712 超軽量スペースフレーム車体の最適設計

概要

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A formula type racing-car was designed and built for the competition "Formula SAE" organized by the Society of Automotive Engineers. This competition has been successfully operated for giving students hands-on engineering experiences. To win in this competition, weight reduction is one of the most important design targets for dynamic performance and fuel economy in endurance race. Because of the limitations in both development time, manufacturing tools and cost, a space-frame made of steel pipes was chosen as the body structure. For better agility and longitudinal weight distribution, engine was installed in the mid-ship arrangement, To meet the requirements for hauling the vehicle by air cargo, the vehicle should have been easily disassembled into smaller sub-assemblies. Adopting longitudinal engine layout with two bulkheads that were attached to the front and rear end of the engine and joining the space-frame pipes with bolts solved these requirements. Based on this arrangement, the bulkhead weight was reduced using voxel approach and topology optimization. The pipe frame weight was reduced by stretch method based on vibration mode analysis.
社団法人日本機械学会の論文
2002-09-13