Deformation States of the Selected Mechanical Component during the Harmonic Analysis

Spodniak, Miroslav; Semrád, Karol; Hovanec, Michal; Al-Rabeei, Samer; Heško, František

doi:10.1109/ntad51447.2020.9379117

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…In turbo machines, the blades receive a major periodic excitation at a frequency that is equal to the nozzle passing frequency. Given that these forces are periodic, several harmonics must be considered to determine whether resonance takes place and whether these harmonics coincide with any natural frequency of the blade [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Vibration Analysis of Octet-Truss-Lattice-Based Gas Turbine Blades

Hussain

Ghopa

Singh

et al. 2022

Metals

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This paper aims to investigate the utilization of octet truss lattice structures in gas turbine blades to achieve weight reduction and improvement in vibration characteristics, which are desired for turbine blades to improve the efficiency and load capacity of turbines. A solid blade model using NACA 23012 airfoil was designed as reference. Three lattice-based blades were designed and manufactured via additive manufacturing by replacing the internal volume of solid blades with octet truss unit cells of variable strut thickness. Experimental and numerical vibration analyses were performed on the blades to establish their suitability for potential use in turbine blades. A maximum weight reduction of 24.91% was achieved. The natural frequencies of lattice blades were higher than those of solid blades. A stress reduction up to 38.6% and deformation reduction of up to 21.5% compared with solid blades were also observed. Both experimental and numerical results showed good agreement with a maximum difference of 3.94% in natural frequencies. Therefore, apart from being lightweight, octet-truss-lattice-based blades have excellent vibration characteristics and low stress levels, thereby making these blades ideal for enhancing the efficiency and durability of gas turbines.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Vibration Analysis of Octet-Truss-Lattice-Based Gas Turbine Blades

Hussain

Ghopa

Singh

et al. 2022

Metals

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show abstract

“…There are conventional methods for natural frequency estimation, for example, the modal analyses performed by FEM, experimental analyses, and others. However, mentioned analyses have significant requirements on time [ 8 ], one of the approaches is acoustic natural frequency identification. The acoustic method has some advantages, one of which is the price of the essential equipment.…”

Section: Introductionmentioning

confidence: 99%

A novel method for the natural frequency estimation of the jet engine turbine blades based on its dimensions

Spodniak,

Hovanec,

Korba

2024

Heliyon

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Deformation States of the Selected Mechanical Component during the Harmonic Analysis

Cited by 2 publications

References 8 publications

Experimental and Numerical Vibration Analysis of Octet-Truss-Lattice-Based Gas Turbine Blades

Experimental and Numerical Vibration Analysis of Octet-Truss-Lattice-Based Gas Turbine Blades

A novel method for the natural frequency estimation of the jet engine turbine blades based on its dimensions

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