RDM® process tool automates casting reinforcing rib patterns for quantum seating armrest designs

Written by: GRM Consulting Ltd | Published:

When developing casting designs to meet multiple loading requirements, the design of efficient rib patterns is key to achieving minimum mass and cost solutions. For the development of a new rail seat design for Hitachi Rail Europe, Quantum Seating Ltd utilised the Reinforcement Derivation Method (RDM) tool developed by UK software company, GRM.

Tasked to deliver a carriage of new generation, lightweight seat designs for Hitachi Rail Europe, Quantum Seating Ltd were presented with a 7 month design and prototype timeframe and aggressive mass targets. In order to achieve the targets for mass and project completion, Quantum turned to UK based FEA software provider GRM. GRM are developers and providers of structural optimisation tools, including their design guidance tool, RDM.

The Reinforcement Derivation Method provides an automated and efficient process for identifying areas to focus development efforts in order to achieve maximum benefit. One feature of the RDM toolset is the automatic definition of optimised casting and moulding rib patterns to meet a component's structural loading requirements. Additionally, RDM can be used for:

• Idealised Load Path Identification
• Identification of Poor Joint Conditions
• Areas to improve assembly connectivity (eg Spotwelding)

Quantum applied the rib pattern development on all cast parts in the train seat design with great success, with the RDM tool delivering optimum casting designs back to their SolidWorks design environment. The completed seat design was delivered to the target mass defined by Hitachi within the timings set. Further information on the RDM tool and GRM can be found at www.grm-consulting.co.uk

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