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

Haryanto, Ismoyo; Raharjo, Fuad Arief; Kurdi, Ojo; Haryadi, Gunawan Dwi; Santosa, Sigit Puji; Gunawan, Leonardo

doi:10.31427/ijstt.2018.1.1.2

Cited by 12 publications

(5 citation statements)

References 6 publications

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“…ASO is a based on Adaptive Nonlinear Programming by Quadratic Lagrangian (A-NLPQL) algorithm in a Direct Optimization system [46][47][48].…”

Section: Adaptive Single-objective Optimizationmentioning

confidence: 99%

Methods of Partial Differential Equation Discovery: Application to Experimental Data on Heat Transfer Problem

Andreeva,

Bykov,

Gataulin

et al. 2023

Processes

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The paper presents two effective methods for discovering process models in the form of partial differential equations based on an evolutionary algorithm and an algorithm for the best subset selection. The methods are designed to work with sparse and noisy data and implement various numerical differentiation techniques, including piecewise local approximation using multidimensional polynomial functions, neural network approximation, and an additional algorithm for selecting differentiation steps. To verify the algorithms, the experiment is carried out on pulsed heating of a viscous liquid (glycerol) by a submerged horizontal cylindrical heat source. Temperature measurements are taken only at six points, which makes the data very sparse. The noise level ranges from 0.2 to 1% of the observed maximum temperature. The algorithms can successfully restore the structure of the heat transfer equation in cylindrical coordinates and determine the thermal diffusivity coefficient with an error of 2.5–20%, depending on the algorithm type and heating mode. Additional synthetic setups are employed to analyze the dependence of accuracy on the noise level. Results also demonstrate the algorithms’ ability to identify underlying processes such as convective motion.

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“…ASO is a based on Adaptive Nonlinear Programming by Quadratic Lagrangian (A-NLPQL) algorithm in a Direct Optimization system [46][47][48].…”

Section: Adaptive Single-objective Optimizationmentioning

confidence: 99%

Methods of Partial Differential Equation Discovery: Application to Experimental Data on Heat Transfer Problem

Andreeva,

Bykov,

Gataulin

et al. 2023

Processes

View full text Add to dashboard Cite

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“…Second, it eliminates the number of design points required for the optimization. Third, the failed design points are regarded as inequality constraints that make it fault-tolerant [12]. In this model, 1000 design points were utilized to find ten candidate points that achieve the optimization goal.…”

Section: Amme-20mentioning

confidence: 99%

Design and optimization of a missile transporter semi-trailer structure

Ibrahim

Ali

Kamel

2022

J. Phys.: Conf. Ser.

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Minimizing weight, maximizing strength, and maximizing stiffness are the three main challenges of designing semi-trailer structures. This paper presents the design and optimization process of a lightweight missile transporter semi-trailer chassis. The semi-trailer supports up to 40 tons of payload. The payload consists of three generic missiles with a standard length up to 12.5 m. The stacking of these missiles up-shifted the overall center of gravity. The high center of gravity endangered the safe maneuvering of the semi-trailer. The design process went through several iterations to meet the functional and installation requirements of the payload. A finite element model simulated the structure with respect to the loading conditions. Then, the model was implemented to formulate an optimization problem. The optimization objectives were to minimize the chassis weight and constrain the stress to an acceptable value at the same time while safely supporting the payload. The optimization problem solution successfully achieved a balanced trade-off between structural weight, stiffness, and rigidity. The new optimized design is approximately 12.6% lighter and 10.1% stiffer than the initial design for bending loads.

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“…Kurdi et al (10) studied vibrational aspects of an electric bus chassis under different loading conditions arising from the road roughness, engine, and transmission components using FEM and an optimized bus chassis was proposed as a result. Furthermore, Haryanto et al (11) optimized the structure of a bus body frame to minimize its weight through constraint of the natural frequency. Using the adaptive single-objective method, the bus weight was reduced by about 8% without changing its dynamic characteristics.…”

Section: Literature Reviewmentioning

confidence: 99%

Dynamic Modal Analysis of a Passenger Bus: Theoretical and Numerical Studies

Lopes

Farahani

Melo

et al. 2021

Transportation Research Record

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The dynamic assessment of a passenger bus is of the highest importance when aiming at high safety standards and low emissions for environmental sustainability. This work studies the dynamic response of a bus considering its modal analysis, for which simple dynamic models were developed for fast determination of the lowest frequencies, mainly arising from the suspension flexibility. In addition, complex natural vibration modes, impossible to determine using simplified models, were calculated via finite element method (FEM) modeling. To study the tire elastic behavior, as the key link between the vehicle and the road, specific deformation models, leading to a stiffness matrix to be combined with that of the vehicle spring suspension at each wheel/axis, were developed. This study aims at proposing a set of mathematical formulations to describe the modal behavior of passenger buses in detail, which could be applicable in any other long vehicle with similar conditions. Two main factors are studied, namely the suspension and the tire deformation effect. An acceptable agreement was verified between the simplified approach and FEM model results for the evaluation of natural frequencies and associated modes.

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

Cited by 12 publications

References 6 publications

Methods of Partial Differential Equation Discovery: Application to Experimental Data on Heat Transfer Problem

Methods of Partial Differential Equation Discovery: Application to Experimental Data on Heat Transfer Problem

Design and optimization of a missile transporter semi-trailer structure

Dynamic Modal Analysis of a Passenger Bus: Theoretical and Numerical Studies

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