GRM has over a decade of experience within the rail industry, from design and development to the engineering analysis of rail structures. One of our first projects was the development of a composite rail coach roof in 2000. From this we expanded into front end structures and more recently have delivered the latest generation of crash-safe rail seats and tables.
GRM has assisted in the development of front end structures to EN15227, creating sub-models of energy absorbing components and calibrating these to laboratory tests. Following these studies, our work expanded to cover modelling of complete rail vehicle fronts as allowed by the standard. We draw upon our depth of experience in impact modelling to deliver high quality models, able to be approved by thorough inspection.
Our work in the development of body systems also covers the loadings from seats, tables, as well as the stiffness studies from component through sub-system to complete body level.
To date, GRM's team has developed three seats for the latest generation of new bodies and refurbishment. Our recent train seat projects have met the most up-to-date safety regulations, leading GRM to develop and test the first train seat able to meet all of the new legislation, over a year quicker than the competition. GRM were able to do this due to our extensive experience in crash testing, simulation and using our intimate knowledge of optimisation software. GRM's involvement with seat development projects not only delivered a seat which met all of the GM/RT 2100 requirements, but also gave a weight saving of 25-30% per seat, assisting with the need across all industries to lower weight and production costs. This mass saving contributes to lower running costs, or in some instances the ability to improve specifications with extra capabilities such as air conditioning.
One of the more challenging areas of simulation in a rail environment is impact of objects at high speed into the front of the cab. GRM has conducted modelling of this loading to the various standards that are present such as FRA 49 CFR Part 223. Studies at high strain rate have shown the relative benefits of different types of materials and the design requirements around brackets and windows. Impact requirements produce specified loadings, which with understanding can be combined with fatigue and durability requirements inside an optimisation design-space to produce efficient lightweight designs which meet multiple requirements.
GRM has supported many clients in the development of bogie components and sub-systems for the unique durability requirements present in a rail environment. Our support has enabled products to reach the market quicker as well as helping to minimise rework costs and extend life.