We needed to assist in the change of a handrail design for an MV70 train. A new concept had been designed, and the new proposed rail had to meet safety requirements.
To replace the current handrail with a new concept that has minimal parts and fixation
Perform the FEA to ensure the deflection and stress meet the design requirements
Carry out bolt assessments through calculations, using COBRA software
On assessment, our team realised the initial designs did not meet all criteria set out in the design stage.
We added additional brackets to meet the design requirements.
At bracket location, we decided the bolt size should increase from M8 to M10.
The FEA was then carried out to ensure that the handrail can withstand loads acting upon it.
The proposed new design to reduce the number of parts and fixation for ease of production was, in the end, fully verified using FEA.
Design changes proposed to meet the design criteria meant that:
Added additional brackets in left handrail reduced stresses
Bolt size was increase by M8 to M10 to create a better solution
Likewise, the bracket plate thickness was optimised by 1mm
The handrail was thickened by 1mm, ensuring a better and safer design overall
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Quest Global brings deep industry knowledge and digital expertise to deliver E2E global product engineering services. We bring together technologies and industries alongside the contributions of diverse individuals and their areas of expertise to solve problems better, faster. This multi-dimensional approach enables us to solve the most important and large-scale challenges across the Aerospace & Defense, Automotive, Energy, Hi-Tech, Healthcare, Medical Devices, Rail and Semiconductor industries.