PERANCANGAN ULANG DAN SIMULASI TABRAK DEPAN DAN SAMPING RANGKA MOBIL LISTRIK SINGLE SEATER BIMA SENA 3

The FSAE Japan event has attracted many university electric car teams in Indonesia, one of which is the electric car team from the University of Muhammadiyah Yogyakarta, which is named Kyai Haji Ahmad Dahlan Racing Team. KHAD Racing Team UMY has made 2 formula-style electric cars named Bima Sena but the frame does not meet FSAE regulations and the front and side frame structures are not strong enough to withstand collisions from the front and sides. So that a redesign is needed that aims to obtain a frame with structural and material configurations that are in accordance with FSAE regulations and are strong in resisting impacts from the front and sides. In the design of the framework of the Bima Sena 3 using the optimal design method. The proposed design refers to the 2021 FSAE regulation. In modeling the frame using Autodesk Inventor Professional 2021 software. After being modeled, then a static loading simulation of vertical bending, torsional, front impact, and side impact is carried out using the Finite Element Analysis (FEA) method.. The frame of the Bima Sena 3 is a tubular-space frame designed according to the 2021 FSAE standard with STKM 12B material with an outer diameter of 26.9 and a thickness of 2mm. The Bima Sena 3 frame has a length of 2200 mm, a width of 580 mm and a height of 1100 mm which is joined by welding. Minimum wheelbase 1540 mm with a weight of 50 kg. The Bima Sena 3 frame has a torsional stiffness of 6650 Nm/deg with a safety factor of 1.23. The Bima Sena 3 frame is equipped with an impact attenuator using aluminum honeycomb -5052-3.4 with dimensions of 255 mm long, 220 mm wide, and 220 mm high which can predictably absorb 9715 Joules of energy. The simulation results of the front impact have a deflection of 0.9647 mm and the side impact has a deflection of 0.0309 mm. Deformation that occurs in the frame is predicted not to injure the driver's legs or body.