship design and marine engineering applications.
MAXSURF for Hull Design
The hull form has a major influence on vessel performance.
Engineers and naval architects may evaluate parameters such as:
Hull geometry
Displacement
Draft
Trim
Hydrostatic properties
Stability characteristics
A digital hull model allows different design alternatives to be evaluated before fabrication.
MAXSURF for Stability Analysis
Stability is a fundamental consideration in vessel design.
Engineers may need to assess vessel behavior under different loading conditions, including changes in:
Cargo
Ballast
Fuel
Consumables
Equipment
Draft
Center of gravity
Stability analysis helps determine whether a vessel satisfies the required stability criteria for its intended operation.
SACS vs MOSES vs STAAD.Pro vs MAXSURF
The four software solutions address different engineering requirements.
| Software | Primary Focus | Typical Applications |
|---|---|---|
| SACS | Offshore structural engineering | Jackets, fixed platforms, topsides, piles, fatigue |
| MOSES | Marine/offshore analysis | Hydrodynamics, transportation, installation, stability |
| STAAD.Pro | General structural analysis | Steel structures, industrial structures, platforms, pipe racks |
| MAXSURF | Marine and vessel design | Hull design, hydrostatics, stability, resistance, seakeeping |
The tools should not necessarily be viewed as direct competitors. In many engineering workflows, they can complement one another.
How These Software Tools Can Work Together
An offshore engineering project may involve multiple software applications because different engineering disciplines require different analytical approaches.
For example, consider an offshore development involving a fixed platform and marine transportation.
A simplified workflow could look like this:
Concept & Marine Design → Structural Modeling → Environmental Loading → Structural Analysis → Hydrodynamic/Marine Analysis → Transportation & Installation → Design Verification
Different tools can contribute at different stages.
SACS
Used for offshore structural analysis and design of the fixed platform.
MOSES
Used for relevant marine, hydrodynamic, transportation, or installation studies.
STAAD.Pro
Used where general structural analysis and design capabilities are appropriate.
MAXSURF
Used primarily for vessel and marine design, hydrostatics, stability, and related naval architecture applications.
The actual workflow depends on project requirements, engineering standards, client specifications, and the scope of analysis.
Key Factors When Selecting Offshore Engineering Software
Choosing engineering software should not be based only on popularity. Engineers should consider the requirements of the specific project.
Important factors include:
1. Type of Structure
Is the project a fixed platform, floating structure, vessel, jacket, topside, or industrial facility?
2. Required Analysis
Does the project require:
Static analysis?
Dynamic analysis?
Fatigue assessment?
Hydrodynamic analysis?
Stability analysis?
Transportation analysis?
Installation analysis?
3. Design Standards
Offshore projects may need to comply with applicable international standards, recommended practices, and client-specific requirements.
4. Project Deliverables
The software should support the calculations, reports, models, drawings, and engineering documentation required by the project.
5. Integration With Other Tools
Large engineering projects rarely rely on one software package. Data exchange and compatibility with other engineering tools can therefore be important.
6. Engineering Expertise
Software is only one part of the engineering process. Engineers need appropriate knowledge of structural mechanics, hydrodynamics, marine operations, design standards, and numerical modeling to produce reliable results.
Common Applications of Bentley Software in Offshore Engineering
Bentley engineering software can support a broad range of offshore and marine activities.
Some examples include:
Offshore platform structural analysis
Jacket analysis
Topsides analysis
Pile and foundation assessment
Fatigue analysis
Offshore modification studies
Structural integrity assessment
Marine transportation
Heavy lift engineering
Offshore installation analysis
Vessel design
Hydrostatic analysis
Stability assessment
Hydrodynamic studies
Industrial structural analysis
Why Engineering Expertise Matters Alongside Software
Engineering software can perform sophisticated numerical calculations, but the quality of the result depends heavily on how the engineering problem is defined.
Incorrect assumptions about:
Boundary conditions
Loads
Material properties
Structural connections
Environmental conditions
Mesh or model quality
Load combinations
Design criteria
can produce misleading results even when the software itself is functioning correctly.
For this reason, offshore engineering analysis should combine appropriate software, sound engineering methodology, applicable standards, and experienced engineering judgment.
Bentley Software Training for Offshore Engineers
Engineers working in offshore and marine industries can benefit from structured training in engineering software.
Training can help professionals understand not only how to operate the software but also how to apply it to practical engineering problems.
A useful training program may cover:
Software interface and modeling
Model creation
Load definition
Boundary conditions
Analysis setup
Results interpretation
Design checks
Engineering workflows
Practical project examples
For engineers, the ability to interpret and validate analysis results is just as important as knowing which buttons to click.
Conclusion
SACS, MOSES, STAAD.Pro, and MAXSURF serve different purposes within the broader offshore and marine engineering ecosystem.
SACS is strongly suited to offshore structural analysis and design, particularly for fixed offshore structures. MOSES supports marine and offshore engineering problems involving hydrodynamics, transportation, stability, and installation. STAAD.Pro provides broad structural analysis and design capabilities for many types of structures. MAXSURF focuses on vessel and marine design, including hull modeling, hydrostatics, stability, and related analyses.
Rather than asking which software is universally “best,” offshore engineers should identify the engineering problem first and then select the software that provides the appropriate analytical capabilities.
For complex offshore projects, an integrated engineering workflow—supported by qualified engineers, appropriate standards, validated models, and specialized software—can help deliver reliable and technically sound engineering solutions.
Frequently Asked Questions
Is SACS used for offshore platform design?
Yes. SACS is widely used for offshore structural analysis and design, particularly for fixed offshore structures such as jackets, topsides, and associated structural systems.
What is MOSES software used for?
MOSES is used for a range of marine and offshore engineering applications, including hydrodynamic analysis, stability, transportation, installation, and other marine operations.
Can STAAD.Pro be used for offshore structures?
STAAD.Pro can be used for many structural analysis and design applications associated with offshore and industrial projects. However, the suitability of the software depends on the specific structure, analysis requirements, standards, and client specifications.
What is MAXSURF used for?
MAXSURF is a marine design and analysis software suite used for applications such as hull modeling, hydrostatics, stability, resistance prediction, seakeeping, and other vessel-design activities.
Which Bentley software should an offshore engineer learn?
The appropriate software depends on an engineer’s specialization. Structural engineers may work with SACS or STAAD.Pro, while marine and naval architecture professionals may work with MOSES or MAXSURF. Engineers working across disciplines may benefit from understanding multiple tools and how they fit into an integrated engineering workflow.
Can these software tools be used together?
Yes. Depending on the project, different Bentley applications can form part of a broader engineering workflow, with each tool being used for the analysis or design tasks for which it is most appropriate.
