On the vibration transfer path analysis of aero-engines using bond graph theory

Mir-Haidari, Seyed Ehsan; Behdinan, Kamran

doi:10.1016/j.ast.2019.105516

Cited by 16 publications

(4 citation statements)

References 35 publications

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“…Operational Transfer Path Analysis (OTPA) 26,27 is a technique used to identify and evaluate the contribution of different components and subsystems to the overall noise and vibration level of a system. It works by measuring the transfer of energy within the system and analyzing the data to determine the sources and pathways of noise and vibration.…”

Section: Operational Transfer Path Analysis Of Multi-rotor Passenger ...mentioning

confidence: 99%

An investigation on the structural vibrations of multi-rotor passenger drones

Chen,

Meng,

Wang

et al. 2023

International Journal of Micro Air Vehicles

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In order to solve the structural damage problem of the first generation of large multi-rotor manned drones, the present work has designed to study the structural vibration problems of multi-rotor drones. On a small multi-rotor drone, the laser vibration meter verified the reliability of acceleration sensor measurement of vibration and found that circular shape carbon fiber arms have strong damping abilities, with the strongest vibration in the Z-axis direction. To improve the design of the second generation of large multi-rotor manned drones, elliptical shape carbon fiber arms were employed instead of circular arms. Experiments showed that the main vibrations of the large multi-rotor manned drone’s arm are low-frequency vibrations below 200Hz, producing mainly torsional and bending modes, and the elliptical carbon fiber arms significantly reduce vibrations in the Z-axis direction. This study provides experimental data support for multi-rotor manned drones and further presents an improvement strategy for suppressing the vibrations of the multi-rotor manned drones.

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Section: Operational Transfer Path Analysis Of Multi-rotor Passenger ...mentioning

confidence: 99%

An investigation on the structural vibrations of multi-rotor passenger drones

Chen,

Meng,

Wang

et al. 2023

International Journal of Micro Air Vehicles

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“…Structural vibrations are the main reason for noise problems in aerospace and high-speed rail. 16 It works as a vibration absorber when porous material is filled between panels, and the vibration of panels is damped out before it reaches a steady state. 17 Gulia et al 18 found that a composite structure consisting of two panels and sonic crystals filled with glass fiber had superior sound transmission loss (STL) than sonic crystal sandwich panels.…”

Section: Introductionmentioning

confidence: 99%

“…In general, filling materials in honeycomb can further optimize the acoustic properties of honeycomb sandwich structures. Structural vibrations are the main reason for noise problems in aerospace and high‐speed rail 16 . It works as a vibration absorber when porous material is filled between panels, and the vibration of panels is damped out before it reaches a steady state 17 .…”

Section: Introductionmentioning

confidence: 99%

Preparation and sound insulation of honeycomb composite structures filled with glass fiber

Ge,

Xue,

Liu

et al. 2023

Polymer Composites

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Honeycomb composite with excellent mechanical–physical properties had attracted extensive attention. To achieve outstanding sound insulation while maximizing the high‐performance of honeycomb composite, this article reported a honeycomb composite structure filled with glass fiber (HFG) based on a paper‐making process and the corresponding sandwich structure. Pulping parameters, mechanical property, air permeability and sound insulation of HFG were analyzed. The results showed that the hanging index and settling height of glass fiber slurry were inversely proportional to the beating degree, which was beneficial for reducing the coefficient of variation (CV) of HFG with value of 4%–6%. The maximum improvement in tensile strength and bursting strength of HFG were 70% and 53%, respectively. In addition, sound transmission loss (STL) of HFG was proportional to cell size, density, filling amount and thickness of the honeycomb. Compared to HFG, sandwich structure consisting of HFG and glass fiber/hot melt fiber panels effectively improved STL, especially at low‐mid frequencies. It was also found that designing holes on the surface of sandwich structure could further improve STL in certain frequency bands. The structure offered a lightweight and high‐performance response for construction, transportation and infrastructure.Highlights This article designs a new type of honeycomb filled glass fiber via paper‐making process, aiming to improve the comprehensive performance of honeycomb. By the design of embedded structure, the maximum improvement in tensile strength and bursting strength of honeycomb were 70% and 53%, respectively. By designing perforated, embedded and laminated structures, sound insulation has been improved, while reducing material quality.

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“…A wind turbine gearbox was modeled in [16] using the BG method, to develop a framework for transmission chain modeling, and the parameters were synthesized in Monte Carlo simulations. The transmission path of vibrations in aero-engines was analyzed in [17] using the BG theory methods, to efficiently diagnose and minimize noise and vibration in the design stage. Tan [18] discussed the effects of stiffness, damping, and inertia on the dynamic response of gear trains, based on the bond graph method.…”

Section: Introductionmentioning

confidence: 99%

Bond Graph-Based Approach to Modeling Variable-Speed Gearboxes with Multi-Type Clutches

Yan

Liu

et al. 2022

Applied Sciences

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The modeling and simulation of gearboxes is important for analyzing the dynamic characteristics and designing control strategies of transmission systems. Variable-speed gearboxes include compound planetary gear trains and clutches, which complicates dynamic modeling. Here, a procedural bond graph-based modeling method that considers many uncertainties is proposed. The proposed method yields a constant system–structure model. First, bond graph models of the two most common planetary gears were summarized, and were used as sub-models of a compound planetary gear train. Then, the Karnopp friction sub-model of the friction clutch and a relative angular displacement sub-model of the one-way clutch were constructed. Based on the dynamic coupling between the sub-models, the modeling steps of the gearbox, including the compound planetary gear train friction clutch one-way clutch coupling system, are described in detail. Next, the main sources of uncertainties of gearbox were analyzed and the simulation methods were given. Finally, the novel uncertain bond graph model was used to simulate the double planetary gearbox; the transmission ratio before and after the shift was 2.42 and 1.72, compared with the design values of 2.41 and 1.71, respectively; the deviation is within 5.8%; The average rotating speeds of the output shaft fluctuated by 6 and 2.5% respectively, which was within a reasonable range, so the effectiveness of the method is verified.

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On the vibration transfer path analysis of aero-engines using bond graph theory

Cited by 16 publications

References 35 publications

An investigation on the structural vibrations of multi-rotor passenger drones

An investigation on the structural vibrations of multi-rotor passenger drones

Preparation and sound insulation of honeycomb composite structures filled with glass fiber

Bond Graph-Based Approach to Modeling Variable-Speed Gearboxes with Multi-Type Clutches

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