4区工程技术

Mechanika Pub Date : 2023-10-18 DOI: 10.5755/j02.mech.33244

Ming ZHAI, Yikui XIE

引用次数: 0

Real-Time Energy Consumption Sensing System in SMT Intelligent Workshop SMT智能车间实时能耗传感系统

4区工程技术

Mechanika Pub Date : 2023-10-18 DOI: 10.5755/j02.mech.32129

Fengque PEI, Zhi LI, Wei DI, Song MEI, Haojie SONG

{"title":"Real-Time Energy Consumption Sensing System in SMT Intelligent Workshop","authors":"Fengque PEI, Zhi LI, Wei DI, Song MEI, Haojie SONG","doi":"10.5755/j02.mech.32129","DOIUrl":"https://doi.org/10.5755/j02.mech.32129","url":null,"abstract":"How to ensure the \"carbon peaking and carbon neutrality\" goal is a crucial problem for China with good performance, low cost and limited time. As a pillar industry, the manufacturing industry need offer more great potential helps. In this paper, for the intelligent workshop, firstly, an energy consumption architecture, based on mutual inductance sensing technology & a multi-granularity production line energy consumption modeling, is put forward. Secondly, the device-level sensing technology demonstrates the detailed implementation for the multi working condition machines whose power is unknown. And then, the research devoted the basic aspects of the proposed multi-granularity production line energy consumption modeling and summarized the implementation elements of 3-matrix (the attribute attributes, power attributes and cumulative timing attributes). Above the 2 sections, the robot and SMT production lines case studies are presented separately. Results show that the architecture can effectively sense and model the energy consumption of the devices and the workshop, which provides an available method for the fine management and control of energy consumption and energy efficiency. Through this study, we hope to provide some reference ideas for future researchers.","PeriodicalId":54741,"journal":{"name":"Mechanika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135824406","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

Modeling of Water Transport through Plasmodesmata in Plant Cell 植物细胞间连丝水分输送的模型研究

4区工程技术

Mechanika Pub Date : 2023-10-18 DOI: 10.5755/j02.mech.32617

Zhipeng TANG, Yongbin ZHANG

引用次数: 0

Design Optimization of a Wafer Dough Blade Using Artificial Neural Network and Monte-Carlo Simulation 基于人工神经网络和蒙特卡罗仿真的圆面片叶片设计优化

4区工程技术

Mechanika Pub Date : 2023-10-18 DOI: 10.5755/j02.mech.32249

Murat MAYDA, Mesut BİTKİN

引用次数: 0

Experimental Evaluation of CNG Substitution Ratio on Exhaust Gas Emissions of Diesel/CNG Dual Fuel Combustion CNG替代率对柴油/CNG双燃料燃烧废气排放影响的实验评价

4区工程技术

Mechanika Pub Date : 2023-10-18 DOI: 10.5755/j02.mech.33638

Neeraj KUMAR, Bharat Bhushan ARORA, Sagar MAJI

{"title":"Experimental Evaluation of CNG Substitution Ratio on Exhaust Gas Emissions of Diesel/CNG Dual Fuel Combustion","authors":"Neeraj KUMAR, Bharat Bhushan ARORA, Sagar MAJI","doi":"10.5755/j02.mech.33638","DOIUrl":"https://doi.org/10.5755/j02.mech.33638","url":null,"abstract":"The addition of Compressed natural gas as a complement to diesel in compression ignition engines in dual-fuel combustion mode is a viable technology for increasing efficiency and lowering emissions. This work investigates the impact of a dual-fuel operating mode on the engine exhaust pollutant emissions of a diesel engine using compressed natural gas as the principal fuel and neat diesel as the pilot fuel. Compressed natural gas was injected into an intake manifold of a single-cylinder diesel test engine under different engine operating parameters, and up to 80% substitution was attained. And diesel fuel was injected after the compressed natural gas air mixture was compressed. The tests were carried out at five different compression ratios ranging from 13:1 to 15:1 in steps of 0.5:1. The experiment study revealed that injecting CNG into diesel engines via dual fuel combustion significantly impacted exhaust gas emissions compared to pure diesel combustion. The Carbon monoxide (CO) and hydrocarbon (HC) emissions were increased, while carbon dioxide (CO2), nitrogen oxide (NOX) and smoke opacity were decreased in dual fuel combustion compared to single diesel fuel.","PeriodicalId":54741,"journal":{"name":"Mechanika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135884399","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

Design and FEM Analysis of Plastic Parts of a Tie-Rod Composite Hydraulic Cylinder 拉杆复合液压缸塑性件设计与有限元分析

4区工程技术

Mechanika Pub Date : 2023-10-18 DOI: 10.5755/j02.mech.31817

Marek LUBECKI, Michal STOSIAK, Mykola KARPENKO, Kamil URBANOWICZ, Adam DEPTUŁA, Rafal CIEŚLICKI

{"title":"Design and FEM Analysis of Plastic Parts of a Tie-Rod Composite Hydraulic Cylinder","authors":"Marek LUBECKI, Michal STOSIAK, Mykola KARPENKO, Kamil URBANOWICZ, Adam DEPTUŁA, Rafal CIEŚLICKI","doi":"10.5755/j02.mech.31817","DOIUrl":"https://doi.org/10.5755/j02.mech.31817","url":null,"abstract":"Due to a number of advantages, such as a high ratio of power transmitted to the weight of the system, the possibility of easy control and the freedom to arrange system elements on the machine, hydrostatic drive is one of the most popular methods of machine drive. The executive elements in such a system are hydraulic cylinders that convert the energy of the pressure of the liquid into the mechanical energy of the reciprocating motion. One of the disadvantages of conventional actuators is their weight, so research is being done to make them as light as possible. The directions of this research include the use of modern engineering materials such as composites and plastics. The paper presents the process of designing, FEM analysis and experimental validation of the base and gland of a composite hydraulic cylinder. The considered elements are made of PET plastic. During the analysis, material non-linearity was taken into account, and the analysis itself was carried out in two steps. The first was the preloading of the tie-rods, and the second was the loading of the cylinder with internal pressure. The numerical calculations were experimentally validated by prototype tests with the use of strain gauges.","PeriodicalId":54741,"journal":{"name":"Mechanika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135824402","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 vibration characteristics and bifurcation control of a class of piecewise constrained systems with dynamic clearances 一类带动态间隙分段约束系统的非线性振动特性及分岔控制

4区工程技术

Mechanika Pub Date : 2023-10-18 DOI: 10.5755/j02.mech.33389

Fei LIU, Shuhui XU, Zhuo TANG, Qingzhen MA

{"title":"Nonlinear vibration characteristics and bifurcation control of a class of piecewise constrained systems with dynamic clearances","authors":"Fei LIU, Shuhui XU, Zhuo TANG, Qingzhen MA","doi":"10.5755/j02.mech.33389","DOIUrl":"https://doi.org/10.5755/j02.mech.33389","url":null,"abstract":"Considering the mass block system under Piecewise nonlinear constraint, the vibration dynamic model of the system is established according to the generalized dissipative Lagrange principle, and the average method is used to solve the amplitude-frequency response of the vibration system. The influence of system parameters on vibration characteristics is analyzed with amplitude-frequency characteristics, phase plane characteristics, frequency characteristics, bifurcation characteristics ,and so on. The results show that: 1) the reverse of the rate of change of Piecewise nonlinear elastic force will destroy the stability of the system and obtain the relationship of the constraint parameters that need to be satisfied when the system is stable at the piecewise critical point. 2) With the increase in the number of nonlinear constraints, the vibration displacement of the system tends to be chaotic, and the frequency composition becomes more complex and variable, prone to resonance behavior. 3) As the static gap decreases and the dynamic gap amplitude and frequency increase, the unstable frequency range of the system will increase, and the vibration behavior will become chaotic and difficult to predict. 4) The design of a differential sliding mode controller can effectively control the bifurcation behavior of the system.","PeriodicalId":54741,"journal":{"name":"Mechanika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135823437","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

Passive Flow Control for Centrifugal Compressors with Bents Intake Manifold 带弯管进气歧管的离心式压缩机被动流量控制

4区工程技术

Mechanika Pub Date : 2023-10-18 DOI: 10.5755/j02.mech.30987

Moustafa MAAMMEUR, Abdallah BENAROUS, Ahmed BETTAHAR, Abdelkarim LIAZID

{"title":"Passive Flow Control for Centrifugal Compressors with Bents Intake Manifold","authors":"Moustafa MAAMMEUR, Abdallah BENAROUS, Ahmed BETTAHAR, Abdelkarim LIAZID","doi":"10.5755/j02.mech.30987","DOIUrl":"https://doi.org/10.5755/j02.mech.30987","url":null,"abstract":"Centrifugal compressors installations often require bents conduits at the intake due to space constraints. The intake bent manifold creates flow distortion affecting unfavorably the global performance of the compressor. The degradation caused by the inadequate inlet conditions due to turbulence and inlet flow disturbance, which negatively affects the flowing fluid through the curved intake manifold. Hence, significant distortions, within presence of single or twin core vortices whirling off center of the impeller intake alter flow incidence angle and consequently the impeller circumferential energy. Furthermore, inadequate bends configurations generate higher incidence angles, which lead to boundary layer separation and stalling. This paper deals with a 3D numerical investigations of dual bends located upstream of the centrifugal compressor. Several bend setting positions at the compressor intake describing various sequences of intake piping are considered. As first results, specific positions of dual bends are identified for fewer flow disturbance at the impeller eye and stable outflow controlling the incidence angel in a passive mode. it is less cumbersome and cost effective compared to additional devices. For practical industrial prediction, this investigation contribute also toward a mathematical correlation to check the adequacy of intermediate manifold configuration in order to predict the corresponding incidence angle at the impeller intake of the centrifugal compressor for enhanced performance and instantaneous control.","PeriodicalId":54741,"journal":{"name":"Mechanika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135884695","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

Study on Motion Mechanism of Suspended Particles in Water Under Ultrasound 超声作用下水中悬浮粒子运动机理的研究

4区工程技术

Mechanika Pub Date : 2023-10-18 DOI: 10.5755/j02.mech.33704

Pu LIU, Yonglie ZHAN, Kailun QUAN, Zhengqiang TANG

{"title":"Study on Motion Mechanism of Suspended Particles in Water Under Ultrasound","authors":"Pu LIU, Yonglie ZHAN, Kailun QUAN, Zhengqiang TANG","doi":"10.5755/j02.mech.33704","DOIUrl":"https://doi.org/10.5755/j02.mech.33704","url":null,"abstract":"Particles in the ultrasonic field by the influence of acoustic radiation force, its motion characteristics will be changed. Based on the simplified ultrasonic cleaning assumption, numerical simulation is used to construct a simulation model of suspended particles in the ultrasonic field in liquid water environment, and to study the law of ultrasonic waves on the motion characteristics of suspended particles in water. The research results show that the ultrasonic arrangement of the array makes the ultrasonic waves produce ultrasonic focusing on the propagation path. The alternating fluctuations of ultrasonic positive and negative sound pressure are in the horizontal line parallel to the bottom, and the vibration amplitude of suspended particles in the middle region is the largest. For the vertical position perpendicular to the bottom, the region with larger vibration amplitude of suspended particles is at 1/5 from the bottom. The particles in the high sound pressure area are pushed to the gathering area, and the particle vibration amplitude in the low sound pressure area is small, which proves that the gathering area of the particles is often the low sound pressure area. The research results will contribute to the study of particle motion in the ultrasonic field.","PeriodicalId":54741,"journal":{"name":"Mechanika","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135883055","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 Bionic Hierarchical Optimization of Wing Based on PLSR and PSO 基于PLSR和粒子群算法的机翼仿生分层优化研究

4区工程技术

Mechanika Pub Date : 2023-10-18 DOI: 10.5755/j02.mech.33329

Xiaoxin ZHANG, Qi WANG

引用次数: 0

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