Vibroengineering PROCEDIA最新文献_第6页

Simulation analysis of thermal shock response of piezoelectric shock wave pressure sensor 压电式冲击波压力传感器热冲击响应仿真分析

Vibroengineering PROCEDIA Pub Date : 2023-10-20 DOI: 10.21595/vp.2023.23592

Xueliang Guo, Deren Kong

{"title":"Simulation analysis of thermal shock response of piezoelectric shock wave pressure sensor","authors":"Xueliang Guo, Deren Kong","doi":"10.21595/vp.2023.23592","DOIUrl":"https://doi.org/10.21595/vp.2023.23592","url":null,"abstract":"Under the influence of transient high temperatures, piezoelectric shock wave pressure sensors produce a thermal shock response that affects the accurate acquisition of the pressure signal. In order to analyse the effect of thermal shock on the measurement of piezoelectric pressure sensors, a rectangular pulse temperature of 1800 ℃ with a duration of 30 ms was applied to the surface of the sensor diaphragm by the method of thermal coupling, and the temperature distribution inside the sensor under transient thermal excitation was explored, and the thermal expansion displacement and preload change of the sensor were analysed. The results show that: the temperature rise of the piezoelectric crystal is small and does not reach the Curie point temperature, which has less influence on the material properties of the piezoelectric crystal; the thermal shock response of the piezoelectric pressure sensor is mainly caused by the thermal deformation of the pressure-sensing diaphragm, which affects the stability of the preload inside the sensor and leads to a negative signal output from the sensor. This study provides a reference for the research of thermal shock suppression methods for piezoelectric pressure sensors.","PeriodicalId":262664,"journal":{"name":"Vibroengineering PROCEDIA","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135618580","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

Investigation of torsion angle measurement method in spatial cables of suspension bridges 悬索桥空间索扭转角测量方法研究

Vibroengineering PROCEDIA Pub Date : 2023-10-20 DOI: 10.21595/vp.2023.23636

Guangqing Xiao, Fucheng Wu, Shuidong Cao, Cheng Zheng

{"title":"Investigation of torsion angle measurement method in spatial cables of suspension bridges","authors":"Guangqing Xiao, Fucheng Wu, Shuidong Cao, Cheng Zheng","doi":"10.21595/vp.2023.23636","DOIUrl":"https://doi.org/10.21595/vp.2023.23636","url":null,"abstract":"Spatial cables in suspension bridges may twist between two adjacent suspension points due to transverse tension. To determine the spatial torsion angle of the cables, a scale-reduced suspender bridge model was fabricated and tested in this study. The cable torsion angles of the bridge model under different loading cases were obtained and presented. Theoretical methods (e.g., the coordinate method and the angle method) to calculate the spatial cable torsion angle in the suspender bridge were developed by analyzing the deforming characteristics of the suspender cables. The feasibility and predictive accuracy of the proposed methods were assessed using the experimental results. Results show that the proposed coordinate and angle methods produced similar torsion angles for the main cables, showing a maximum relative error of 10.4 %. Compared to the coordinate method's complex data transformation and measurement procedures, the angle method is more convenient, efficient, and easier to calculate the torsion angle of the main cable. Despite the capability of calculating the spatial cable torsion angles, the coordinate method also exhibits advanced capability in determining the geometric curves of the main cable under different spatial angles.","PeriodicalId":262664,"journal":{"name":"Vibroengineering PROCEDIA","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135618721","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

Determination of proper parameters for ultrasonic welding of copper plate with copper wire strands 铜板与铜线束超声焊接适当参数的测定

Vibroengineering PROCEDIA Pub Date : 2023-10-20 DOI: 10.21595/vp.2023.23680

Dacian Ilca, Tiberiu Manescu, Gilbert-Rainer Gillich, Zeno-Iosif Praisach, Cristian Tufisi

引用次数: 0

Classification of present faults in rotating machinery based on time and frequency domain feature extraction 基于时频域特征提取的旋转机械故障分类

Vibroengineering PROCEDIA Pub Date : 2023-10-20 DOI: 10.21595/vp.2023.23667

Anastasija Ignjatovska, Dejan Shishkovski, Damjan Pecioski

{"title":"Classification of present faults in rotating machinery based on time and frequency domain feature extraction","authors":"Anastasija Ignjatovska, Dejan Shishkovski, Damjan Pecioski","doi":"10.21595/vp.2023.23667","DOIUrl":"https://doi.org/10.21595/vp.2023.23667","url":null,"abstract":"The need for an effective and efficient maintenance process increases with the level of complexity of modern rotating machinery. This paper introduces a methodology for transforming raw vibration signals into adequate inputs for machine learning classification algorithms in order to identify present faults in rotating machinery. It complements a previous study by the same authors, which covers the processing of vibrational signals by determining the optimal sampling frequency and using appropriate filters for the raw data. The first part of this study covers feature extraction using time and frequency-domain techniques and correlation matrices are plotted to determine which extracted features are significantly connected and what is the level of their correlation. The study continues with the use of Neighborhood Component Analysis (NCA) where weight factors of the features are calculated in terms of recognizing the present rotating machinery faults. Only the ones with the highest level of importance have been used as input for the classification algorithms. The MATLAB Add-in Classification Learner has been used for training and testing various classification algorithms. K-nearest neighbors classifier (KNN), Support vector machines (SVM), and Wide Neural Network (NN) showed the highest accuracy in distinguishing ten different fault conditions. For this case study, the MaFaulda vibration dataset has been used and ten operating conditions have been considered: normal, imbalance, horizontal misalignment, vertical misalignment, and three faults in the underhang bearing and the overhang bearing.","PeriodicalId":262664,"journal":{"name":"Vibroengineering PROCEDIA","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135618710","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

Damage detection in variable temperature conditions using artificial intelligence 使用人工智能进行变温度条件下的损伤检测

Vibroengineering PROCEDIA Pub Date : 2023-10-20 DOI: 10.21595/vp.2023.23679

Alexandra-Teodora Aman, Cristian Tufisi, Gilbert-Rainer Gillich, Tiberiu Manescu

{"title":"Damage detection in variable temperature conditions using artificial intelligence","authors":"Alexandra-Teodora Aman, Cristian Tufisi, Gilbert-Rainer Gillich, Tiberiu Manescu","doi":"10.21595/vp.2023.23679","DOIUrl":"https://doi.org/10.21595/vp.2023.23679","url":null,"abstract":"When considering damage detection using the natural frequencies of structures, small frequency drops can indicate either the presence of cracks or a temperature change. This change can lead to additional stress affecting the modal parameters for specific structures, making it much harder to detect, locate, and evaluate damage accurately. The current research aims to describe a method for detecting transverse cracks in beams, considering temperature variations. The considered beam is fixed at both ends, thus inducing axial forces when the temperature is increased. The influence of temperature is considered using adjustment coefficients developed for each vibration mode. This coefficient can be used to accurately calculate the natural frequency for an intact or damaged beam. An analytical method for determining the natural frequencies caused by the changing temperature and the presence of a transverse crack is described and used to generate data for training a feedforward artificial neural network (ANN). The ANN’s capability of determining the position of transverse cracks in double-clamped beams subjected to small temperature changes is proven by creating numerical simulations with known crack positions and thermal conditions for testing the developed method.","PeriodicalId":262664,"journal":{"name":"Vibroengineering PROCEDIA","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135618712","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

Finite element analysis of concealed angle steel node in prefabricated frame beams and columns 装配式框架梁柱隐伏角钢节点有限元分析

Vibroengineering PROCEDIA Pub Date : 2023-10-20 DOI: 10.21595/vp.2023.23548

Zhe Li, Wei Yuan, Xingyu Chen, Shuai Zhang

{"title":"Finite element analysis of concealed angle steel node in prefabricated frame beams and columns","authors":"Zhe Li, Wei Yuan, Xingyu Chen, Shuai Zhang","doi":"10.21595/vp.2023.23548","DOIUrl":"https://doi.org/10.21595/vp.2023.23548","url":null,"abstract":"Prefabricated construction is a structural form vigorously developed by the country and is the inevitable path for the sustainable development of the construction industry. In order to enhance the seismic performance of prefabricated concrete frame structures, concealed steel angle connections for prefabricated frame beams and columns are employed. Based on experimental research on the force performance of these connection nodes, a finite element model of the connection node is established using ABAQUS software to analyze the influence of design parameters on the force performance of the specimen. The analysis indicates that upgrading the concrete grade from C25 to C55 increases the positive bearing capacity by 12.3 %. The specimen’s energy dissipation capacity and stiffness are both improved. Increasing the thickness of the steel cover plate can enhance the specimen's bearing capacity, stiffness, and energy dissipation capacity. Increasing the angle steel thickness from 4 mm to 10 mm results in a 27.78 % increase in negative bearing capacity, consequently enhancing the specimen’s energy dissipation capacity. By increasing the bolt diameter from 16 mm to 24 mm, the positive bearing capacity increases by 8.2 %, and the negative bearing capacity increases by 10.9 %. The energy dissipation capacity and stiffness of the specimen also improve accordingly.","PeriodicalId":262664,"journal":{"name":"Vibroengineering PROCEDIA","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135618564","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

Prediction of liquefaction time based on time-frequency distribution of seismic records 基于地震记录时频分布的液化时间预测

Vibroengineering PROCEDIA Pub Date : 2023-10-20 DOI: 10.21595/vp.2023.23540

Hua Lu, Yanxin Yang, Xudong Zhan, Ziyun Lin

引用次数: 0

Study on geotechnical performance of high-grade highway subgrade applied with fly ash 掺加粉煤灰高等级公路路基的岩土性能研究

Vibroengineering PROCEDIA Pub Date : 2023-10-20 DOI: 10.21595/vp.2023.23503

Si Wu, Kai Wang, Liping Li

引用次数: 0

Prediction model of lateral spreading of liquefied soil during earthquakes based on neural network 基于神经网络的地震液化土横向扩展预测模型

Vibroengineering PROCEDIA Pub Date : 2023-10-20 DOI: 10.21595/vp.2023.23541

Yanxin Yang, Ziyun Lin, Hua Lu, Xudong Zhan

引用次数: 0

Generating rectilinear, elliptical, and circular oscillations of a single-mass vibratory system equipped with an enhanced twin crank-type exciter 用增强型双曲柄激振器产生单质量振动系统的直线、椭圆和圆振荡

Vibroengineering PROCEDIA Pub Date : 2023-10-20 DOI: 10.21595/vp.2023.23657

Vitaliy Korendiy, Oleksandr Kachur, Rostyslav Predko, Oleh Kotsiumbas, Rostyslav Stotsko, Mykola Ostashuk

{"title":"Generating rectilinear, elliptical, and circular oscillations of a single-mass vibratory system equipped with an enhanced twin crank-type exciter","authors":"Vitaliy Korendiy, Oleksandr Kachur, Rostyslav Predko, Oleh Kotsiumbas, Rostyslav Stotsko, Mykola Ostashuk","doi":"10.21595/vp.2023.23657","DOIUrl":"https://doi.org/10.21595/vp.2023.23657","url":null,"abstract":"One of the most intensively developing fields of vibratory technologies is focused on improving the design and operational parameters of the excitation mechanisms and drives. The present research is devoted to a novel twin crank-type exciter driven by a permanent-magnet direct-current motor. The research methodology consists of mathematical modeling and computer simulation of the dynamic behavior of a single-mass oscillatory system equipped with the proposed exciter. The obtained results substantiate the possibilities of generating rectilinear, elliptical, and circular oscillations of the working member by applying the corresponding design changes of the transformable vibration exciter. The major scientific novelty of the carried-out investigations consists in determining the influence of specific design parameters of the exciter on the trajectory (path) of the working member motion. The obtained results can have a significant practical value while designing new and improving existent drives of various vibratory equipment (screens, conveyors, sieves, compactors, technological (lapping, polishing) machines, etc.).","PeriodicalId":262664,"journal":{"name":"Vibroengineering PROCEDIA","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135618572","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