Research on Dynamic Coupled Characteristics of A Tracked Vehicle Gearbox

Liu, Hui; Chen, Xiang; Fu, Shengping

doi:10.1080/18756891.2011.9727869

Cited by 8 publications

(7 citation statements)

References 12 publications

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“…f b aims at specifying meshing damping ratio, and according to Ref. [35], the damping ratio varies from 0.03 to 0.17. Hence, the range of f b is chosen as {{0.001:0.002:0.01} {0.02:0.02:0.2} {0.3:0.1:0.9}} which have small steps in the low value range and large steps in the high value range.…”

Section: Simulation Analysismentioning

confidence: 99%

Impulsive Gear Fault Diagnosis Using Adaptive Morlet Wavelet Filter Based on Alpha-Stable Distribution and Kurtogram

2019

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The vibration signals extracted from gearbox are usually masked in heavy background noise. Analyzing the feature components of these signals is challenging and crucial to incipient fault diagnosis. The Kurtogram has been verified as a very powerful and practical tool in the mechanical fault diagnosis due to its advantages in detecting and characterizing transients in signals. However, the accuracy of the kurtogram is limited because it is based on short-time Fourier transform (STFT) or FIR filter in extracting transient characteristics from a noisy signal. Therefore, it is necessary to develop a more accurate filter to overcome its shortcomings and further improve its fault detection accuracy. Wavelet transform has been widely applied in the past as a powerful tool to analyze the non-stationary signals, and an alpha-stable distribution model is often used to describe the statistical features of non-Gaussian signals. In this paper, a Morlet wavelet filter is optimized based on the kurtogram and the alpha parameter of the alpha-stable distribution model. Through the analysis of simulation signals at different fault degrees and operating conditions, it can be concluded that alpha-stable distribution has better performance than kurtosis in measuring the non-Gaussian characteristics of an impulsive gear fault signal. The results obtained from the simulation and practical experiments confirm the superiority of the proposed method for incipient gear fault diagnosis. INDEX TERMS Incipient fault diagnosis, kurtogram, Morlet wavelet, adaptive filter, alpha-stable distribution.

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Section: Simulation Analysismentioning

confidence: 99%

Impulsive Gear Fault Diagnosis Using Adaptive Morlet Wavelet Filter Based on Alpha-Stable Distribution and Kurtogram

2019

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“…where is the damping ratio that is generally equal to 0.03-0.17 [11,28,29], is the mean mesh stiffness, and eq, = / 2 is the equivalent mass of gear ( = , ). Time-varying mesh stiffness can be decomposed into constant part representing the average value and a fluctuating component,…”

Section: Gear Pair Impedancementioning

confidence: 99%

“…Dynamic modeling methods that are able to take into account the housing compliance include finite element method (FEM) [6][7][8], static substructure synthesis method (often referred to as simply substructure synthesis method) [9,10], multibody dynamic modeling method [11], substructural modal synthesis method (often referred to as dynamic substructural synthesis method) [12], and substructural mobility synthesis method [13,14]. Lim and Singh [15] reviewed the overall gearbox dynamics and discussed the major modeling challenges.…”

Section: Introductionmentioning

confidence: 99%

“…Choy et al [17] concluded that the influence of housing on system vibration is more pronounced in a stiffer rotor. Liu et al [11] reported that housing compliance will deteriorate bearing vibration, but He et al [9] showed that housing compliance will decrease vibration of both gear and bearing. Parker et al [8,18] established both a finite element model and a lumped parameter model and concluded that housing has limited influence on the gear dynamic transmission error but can play an important role on the bearing reaction load fluctuation and noise radiation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impedance Synthesis Based Vibration Analysis of Geared Transmission System

Ren

Chang

Liu

et al. 2017

Shock and Vibration

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The severity of gear noise response depends on the sensitivity of geared rotor system dynamics to the transmission error. As gearbox design trending towards lighter weight and lower noise, the influence of housing compliance on system dynamic characteristics cannot be ignored. In this study, a gear-shaft-bearing-housing coupled impedance model is proposed to account for the effect of housing compliance on the vibration of geared transmission system. This proposed dynamic model offers convenient modeling, efficient computing, and ability to combine computed parameters with experimental ones. The numerical simulations on system dynamic characteristics are performed for both a rigid housing configuration and a flexible one. Natural frequencies, dynamic mesh forces, and dynamic bearing reaction loads are computed, and the housing compliance contribution on system dynamic characteristics is analyzed. Results show that increasing housing compliance will decrease the system natural frequencies and will affect the dynamic bearing reaction loads significantly but have very little influence on the dynamic mesh force. Also, the analysis shows that bearing stiffness has significant influence on the degree of housing contribution on system dynamic characteristics.

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“…Yang [7] extracted the lumped parameter of the housing from an appropriate set of frequency response functions and simulated the dynamic response of hypoid gearbox. Liu [8] studied the dynamic characteristic of gear-housing system based on the ADAMS software. Xu [9] investigated the influence of housing flexibility on the dynamic response and load sharing among the planetary gears.…”

Section: Introductionmentioning

confidence: 99%

Vibratory Power Flow Analysis of a Gear‐Housing‐Foundation Coupled System

Ren

Chang

Liu

et al. 2018

Shock and Vibration

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The marine gearbox is usually installed on a vibration isolation system in order to reduce oscillation transmitted to the ship foundation. However, researches on vibration transmission in the gear-housing system and isolation system are currently independent. With the increasing requirement of lower vibration, a coupled model needs to be built to control the vibration propagation from a view of the whole system. Considering the mesh transmission error excitation of a gear pair, a flexible gearhousing-foundation coupled impedance model is constructed in this paper, and the vibratory power flow of the whole system is calculated. Power transmissions between three different gearbox installation configurations, that is, rigid installation, singlestage isolation, and double-stage isolation, are compared. Taking the single-stage isolation configuration as an example, parameter influences on the vibration of the foundation are studied. Results show that double-stage isolation can achieve lower vibration than single-stage isolation; decrease in bearing stiffness or Young's modulus of isolator will yield better vibration isolation performance; housing damping and isolator damping are beneficial to vibration reduction.

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Research on Dynamic Coupled Characteristics of A Tracked Vehicle Gearbox

Cited by 8 publications

References 12 publications

Impulsive Gear Fault Diagnosis Using Adaptive Morlet Wavelet Filter Based on Alpha-Stable Distribution and Kurtogram

Impulsive Gear Fault Diagnosis Using Adaptive Morlet Wavelet Filter Based on Alpha-Stable Distribution and Kurtogram

Impedance Synthesis Based Vibration Analysis of Geared Transmission System

Vibratory Power Flow Analysis of a Gear‐Housing‐Foundation Coupled System

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