Frequency analysis of a two-stage planetary gearbox using two different methodologies

Féki, Nabih; Karray, Maha; Khabou, Mohamed Taoufik; Chaari, Fakher; Haddar, Mohamed

doi:10.1016/j.crme.2017.10.001

Cited by 20 publications

(13 citation statements)

References 11 publications

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“…In the perfect condition, the vibration signal x(t) of the gearbox can be expressed as the following equation or its modified form [15,37,40,41]…”

Section: The Phenomenological Modelmentioning

confidence: 99%

“…Subsequently, their staff derived the spectrum structure of the vibration signals under non-equal load distribution conditions [13]. Some scholars have compared the results of phenomenological models with LPM, such as Parra et al [14], Torregrosa et al [5], and Feki et al [15]. In terms of the efficiency of generating the vibration signal of the gearbox, the phenomenological model is the highest, but it also has obvious defects.…”

Section: Introductionmentioning

confidence: 99%

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An Improved Phenomenological Model of the Planetary Gearbox Based on Meshing Vibration Characteristics

Luo

Cui

2020

IEEE Access

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With the construction of periodic functions relative to the meshing frequency, rotating frequency, and the faulty frequency, etc., the phenomenological model provides a simple and effective way of representing the vibration signal of the planetary gearbox. However, due to that the meshing vibration is simplified, the traditional model can only reflect the modulation characteristic of the signal, but not the impact characteristic. Therefore, an improved phenomenological model is proposed, which can satisfy these two characteristics of the vibration signal at the same time. To consider the meshing vibration correctly, two key points should be determined: occurring moment of impact signals, and their relative amplitudes. In order to calculate the occurring time, this paper proposes modifying the reference point of the meshing phase and using the modified phases to represent it. Then two experiments are designed to verify the correctness of the modified phases and the occurring moment. Fortunately, these experimental results also provide a factual basis for determining the relative amplitudes of these impact signals. Subsequently, signal model of the gearbox in the healthy state is established based on the meshing vibration characteristics. The simulation results show that the new model can satisfy the modulation and impact characteristics. In addition, combined with the time-varying meshing stiffness of the gear pair, the paper theoretically analyzes the influence of fault type, location, and size on the impact frequency in a fault meshing period. Finally, the correctness of the new phenomenological model is verified by experiments.

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“…In the perfect condition, the vibration signal x(t) of the gearbox can be expressed as the following equation or its modified form [15,37,40,41]…”

Section: The Phenomenological Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Improved Phenomenological Model of the Planetary Gearbox Based on Meshing Vibration Characteristics

Luo

Cui

2020

IEEE Access

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“…The most commonly used devices for the experimental research of power transmissions are accelerometers. The location on the planetary gearbox of these devices is especially important, because planetary gears create similar vibrations passing through a fixed sensor [26].…”

Section: Options For Experimental Researchmentioning

confidence: 99%

Investigation of the opportunities for experimental research of gear trains vibrations

2019

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The improvement of the dynamic and exploitation characteristics of power transmissions is a significant and important problem. The solution of this problem becomes possible through improving the methods in the area of machine design and the existing approaches in experimental investigations. The vibrations in different technical systems including driving systems and power transmissions increase the noise level and the dynamic load. Therefore, the frequency analysis of these systems is especially important. The theoretical analysis of the dynamic behaviour of gear trains indicates that the vibrations in the area of the resonance zone display non-linear character as a result of partial or complete loss of contact in the meshing. The objective of the research presented is to investigate the dynamic behaviour of gear trains. An experimental test device for measuring, processing and analysis of the gear train vibrations has been deigned. The opportunities for data processing in an environment of LabVIEW and/or MATLAB aiming to obtain in an experimental way relationships demonstrating acceleration and resonant frequencies.Conclusions and recommendations have been summarized.

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“…For example, Zuoqing and Xuezhi [4] supposed that the vibration and noise problems in gear transmission were relevant to gear meshing stiffness and damping; Fakher et al [5] investigated the relationship between the gearbox vibration and the fluctuating load conditions, the experimental validation also confirmed that the time-varying load effects should be the main excitation for the dynamic performance responses of the gearbox; Jing et al [6] considered the transmission error was an important reason for the instability in helical gears, they concluded that some basic gear meshing parameters, such as involute contact ratio, bearing supporting stiffness, mesh damping and backlash and so on could influence the dynamic transmission errors, and the vibration stability of the helical gear system was obviously involved in gear train transmission errors. Regarding to other factors besides gear meshing, Noroozi et al [7] validated that the strength and stiffness of the foundation support structures were also relevant to gearbox vibration problems; Feki et al [8] made a frequency analysis for two cases of a certain two-stage planetary gearbox in order to investigate vibration signals, the results demonstrated that the specific geometry and structure of gear train were relevant to dynamic responses. The conclusions imply that the dynamic performance of gearbox can be decided as long as to design the geometry of the gear train and the structure of the gearbox.…”

Section: Introductionmentioning

confidence: 99%

Research on gearbox dynamic design methodology based on modal optimization

Li¹,

Zhou²

2020

J. vibroeng.

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The vibration reduction shall be considered as the most important purpose of dynamic performance optimization for gearbox, and some particular vibration is relevant to the modes of integrated system of gearbox. The dynamic performance influences the reliability of gearbox obviously, but it is difficult to be considered critically at the theoretical design phase. This paper proposes a kind of "Gearbox Dynamic Design Methodology" which can control the system vibration of the product at the theoretical design phase. The research investigates the relationship between the vibration and the system modes of gearbox by using multi-body dynamic simulation; and also discusses the method to regulate design parameters in order to optimize the mode characteristic (modal optimization). The methodology is summarized as per the discussions, and the effectiveness of vibration control is validated by multiple vibration experiments.

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Frequency analysis of a two-stage planetary gearbox using two different methodologies

Cited by 20 publications

References 11 publications

An Improved Phenomenological Model of the Planetary Gearbox Based on Meshing Vibration Characteristics

An Improved Phenomenological Model of the Planetary Gearbox Based on Meshing Vibration Characteristics

Investigation of the opportunities for experimental research of gear trains vibrations

Research on gearbox dynamic design methodology based on modal optimization

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