Journal of Mechanical Science and Technology最新文献_第3页

Multi-objective optimization and fracture analysis of laser weld joints of Ni-Cr superalloy 80 A for gas turbine components 用于燃气轮机部件的镍铬超合金 80 A 激光焊接接头的多目标优化和断裂分析

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0822-5

Suman Kumar Saurabh, Prabha Chand, Umacharan Singh Yadav

引用次数: 0

A systematic design method for additive manufacturing: reconceptualizing product architecture 用于增材制造的系统设计方法：重新构思产品结构

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-2408-7

Samyeon Kim, Yunlong Tang, Sang-in Park, David W. Rosen

引用次数: 0

Influence of control system on aerodynamic characteristics and elastic deformation of horizontal axis wind turbine blades 控制系统对水平轴风力涡轮机叶片气动特性和弹性变形的影响

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0824-3

Pan He, Jian Xia

{"title":"Influence of control system on aerodynamic characteristics and elastic deformation of horizontal axis wind turbine blades","authors":"Pan He, Jian Xia","doi":"10.1007/s12206-024-0824-3","DOIUrl":"https://doi.org/10.1007/s12206-024-0824-3","url":null,"abstract":"The operation of wind turbines involves a complex interaction between aerodynamics, structural mechanics, and control systems. However, the control system is frequently overlooked. To investigate the impact of the control system on the aerodynamic characteristics and elastic deformations of wind turbines, this paper initially integrates the control system into the blade element momentum theory (BEMT) for calculating aerodynamic forces. Subsequently, the control system is incorporated into fluid-structure interaction (FSI) calculations to assess its influence on the overall performance of the turbine. The control system employs variable speed and pitch control, while the structural dynamics are modeled using the Euler-Bernoulli beam theory. When the control system is integrated with blade element momentum theory to calculate the aerodynamic forces of the wind rotor, it is observed that, below the rated wind speed, a portion of the torque error is transferred to the rotor speed. In contrast, above the rated wind speed, the entire torque error is transferred to the blade pitch angle (BPA). Crucially, when the control system is integrated, the rotor speed and BPA are no longer treated as known parameters. This approach enables the prediction of aerodynamic characteristics of the wind rotor, particularly under complex wind speed profiles. The control system exerts a significant influence on the FSI results, particularly in the range of wind speeds that correspond to larger blade deformations. This work can provide a reference for the calculation of aerodynamic characteristics and FSI of wind turbines under complex wind conditions.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":"70 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142198847","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

A new method for fast and accurate identification of tool-workpiece relative vibration based on machining surface topography 基于加工表面形貌快速准确识别刀具-工件相对振动的新方法

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0701-0

Guocai Du, Jiasheng Li, Ming Huang, Hong Yang

引用次数: 0

Development of a lightweight, large-scale stainless-steel plate heat pipe (SPHP) fin for enhanced cooling in high-power electronics 开发用于增强大功率电子设备冷却效果的轻质大型不锈钢板热管 (SPHP) 散热片

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0847-9

Duk-Yong Kim, Kyo-Sung Ji, Jin Kook Seo, Chi-Back Ryu, Jun-Woo Yang, Hye-Yeon Kim, Wonseok Yang, Ki-Pung Yoo, Ingyu Lee, Jooho Lee, Nahmkeon Hur

{"title":"Development of a lightweight, large-scale stainless-steel plate heat pipe (SPHP) fin for enhanced cooling in high-power electronics","authors":"Duk-Yong Kim, Kyo-Sung Ji, Jin Kook Seo, Chi-Back Ryu, Jun-Woo Yang, Hye-Yeon Kim, Wonseok Yang, Ki-Pung Yoo, Ingyu Lee, Jooho Lee, Nahmkeon Hur","doi":"10.1007/s12206-024-0847-9","DOIUrl":"https://doi.org/10.1007/s12206-024-0847-9","url":null,"abstract":"A lightweight large-scale stainless-steel plate heat pipe (SPHP) fin has been developed for cooling high-power electronics, employing very thin 0.15 mm plates and a 3D rib-lattice structure to optimize heat pipe operation. Eco-friendly deionized (DI) water serves as a working fluid of the heat pipe, aligning with environmental concerns and regulations. To assess the heat dissipation effectiveness of the SPHP fin, a constant temperature water bath experiment was conducted to compare its heat transfer characteristics with those of a conventional solid aluminum fin. Furthermore, a test rig was constructed to simulate actual heat dissipation from high-power chips and to investigate the impact of different fin types, locations, and heat fluxes of the chips on cooling performance. Additionally, a simplified method was devised for analyzing the heat transfer of the cooling fin, replacing complex evaporation, condensation, and two-phase flow processes in heat pipes with a virtual solid of high thermal conductivity. Validated by experiments, this method aids in selecting the optimal SPHP fin placement based on chip location and heat flux. The study demonstrates that the SPHP fin significantly outperforms traditional aluminum fins, reducing the temperature of a 25 W heat source by 10 °C to 20 °C depending on the chip’s location.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":"50 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225504","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

An improved federated learning method based on MF1-FedAvg and MSRANet for machinery fault diagnosis 基于 MF1-FedAvg 和 MSRANet 的改进型联合学习方法用于机械故障诊断

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0806-5

Xiuyan Liu, Chunqiu Pang, Tingting Guo, Donglin He

{"title":"An improved federated learning method based on MF1-FedAvg and MSRANet for machinery fault diagnosis","authors":"Xiuyan Liu, Chunqiu Pang, Tingting Guo, Donglin He","doi":"10.1007/s12206-024-0806-5","DOIUrl":"https://doi.org/10.1007/s12206-024-0806-5","url":null,"abstract":"Current fault detection methods for rolling bearings suffer from insufficient data, which limits the generalizability of the models. Typically, conventional approaches train models with a significant amount of labeled data to improve reliability. However, centralized training poses potential risks of data privacy leakage. To address this issue, we propose a federated learning-based fault diagnosis model. In this method, fault diagnosis models for different clients are collaboratively trained by multiple entities with distinct fault characteristics, eliminating the need for third-party aggregation and thereby reducing the risk of data leakage. Specifically, we design a multiscale residual neural network with the ability to perform direct feature extraction from fault data. This proposed network integrates attention units for various scales, emphasizing key features of bearing faults and enhancing the fault recognition capability of local models. Moreover, to address the inherent problem in traditional federated learning frameworks—disparities in client contributions, leading to suboptimal model quality and prolonged training times—this research introduces an innovative weighted strategy based on multiclass F1 scores. This strategy assigns higher weight to high-quality local clients, thereby enhancing both model quality and training speed. Experiments were conducted on two authentic bearing datasets, and the results demonstrate that the proposed method can achieve an average reduction of approximately 15 % in training iterations compared to the federated averaging algorithm, coupled with an average enhancement of approximately 5 % in fault diagnosis accuracy. The experimental results indicate that the proposed method exhibits outstanding accuracy and robustness.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":"61 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225533","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

Multi objective optimization of parameters during FSW of AZ80A - AZ31B Mg alloys using grey relational analysis 利用灰色关系分析法对 AZ80A - AZ31B 镁合金 FSW 过程中的参数进行多目标优化

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0832-3

J. Gunasekaran, P. Sevvel, I. John Solomon, J. Vasanthe Roy

{"title":"Multi objective optimization of parameters during FSW of AZ80A - AZ31B Mg alloys using grey relational analysis","authors":"J. Gunasekaran, P. Sevvel, I. John Solomon, J. Vasanthe Roy","doi":"10.1007/s12206-024-0832-3","DOIUrl":"https://doi.org/10.1007/s12206-024-0832-3","url":null,"abstract":"We attempted to optimize the process-based parameters during friction stir welding of AZ80A - AZ31B Mg alloys with the objective of enhancing the mechanical properties of the fabricated joints. A response surface method based grey relational analysis was employed using three factors and three distinctive levels. A central composite design based multi-objective numerical model using the technique of grey relational analysis was formulated for optimizing the tool dependent parameters, namely tool’s rotational speed, its speed of traverse and geometry of the pin. Grey relational grade was determined for all the responses: tensile strength and elongation percentage. Analysis of variance was employed for attaining grey relational grade to determine the most influential parameter of the FSW process. It was observed that the geometry of the tool pin had a greater impact in ascertaining the quality of the fabricated Mg alloy joints, and the tool possessing tapered cylindrical pin geometry exhibited larger values of grey relational grade. Optimized process parameter settings based on the attained GRG values were recorded to be 1100 rpm rotational speed, speed of traverse of 1.5 mm/sec and a tool with taper cylindrical pin geometry. The anticipated values were validated through confirmation investigational runs performed during employment of optimized parameter combinations, which exhibited a perfect agreement with the investigational run values and the confirmatory joint exhibited a tensile strength of 260.42 MPa and elongation percentage of 6.53.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":"62 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225486","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

Cooling benefit evaluation of a central processing unit using thermal interface materials with hybrid additives 使用含混合添加剂的热界面材料的中央处理器冷却效益评估

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0846-x

Chia Cheng, Tun-Ping Teng, Chii-Rong Yang

{"title":"Cooling benefit evaluation of a central processing unit using thermal interface materials with hybrid additives","authors":"Chia Cheng, Tun-Ping Teng, Chii-Rong Yang","doi":"10.1007/s12206-024-0846-x","DOIUrl":"https://doi.org/10.1007/s12206-024-0846-x","url":null,"abstract":"In this study, the atmospheric plasma (APP) surface modification technology was used to modify the surface of additive materials and mix them into the commercial thermal interface material (base-TIM). This technology allows for the preparation of a hybrid additives thermal interface material (HA-TIM) to improve the heat conduction performance of the base-TIM. The additives selected for HA-TIM include aluminum nitride (AlN), multi-walled carbon nanotubes (MWCNTs), and graphene flakes (GNFs) with different proportions. Additives with different sizes, shapes, and high thermal conductivity were expected to achieve a synergistic effect to produce an HA-TIM with high heat dissipation performance. After the preparation of the HA-TIM with different configuration ratios was completed, heat dissipation performance experiments would be carried out under different heating power and ambient temperature to determine the optimal configuration ratio of the HA-TIM. The results show that the HA-TIM prepared by adding 1 wt% GNFs and 1 wt% MWCNTs to the base-TIM has the best heat conduction performance. In the optimum configuration of the HA-TIM at the heating power of 50 W, 100 W, and 150 W, the heater surface temperature under the ambient temperature of 25 °C is 1.0 °C, 3.0 °C, and 4.2 °C lower than those of base-TIM, and the heater surface temperature under the ambient temperature of 30 °C is 1.1 °C, 3.2 °C, and 6.3 °C lower than those of base-TIM, respectively. Furthermore, the results show that HA-TIM has a better heat dissipation performance under high ambient temperature and heating power.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":"10 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225487","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

Modelling and control of moving beam in fatigue testing 疲劳试验中移动横梁的建模与控制

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0803-8

Wenang Jia, Chaojie Zhang, Zhanshang Li, Zeji Chen, Sheng Li

引用次数: 0

Study on anthropomorphic hand with biological and kinematic characteristics of the human hand 研究具有生物学和运动学特征的拟人手

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0840-3

Shuai Ma, Haoyi Qin, Jiafeng Song, Kejun Wang, Shucai Xu

引用次数: 0