Projects

Design by assessment for
thrust testing assemblies

 
 

Industry

Submarine Equipment Design & Manufacture

Services

FEA, Design by analysis

Location

UK

 
 

DOCAN have worked to provide design and analysis services to a client who produces pressure systems equipment.

The client required a jet thrust testing system to be designed which would be retrofit into a standard size ISO container, which would form part of the load bearing structure.

 
 

The challenge

The large forces produced by the jet thrust system required a strong frame design to protect the sensitive system components, whilst giving the client flexibility to change the configuration of the test equipment to accommodate different test parameters. Part of DOCAN’s scope of work was to provide marked up engineering drawings for manufacture and to verify the capacity of the containers lifting points for transportation purposes, with the much heavier test system installed.

1sketch
 
 
 
 
 

The DOCAN solution

We approached this project from first principles, using a combination of manual calculations and beam element FEA modeling in MSC MARC to size the main structural members, following EC3 design rules. This allows for several design iterations to be quickly explored. More detailed shell and solid element FEA modelling was then used to assess the detailed locations of the design. As part of the project, DOCAN’s engineers developed an innovative bolting arrangement which could be used to quickly change the configuration of the equipment to suit the client’s needs.

Due to the different aspects of the testing system, we performed the assessment using Eurocode, DNV and ASME Piping design codes to show the components were suitable to carry the massive thrust loads which would be applied during use.

 
 

Project Summary

ItemApplicationDOCAN design expertiseAssessment of fabricated structuresSolidworksFEAPipe StressMAPLE
Proficiency in use of engineering standardsASME B31.3
ASME II PART D
ASME VIII Div. 2
EC3 Eurocode
DNV 2.7-1
Equipment designTest rig
Jet thrust loading
DNV ISO container
Fabricated structures
Pressure systems
Piping
CAD geometry3D solid and 2D surface geometry
Line modelling
FEASolid / Shell / Beam modelling
Parametric scripting
Bolted connection assessment
Pipe Stress
Engineering calculationsStress Linearization (DSET)
Stress & tmin calcs
True stress-strain curve calculation
 
 

The Outcome

DOCAN delivered a design of a safe, cost effective system which met the client’s requirements. We also delivered a detailed drawing pack, giving the client advice on manufacture of components and construction of the welded and bolted assembly.

Bolt3