Journal of Mechanical Science and Technology最新文献_第10页

Performance degradation prediction of rolling bearing based on temporal graph convolutional neural network 基于时序图卷积神经网络的滚动轴承性能退化预测

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-02 DOI: 10.1007/s12206-024-0702-z

Yaping Wang, Zunshan Xu, Songtao Zhao, Jiajun Zhao, Yuqi Fan

{"title":"Performance degradation prediction of rolling bearing based on temporal graph convolutional neural network","authors":"Yaping Wang, Zunshan Xu, Songtao Zhao, Jiajun Zhao, Yuqi Fan","doi":"10.1007/s12206-024-0702-z","DOIUrl":"https://doi.org/10.1007/s12206-024-0702-z","url":null,"abstract":"Aiming at the prediction model of bearing performance degradation based on recurrent neural network (RNN) and its variants ignores the feature spatial correlation, and cannot effectively handle long time series data, this paper proposes a rolling bearing performance degradation prediction model based on temporal graph convolutional neural network (T-GCN). For non-stationary and nonlinear characteristics of vibration signals, this paper introduces a rolling bearing feature evaluation method based on multiscale dispersion entropy (MDE) to better characterize time series. To effectively solve the spatial correlation problem between samples and features, this paper uses the topological structure of a path graph to build a graph model and combines gated recurrent unit (GRU) and graph convolutional neural network (GCN) to build a T-GCN prediction model. Finally, this article established a rolling bearing fault prediction experimental platform and validated it using the University of Cincinnati public dataset. The experiment shows that compared with GRU, GCN, and LSTM models, the RMSE and the MAE evaluation indicators based on the T-GCN model have decreased by 6 % to 28 % and 11 % to 28 %, respectively, which suggests that the T-GCN model has a higher prediction accuracy and a better model fitting goodness.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation behavior of hollow cylindrical composite tubes under axial compression 轴向压缩下空心圆柱复合管的实验研究行为

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-02 DOI: 10.1007/s12206-024-0506-1

Hayri Yıldırım

{"title":"Experimental investigation behavior of hollow cylindrical composite tubes under axial compression","authors":"Hayri Yıldırım","doi":"10.1007/s12206-024-0506-1","DOIUrl":"https://doi.org/10.1007/s12206-024-0506-1","url":null,"abstract":"In this study, the axial compressive stresses of hollow circular composite tubes were investigated. For this purpose, hollow circular composite tubes with various inner diameters (Ø12 and Ø13 millimeters), a height of 80 millimeters, and an outer diameter kept constant at Ø17 millimeters were fabricated using a fiber winding process. In the production of hollow circular tubes, epoxy was used as resin, and glass fiber, carbon fiber, and Kevlar fiber were used as reinforcement materials. Experimental investigations were carried out for three different reinforcement materials, two thin-wall thicknesses, and five orientation angles. Axial compression tests were performed to research the influences of reinforcement materials, thin-wall thickness, and orientation angles on the compressive stresses. The axial compressive strength of the samples was observed experimentally by applying the load in the vertical direction. The reinforcement material, orientation angle, and thin-walled thickness had an important influence on the axial compressive stress. The glass/epoxy reinforcement material was found to have the highest axial compressive strength at 204 Mpa. When the orientation angle increased from 45° to 88°, the axial compressive stress increased by 2.27 times in glass/epoxy, 2.36 times in carbon/epoxy, and 2.37 times in Kevlar/epoxy specimens, respectively. In addition, by increasing the specimen wall thickness by 0.5 millimeters, the axial compressive stress at an 88° orientation angle increased by 9.67 % glass/epoxy, 11.85 % carbon/epoxy, and 7.14 % Kevlar/epoxy specimens.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Liquid–solid two-phase flow and wear characteristics in a two-stage mixed-transport pump 双级混合输送泵中的液固两相流和磨损特性

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-02 DOI: 10.1007/s12206-024-0716-6

Yi Li, Jincheng Chen, Zhe Lin, Guang Zhang, Zhenjun Gao, Oybek Ishnazarov

引用次数: 0

Parametric investigation on stepped-lap scarf repair of wind turbine blade spar cap 风力涡轮机叶片翼缘盖阶梯式搭接疤痕修复参数研究

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-02 DOI: 10.1007/s12206-024-0707-7

Wen Xin, Bo Zhou, Hui Li, Xiao-long Lu, Ning Sun

引用次数: 0

Characteristics of tribo-oxidation surface evolution in molybdenum–tungsten–vanadium hot-work die steel 钼-钨-钒热作模具钢的三氧化表面演变特征

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-02 DOI: 10.1007/s12206-024-0618-7

Shuang Li, Zhen Wang, Zhen Cao, Long Liu, Yang Wang

引用次数: 0

Intelligent wheelchair human–robot interactive system based on human posture recognition 基于人体姿势识别的智能轮椅人机交互系统

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-02 DOI: 10.1007/s12206-024-0731-7

Yali Han, Lei Zhou, Weijia Jiang, Gairan Wang

引用次数: 0

Remaining useful life prediction of industrial robot RV reducer with multiple deep networks and multicore support vector data description 利用多重深度网络和多核支持向量数据描述预测工业机器人 RV 减速器的剩余使用寿命

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-02 DOI: 10.1007/s12206-024-0703-y

Guoai Ren, Zhihai Wang, Xiaoqin Liu, Feng Song

引用次数: 0

RANS-based CFD methodology and modeling of a 1/100 scale thermoelectric power generation system for container ships 基于 RANS 的集装箱船 1/100 比例热电发电系统 CFD 方法与建模

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-02 DOI: 10.1007/s12206-024-2112-7

Myeong-Jin Seo, Ki-Kon Kwak, Soo-Min Kang, Jae-Ho Jeong

{"title":"RANS-based CFD methodology and modeling of a 1/100 scale thermoelectric power generation system for container ships","authors":"Myeong-Jin Seo, Ki-Kon Kwak, Soo-Min Kang, Jae-Ho Jeong","doi":"10.1007/s12206-024-2112-7","DOIUrl":"https://doi.org/10.1007/s12206-024-2112-7","url":null,"abstract":"As environmental regulations on exhaust gas are enforced worldwide and marine transportation is progressively strengthened, various methods are being explored to comply with emission regulations by using alternative energy sources. This study involved the optimization of a thermoelectric power generation (TEG) system, which converts thermal energy into electrical energy. The design of the TEG system was optimized by using CFD to analyze the heat transfer phenomena resulting from the relative positions of the TEG modules, and the results of this analysis were validated with 1/100 experimental scale measurement data. The comparison of the CFD results with the experimental measurements revealed that the maximum discrepancy exists for the temperature near the cooling jacket and for the amount of power generated by the system. The significant difference between the CFD and experimental results is attributable to the adiabatic conditions assumed for CFD since the experimental facility experiences heat loss to the atmosphere. In this study, we established an analysis methodology by conducting a comparative validation between CFD calculations and experimental data. The methodology is expected to play a significant role in optimizing the design of thermoelectric power generation systems.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation of indirect solar dryer integrated with wicked heat pipe 集成了邪恶热管的间接太阳能干燥器的实验研究

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-02 DOI: 10.1007/s12206-024-0735-3

Vismaya K. Sachithanandhan, A. Asha Monicka, A. Brusly Solomon, G. Jeevarathinam, Tanmay Yadav, R. Ajith

引用次数: 0

A Newton method with characteristic value correction for geometric error calibration of parallel mechanism 带特征值修正的牛顿法校准并联机构的几何误差

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-08-02 DOI: 10.1007/s12206-024-0729-1

Xiangyu Guo, Rui Wang, Minghang Zhao, Shisheng Zhong

{"title":"A Newton method with characteristic value correction for geometric error calibration of parallel mechanism","authors":"Xiangyu Guo, Rui Wang, Minghang Zhao, Shisheng Zhong","doi":"10.1007/s12206-024-0729-1","DOIUrl":"https://doi.org/10.1007/s12206-024-0729-1","url":null,"abstract":"To address the ill-conditioning of the Jacobian matrix in the geometric error calibration of parallel mechanisms, a Newton method with characteristic value correction (NMCVC) is proposed. This method integrates and enhances the principles of the characteristic value correction iteration method (CVCIM), and Newton method, offering targeted improvements for more effective calibration. First, the damping coefficient is introduced into the CVCIM, and an adaptive strategy for determining the damping coefficient is developed with rigorous proof steps according to the relationship between the condition number and the singular value, which enhances computing efficiency while avoiding the ill-conditioning of the Jacobian matrix. Second, a dynamic adjustment strategy for the CVCIM’s termination condition is designed. This strategy initially estimates the descending direction roughly to approximate the actual descending direction, enhancing computing speed, and then estimates it more accurately at the end of the training stage to obtain precise geometric error values. Finally, by taking a 3RPS parallel mechanism as the instance, three sets of simulation experiments have been designed to test and verify the effectiveness of the algorithm.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141884148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0