Advances in Mechanical Engineering最新文献_第8页

Design and test of liquid sloshing piezoelectric energy harvester 液体滑动压电能量收集器的设计与测试

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-05-02 DOI: 10.1177/16878132241248999

Dong Jing, Shuaizhao Hu, Yang Nan, Chicheng Ma, Zhongwei Zhang, Mingyu Shao, Sujuan Shao

{"title":"Design and test of liquid sloshing piezoelectric energy harvester","authors":"Dong Jing, Shuaizhao Hu, Yang Nan, Chicheng Ma, Zhongwei Zhang, Mingyu Shao, Sujuan Shao","doi":"10.1177/16878132241248999","DOIUrl":"https://doi.org/10.1177/16878132241248999","url":null,"abstract":"The energy harvester based on the piezoelectric effect can convert the vibration energy in the environment into electricity to power the network nodes. In order to broaden the effective frequency bandwidth of the piezoelectric energy harvester and reduce the resonant frequency of the system, a liquid slosh-type piezoelectric energy harvester is proposed in this paper. Based on the theory of the piezoelectric effect, the mechanical model and electromechanical coupling model of the piezoelectric energy harvester were established, and the dynamic characteristics of the liquid slosh piezoelectric energy harvester were analyzed. Based on theoretical model and experimental test, the liquid slosh piezoelectric energy harvester is studied. By making a prototype and building a vibration experiment platform, the energy capture characteristics of the piezoelectric energy harvester were tested experimentally. The experimental results show that when the external excitation frequency is close to the first resonant frequency, the maximum output power of the liquid sloshing piezoelectric energy harvester is 0.068 mW, and the optimal matched impedance is 440 kΩ. When the external excitation frequency is close to the second resonant frequency, the maximum output power of the liquid sloshing piezoelectric energy harvester is 0.178 mW, and the optimal matching load resistance is 600 kΩ. Compared with the traditional cantilever beam piezoelectric energy harvester, the liquid slosh piezoelectric energy harvester has a lower resonant frequency and achieves two resonant peaks in the range of 1–20 Hz, which greatly widens the effective frequency bandwidth and improves the energy capture efficiency of the piezoelectric energy harvester.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140830384","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

Nonlinear analysis model of the progressive damage of aluminum–wood sandwich structures under high-speed impact conditions 高速冲击条件下铝木夹层结构渐进式损坏的非线性分析模型

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-05-02 DOI: 10.1177/16878132241236565

Yan Zhang, Shusen Li

{"title":"Nonlinear analysis model of the progressive damage of aluminum–wood sandwich structures under high-speed impact conditions","authors":"Yan Zhang, Shusen Li","doi":"10.1177/16878132241236565","DOIUrl":"https://doi.org/10.1177/16878132241236565","url":null,"abstract":"The impact responses of various protective structures composed of 2A12 aluminum alloy and wood laminates were studied experimentally. The experiments were conducted using different impact energies. By varying the sandwich material thickness and using two different bullet shapes, the effects of the sandwich material’s damage process and the core layer thickness on the protective performance were studied. The multilayer structure’s core layer failure condition was determined using the improved 3D Hashin criterion and a finite element model was established using Abaqus software. Tensile and three-point bending tests were conducted and the progressive damage model was verified statically. The model was then verified dynamically using the Hopkinson bar test. The mechanical properties of the materials under high dynamic strain rates were obtained through action loading testing of the specimens at different loading rates. The loading waveform was analyzed and a stress-strain relationship diagram was drawn at various strain rates. By verifying the experimental data, a numerical model that could capture the deformation and failure details during crushing was established, and the composite target plate impact failure mode and the trajectory change law were described. This study could lead to use of a new impact damage prediction method for laminates.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140830223","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

Research on distortion in boring process of large-size main bearing holes in marine diesel engine body 船用柴油机机体大尺寸主轴承孔镗孔过程中的变形研究

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-04-29 DOI: 10.1177/16878132241241466

Dongyue Qu, Jiyuan Han, Yong Zhan, Hongyi Zhang, Jian’an Xu

引用次数: 0

Fault diagnosis of pump truck waterproof valves using multi-sensor high-dimensional time-domain feature expansion map 利用多传感器高维时域特征扩展图诊断泵车防水阀故障

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-04-29 DOI: 10.1177/16878132241245894

Rui Zhang, Jiyan Yi, Hanlin Guan, Yao Xiao, Wangfang Tao, Yan Ren

{"title":"Fault diagnosis of pump truck waterproof valves using multi-sensor high-dimensional time-domain feature expansion map","authors":"Rui Zhang, Jiyan Yi, Hanlin Guan, Yao Xiao, Wangfang Tao, Yan Ren","doi":"10.1177/16878132241245894","DOIUrl":"https://doi.org/10.1177/16878132241245894","url":null,"abstract":"The master cylinder of most pump trucks is equipped with a waterproof valve, whose purpose is to prevent water from the tank from entering the master cylinder. Once waterproof valve fails to failure, the waterproof valve at the main cylinder can only be supported by a BS seal (this seal is very easy to fail), which results in oil emulsification and pollution of the hydraulic system. Therefore, a fault diagnosis method combining a multi-sensor high-dimensional time-domain feature expansion map (MHTFEM) with an attentional convolutional capsule network (ACCN) is proposed. In this method, the raw vibration signals acquired by all sensors are first preprocessed to generate a high-dimensional feature matrix. Then the different high-dimensional feature matrices are stitched, expanded and generated into grayscale images, followed by randomly dividing the training set and the testing set. Finally, the training set is brought into the ACCN for training and the testing set is brought into the network model for fault type identification. A test bench was built to confirm the effectiveness of the method for waterproof valve fault diagnosis. This provides a method to achieve intelligent fault diagnosis of construction machinery to ensure its reliability.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140830096","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

Control and analysis of floating ability of aeronautical cylindrical spiral groove gas seal based on F-K model 基于 F-K 模型的航空圆柱螺旋槽气密封浮动能力控制与分析

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-04-29 DOI: 10.1177/16878132241236591

Junhua Ding, Shurong Yu, Junjie Lu, Xuexing Ding

{"title":"Control and analysis of floating ability of aeronautical cylindrical spiral groove gas seal based on F-K model","authors":"Junhua Ding, Shurong Yu, Junjie Lu, Xuexing Ding","doi":"10.1177/16878132241236591","DOIUrl":"https://doi.org/10.1177/16878132241236591","url":null,"abstract":"The slip flow phenomenon caused by the gas floating seal in ultra-thin gas films and high-altitude rarefied gas environments occurs frequently. This study represents the first attempt to calculate the gas film floating force by considering the coupling relationship among the slip flow effect, the surface micro-grooves, and the eccentricity using a high-precision eight-node finite difference method based on the linearized Boltzmann equation for a spiral-grooved cylindrical gas seal. Furthermore, the influence of slip flow on the operational and groove parameters of the spiral-grooved cylindrical gas seal is investigated and discussed. Results show that the velocity gradient of the lubrication gas is reduced and the effect of the fluid hydrodynamic pressure is weakened because of slip flow, particularly in high-speed, low-pressure, and high-eccentricity fields. However, increases in groove depth, number, and length improve the gas film floating force, which strengthens the slip flow response in the grooves. Therefore, the slip flow reduces the gas film floating force, but when the groove depth exceeds 32 μm and the groove length is greater than 45 mm, the slip flow may become negligible. The results presented here provide a theoretical basis to broaden the application scope of dynamic seals in the aerospace field.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140829907","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

Intelligent multi-fault identification and classification of defective bearings in gearbox 齿轮箱轴承故障的多故障智能识别与分类

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-04-27 DOI: 10.1177/16878132241246673

Ali Damou, Azeddine Ratni, Djamel Benazzouz

{"title":"Intelligent multi-fault identification and classification of defective bearings in gearbox","authors":"Ali Damou, Azeddine Ratni, Djamel Benazzouz","doi":"10.1177/16878132241246673","DOIUrl":"https://doi.org/10.1177/16878132241246673","url":null,"abstract":"Bearing faults in gearbox systems pose critical challenges to industrial operations, needing advanced diagnostic techniques for timely and accurate identification. In this paper, we propose a new hybrid method for automated classification and identification of defective bearings in gearbox systems with identical rotating frequencies. The method successfully segmented the signals and captured specific frequency components for deeper analysis employing three distinct signal processing approaches, ensemble empirical mode decomposition EEMD, wavelet packet transform WPT, empirical wavelet transform EWT. By decomposing vibration signals into discrete frequency bands using WPT, relevant features were extracted from each sub-band in the time domain, enabling the capturing of distinct fault characteristics across various frequency ranges. This extensive set of features is then served as inputs for machine learning algorithm in order to identify and classify the defective bearing in the gearbox system. Random forest RF, decision tree DT, ensemble tree ET classifiers showcased a notable accuracy in classifying different fault types and their localizations. The new approach shows the high performance of the diagnostic gearbox with a minimum of accuracy (Min = 99.95 %) and higher stability (standard deviation = 0.1).","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140811590","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

Equivalent method for assessment of bearings at operational types of loadings 轴承工作载荷评估等效方法

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-04-27 DOI: 10.1177/16878132241248286

Shuancheng Wang, Shuwei Zhou, Bing Yang, Shiqi Zhou, Shoune Xiao

引用次数: 0

Rounding theory and method for the pitch curves of the variable center distance non-circular gear pair based on working conditions 基于工作条件的变中心距非圆形齿轮副节圆曲线的圆整理论和方法

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-04-20 DOI: 10.1177/16878132241242203

Botao Li, Jiquan Hu, Dingfang Chen

引用次数: 0

An adaptive electropneumatic end effector for constant force robot grinding with steel wire brush 用于钢丝刷恒力机器人打磨的自适应电动气动末端执行器

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-04-20 DOI: 10.1177/16878132241244918

Chosei Rei, Qiang Wang, Xinhua Yan, Liwei Fu, Peng Zhang, Chong Wang

引用次数: 0

Design and performance evaluation of a novel fractional order PID control strategy for vehicle semi-active suspension 用于车辆半主动悬架的新型分数阶 PID 控制策略的设计与性能评估

IF 2.1 4区工程技术

Advances in Mechanical Engineering Pub Date : 2024-04-20 DOI: 10.1177/16878132241241435

Gang Li, Han Xu, Zhiyong Ruan, Qianjie Liu, Yu Gan, Lifan Yu, Wencai Zhu, Guoliang Hu

{"title":"Design and performance evaluation of a novel fractional order PID control strategy for vehicle semi-active suspension","authors":"Gang Li, Han Xu, Zhiyong Ruan, Qianjie Liu, Yu Gan, Lifan Yu, Wencai Zhu, Guoliang Hu","doi":"10.1177/16878132241241435","DOIUrl":"https://doi.org/10.1177/16878132241241435","url":null,"abstract":"The performance of a semi-active suspension depends on the quality of the control algorithm. Considering the limitations of conventional PID controllers within intricate nonlinear systems, such as imprecise parameter tuning and performance deterioration, we introduced a fractional-order PID (FOPID) control strategy for vehicle semi-active suspension, this approach amalgamates fractional-order theory with conventional PID control to enhance both the controllable scope and precision of the suspension system. Research on semi-active suspension control was conducted using a nonlinear dynamic model of a quarter vehicle. Simulations and analyses were performed utilizing random road excitation and impact road excitation as input signals for both FOPID control, Fuzzy-PID control, and conventional PID control strategies. The analysis findings demonstrated that in the presence of random road excitation, the semi-active suspension system controlled by FOPID reduced vehicle body acceleration by 18.9%, in contrast to a 14.7% reduction by the Fuzzy-PID-controlled suspension, and a 12% reduction achieved by the PID-controlled suspension when compared to the passive suspension. In response to impact road excitation, the suspension system under FOPID control effectively mitigated the peak value of vehicle body acceleration by 29.4%, surpassing the 25.2% reduction achieved by Fuzzy-PID-controlled suspension, and the 24.6% reduction achieved by the PID-controlled suspension. The simulation outcomes substantiated that ride comfort and handling stability of the semi-active suspension system were effectively improved by the implementation of FOPID control.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140627264","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