ANALISIS STRUKTUR HOLLOW AXLE KERETA CEPAT EMU CR400AF MENGGUNAKAN ANSYS WORKBENCH

MAHENDRA, TITO SYAHRIL SOBARUDIN IZHA (2024) ANALISIS STRUKTUR HOLLOW AXLE KERETA CEPAT EMU CR400AF MENGGUNAKAN ANSYS WORKBENCH. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

One of the important components in a train is the wheel axle part whose main function is to distribute the load on the train body to the wheels towards the rails. On conventional trains, train wheel axles still often have material failures in the form of cracks and even breaks. The wheel shaft used by conventional trains is a solid shaft while the one used in the fast train uses a hollow axle so that the risk is greater. To confirm and confirm the strength of the hollow axle structure, it is necessary to analyze the structure of the hollow axle when receiving static loading due to the load of the train body. The parameters measured are maximum stress, safety of factor and maximum deformation. The analysis process is carried out using manual theoretical calculations and simulations with finite element methods using ANSYS Workbench software. In the theoretical calculation, the maximum stress value is 59.72 MPa and the safety factor value is 8.87, and the simulation results get a maximum stress of 62.02 MPa, a safety factor value of 8.54 and the maximum deformation that occurs is only 0.086mm. The difference from the theoretical calculation and simulation of the maximum stress and safety of factor was 3.70% and 3.72%. Based on the results obtained, it can be concluded that the hollow axel is safe because the maximum stress < the material allowable voltage and the safety of factor (SF) value < the material standard value of 4,5. Salah satu komponen penting pada kereta api adalah bagian poros roda yang fungsi utamanya untuk mendistribusikan pembebanan dari berat badan kereta ke roda menuju rel. Pada kereta konvensional poros roda kereta masih sering terjadi kegagalan material berupa Crack/retakan dan bahkan terjadi patah. Poros roda yang dipakai kereta konvensional adalah poros berjenis pejal sementara yang digunakan pada kereta cepat menggunakan jenis poros berongga (hollow Axle) sehingga resiko yang dihasilkan lebih besar. Untuk memastikan dan mengkonfirmasi kekuatan struktur hollow axle, maka perlu dilakukan analisis struktur dari hollow axle tersebut ketika menerima pembebanan statis akibat beban bodi kereta. Parameter yang diukur adalah tegangan maksimum, safety of factor dan deformasi maksimumnya. Proses analisis dilakukan menggunakan perhitungan teoritis secara manual dan simulasi dengan metode elemen hingga menggunakan software ANSYS Workbench. Pada perhitungan teoritis didapat nilai tegangan maksimum sebesar 59,72 MPa dan nilai safety of factor 8,87 dan hasil simulasi mendapatkan tegangan maksimum sebesar 62,02 MPa, nilai safety of factor 8,54 dan deformasi maksimum yang terjadi hanya 0,086mm. Selisih dari perhitungan teoritis dan simulasi tegangan maksimum dan safety of factor adalah 3,70% dan 3,72%. Berdasarkan hasil yang didapatkan dapat disimpulkan bahwa hollow axel aman karena tegangan maksimum < tegangan izin material dan nilai safety of factor (SF) < nilai standar material yaitu 4,5.

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