Noise and Vibration Worldwide最新文献_第9页

Research progress on bearing fault diagnosis with localized defects and distributed defects for rolling element bearings 滚动轴承局部缺陷与分布缺陷故障诊断研究进展

Noise and Vibration Worldwide Pub Date : 2022-07-01 DOI: 10.1177/09574565221114661

Samruddhi Patel, Utpal Shah, B. Khatri, U. Patel

引用次数: 1

Relative acoustic nonlinearity parameter variation with local defect resonance frequencies and its different harmonics 相对声学非线性参数随局部缺陷谐振频率及其不同谐波的变化

Noise and Vibration Worldwide Pub Date : 2022-07-01 DOI: 10.1177/09574565221114656

Nsvn Hanuman, T. Bose

{"title":"Relative acoustic nonlinearity parameter variation with local defect resonance frequencies and its different harmonics","authors":"Nsvn Hanuman, T. Bose","doi":"10.1177/09574565221114656","DOIUrl":"https://doi.org/10.1177/09574565221114656","url":null,"abstract":"In recent times, nonlinear ultrasonic inspection has become a very reliable technique to characterize micro-scale cracks and small-scale delaminations. In this paper, an analytical framework is developed for the orthotropic composite plate to calculate the variation of relative acoustic nonlinearity parameter, a quantitative measurement of nonlinearity at the delamination region. The analytical investigation is justified with numerical and experimental research using a carbon fiber-reinforced polymer (CFRP) plate with three delaminations. Two incident waves are used for excitation, out of which the first wave frequency is varied as local defect resonance (LDR) frequency (fd), subharmonic LDR frequency (2fd), second-order superharmonic LDR frequency (fd/2), and third-order superharmonic LDR frequency (fd/3) while the second incident wave is taken as a single periodic frequency. Different delamination sizes, positions, and depths were used to understand the second-order relative acoustic nonlinearity parameter (β2) with other LDR frequencies as well as its harmonics. It has been observed from analytical, numerical, and experimental results that the relative acoustic nonlinearity parameter is maximum at LDR frequencies. It increases in case of surface level delaminations.","PeriodicalId":55888,"journal":{"name":"Noise and Vibration Worldwide","volume":"53 1","pages":"343 - 351"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48920057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of blast-induced peak particle velocity using ensemble machine learning algorithms: A case study 使用集成机器学习算法估计爆炸引起的峰值粒子速度：一个案例研究

Noise and Vibration Worldwide Pub Date : 2022-07-01 DOI: 10.1177/09574565221114662

P. Ragam, Ashoka Reddy Komalla, Nikhitha Kanne

{"title":"Estimation of blast-induced peak particle velocity using ensemble machine learning algorithms: A case study","authors":"P. Ragam, Ashoka Reddy Komalla, Nikhitha Kanne","doi":"10.1177/09574565221114662","DOIUrl":"https://doi.org/10.1177/09574565221114662","url":null,"abstract":"Over recent decades, ambiguous ground vibration induced by blasting operation can cause extensive damage to structures, lives and fields in and around mine premises. As a consequence, it is indispensable to measure the ambiguous ground vibration intensity levels for assessing and reduce their perilous impact. In this investigation, estimation and evaluation of blast-induced ground vibration in terms of peak particle velocity (PPV) through the ensemble machine learning intelligent algorithms were carried out. One hundred and 21 experimental and blasting events were monitored to collect the real-time field data in Mine-A, India. The collected data was randomly split into training and testing to generate models. Eight input parameters include number of holes, burden, spacing, hole diameter, hole depth, top stemming, maximum explosive charge per delay and the distance were selected for development of ensemble machine learning algorithms. An eXtreme gradient boosting (XGBoost) and random forest (RF) ensemble model, Decision Tree were developed to assess the PPV levels. In addition to that, four empirical predictor models proposed by the US Bureau of Mines, Langefors–Kihlstrom, Central Mining Research Institute, and Bureau of Indian Standards were applied to derive a relation between PPV and its influencing parameters. The accuracy and efficiency of developed models can be determined by performance evaluation metrics chosen as the coefficient of determination (R2), and root mean square error (RMSE). Among all models, yielded results evidence that the Decision Tree ensemble model with the R2 of 0.9549, and RMSE of 0.0444 was more precise optimum model to assess the PPV. Besides, a sensitivity analysis method was applied in this current study to know the role of the input parameters in estimating PPV. The determined results inferred that burden, number of holes and top stemming are more influenced parameters on the intensity of PPV levels.","PeriodicalId":55888,"journal":{"name":"Noise and Vibration Worldwide","volume":"53 1","pages":"404 - 413"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49229161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Experimental analysis of steering wheel vibrations of an agriculture tractor for reduction of hand-arm vibrations 农用拖拉机方向盘振动试验分析，以减少手臂振动

Noise and Vibration Worldwide Pub Date : 2022-05-22 DOI: 10.1177/09574565221093252

S. S. Naygaonkar, S. Desai

引用次数: 0

Fault feature extraction method of gear based on spectral amplitude modulation and autocorrelation analysis 基于谱调幅和自相关分析的齿轮故障特征提取方法

Noise and Vibration Worldwide Pub Date : 2022-05-22 DOI: 10.1177/09574565221093249

X. Zhong, Q. Mei, Xiang Gao, Tianwei Huang, Xiao Zhao

引用次数: 0

Grey correlation analysis of milling temperature and milling vibration of TC4 titanium alloy TC4钛合金铣削温度与铣削振动的灰色关联分析

Noise and Vibration Worldwide Pub Date : 2022-05-22 DOI: 10.1177/09574565221093251

S. Li, Yuting Hu, E. Popov

引用次数: 3

The study of the vibration under different lubrication states based on Stribeck curve 基于Stribeck曲线的不同润滑状态下的振动研究

Noise and Vibration Worldwide Pub Date : 2022-05-21 DOI: 10.1177/09574565221093247

Hai J Yu, Haijun Wei

引用次数: 1

Approximating amplitude of a nonlinear oscillator at resonance 非线性振荡器在共振时的近似振幅

Noise and Vibration Worldwide Pub Date : 2022-05-21 DOI: 10.1177/09574565221093246

Saeesh Verenkar, Raghavendra D. Naik

引用次数: 0

Empirical prediction model of psychophysiological responses of workers with respect to noise exposure based on random forest 基于随机森林的工人噪声暴露心理生理反应的经验预测模型

Noise and Vibration Worldwide Pub Date : 2022-05-21 DOI: 10.1177/09574565221093258

Mostafa Rahmiani Iranshahi, M. Aliabadi, R. Golmohammadi, A. Soltanian, M. Babamiri

{"title":"Empirical prediction model of psychophysiological responses of workers with respect to noise exposure based on random forest","authors":"Mostafa Rahmiani Iranshahi, M. Aliabadi, R. Golmohammadi, A. Soltanian, M. Babamiri","doi":"10.1177/09574565221093258","DOIUrl":"https://doi.org/10.1177/09574565221093258","url":null,"abstract":"Evidence of the non-auditory effects of noise exposure on workers is growing. This study aimed to empirically present prediction models of psychophysiological responses of workers with respect to noise exposure. In this study, 169 male workers from typical industrial workrooms were asked to judge the mental workload, noise annoyance, and noise sensitivity during exposure to noise. Two main physiological responses that include heart rate and blood pressure were also measured. Noise exposure characteristics were measured using the calibrated instruments. Empirical prediction models were developed based on Random forest compared with the regression method. 46% of the workers were exposed to noise up to the exposure limit (85 dB for 8 h) and 54% of the workers were exposed to noise upper than it. It is observed that the considerable body response changes of workers exposed to noise from the medium to high levels (p < 0.05). Random forest could provide more accurate predictions than multiple regressions (R square = 0.73 to 0.80). Four variables as noise dose, noise sensitivity, age, and noise frequency are found to be the important factors influencing the psychological responses, respectively. Moreover, the main variables as noise sensitivity and noise dose and age are found to be the important factors influencing the physiological responses, respectively. Changes in the psychophysiological responses above the medium noise levels confirmed that the action level (82 dB for 8 h) can be a suitable criterion to prevent possible auditory and non-auditory complications. These dose-response models can be helpful in setting definitive exposure limits for noise-induced non-auditory effects at workplaces.","PeriodicalId":55888,"journal":{"name":"Noise and Vibration Worldwide","volume":"53 1","pages":"290 - 299"},"PeriodicalIF":0.0,"publicationDate":"2022-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45518548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Experimental and theoretical investigations of unbalance flexible rotor in active magnetic bearings considering backup bearings contacts 考虑备用轴承接触的主动磁轴承不平衡柔性转子的实验与理论研究

Noise and Vibration Worldwide Pub Date : 2022-04-01 DOI: 10.1177/09574565221093223

R. Ebrahimi

{"title":"Experimental and theoretical investigations of unbalance flexible rotor in active magnetic bearings considering backup bearings contacts","authors":"R. Ebrahimi","doi":"10.1177/09574565221093223","DOIUrl":"https://doi.org/10.1177/09574565221093223","url":null,"abstract":"This paper describes the experimental verification of an unbalance flexible rotor model in active magnetic bearings. The dynamic modeling takes into account the gyroscopic moments of the disk, geometric coupling of the magnetic actuators, and contact forces of the backup bearings. The Rung–Kutta method is used to integrate the equations of motion. The nonlinear dynamic response is analyzed using bifurcation plots, disc center trajectories, Fast Fourier Transforms, Poincaré maps, and maximum Lyapunov exponent. The analysis is carried out for different values of rotating speed and unbalance eccentricity. In the unbalance test, a concentrated mass of 5 gr is attached in three radial position of the disk. The numerical simulations and experiments prove that a variety of nonlinear dynamical phenomena such as period-3, -4, -8, periodic, quasi-periodic, and chaotic motions occur in the system. The results indicate that the response of the rotor returns back to a regular motion by increasing the rotational speed. Also, by increasing the unbalance eccentricity, the first irregular motion initiates at much higher rotational speeds. Therefore, sufficient attention should be paid to these factors in design of a flexible rotor system equipped with both active magnetic bearings and backup bearings in order to ensure system reliability.","PeriodicalId":55888,"journal":{"name":"Noise and Vibration Worldwide","volume":"53 1","pages":"161 - 171"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42480292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1