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original research article

Optimization of Bus Body Frame Structure for Weight Minimizing with Constraint of Natural Frequency using Adaptive Single-Objective Method

Ismoyo Haryanto 1 * , Fuad Arief Raharjo 1 , Ojo Kurdi 1 , 2 , Gunawan Dwi Haryadi 1 , 2 , Sigit Puji Santosa 2 , 3 , Leonardo Gunawan 2 , 3

1Department of Mechanical Engineering, Faculty of Engineering, University of Diponegoro, Semarang, Indonesia

2National Center for Sustainable Transportation Technology, Indonesia

3Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Indonesia

*Email: ismoyo_h@undip.ac.id

The objective of this work is to analyze and optimize a bus frame structure using Finite Element Method in dynamic conditions. The bus body geometry was obtained directly from the three-dimensional Computer-Aided Design files. The optimization was conducted to determine the minimum weight of the bus frame structure without violating the specified natural frequency constraints. The design variable is the thickness of the bus body frame. In present study, Adaptive Single Objective method was chosen as an optimizer method. The results show that the structural weight of the bus frame can be reduced about 8% without changing its dynamic characteristic.

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