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Bulletin of the Polytechnic Institute of Iași. Machine constructions Section最新文献

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Cylinder Head Analysis from Thermal Point of View Using Finite Element Method (FEM) of a Spark Ignition Engine by Using Zonal Cooling Principle 基于区域冷却原理的火花点火发动机气缸盖热分析的有限元方法
Bulletin of the Polytechnic Institute of Iași. Machine constructions Section Pub Date : 2021-03-01 DOI: 10.2478/bipcm-2021-0003
T. Ulian, A. I. Donţu
{"title":"Cylinder Head Analysis from Thermal Point of View Using Finite Element Method (FEM) of a Spark Ignition Engine by Using Zonal Cooling Principle","authors":"T. Ulian, A. I. Donţu","doi":"10.2478/bipcm-2021-0003","DOIUrl":"https://doi.org/10.2478/bipcm-2021-0003","url":null,"abstract":"Abstract In this paper, it is in focus a detailed analysis of the temperature distribution in the cylinder head. For this scope is build up a tree-dimensional (3D) model using Catia V5. The thermal analysis was performed using 3D finite element method, Ansys Workbench 16.1.","PeriodicalId":244525,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Machine constructions Section","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124701537","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
Aspects Regarding the Dynamic Behavior of a Hydraulic Cylinder 液压缸动力学特性的几个方面
Bulletin of the Polytechnic Institute of Iași. Machine constructions Section Pub Date : 2021-03-01 DOI: 10.2478/bipcm-2021-0005
I. Mardare, I. Tița, A. Zaharia
{"title":"Aspects Regarding the Dynamic Behavior of a Hydraulic Cylinder","authors":"I. Mardare, I. Tița, A. Zaharia","doi":"10.2478/bipcm-2021-0005","DOIUrl":"https://doi.org/10.2478/bipcm-2021-0005","url":null,"abstract":"Abstract This paper deals with hydraulic cylinders with and without end position cushioning. The reduction of the velocity at the end of the stroke is important in order to preserve the structural integrity and to avoid undesirable motion of the load. The mathematical model of such a hydraulic cylinder is shown, as well as the Matlab functional diagram for the system. It is also revealed the role of the working fluid, considering the actual recommendations regarding the biodegradable substances. It was considered both mineral base liquids and vegetable base liquids. The functional diagram offers the possibility to view for the hydraulic system the variation of the speed, flow rate, rate and stroke of the piston, in both cases: with and without end position cushioning. Is also shown a CFD analysis of fluid flow through the supply/outlet connections of the hydraulic cylinder.","PeriodicalId":244525,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Machine constructions Section","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126489749","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: 1
Theoretical Research to Improve the Performance of a Spark Ignition Engine by Using Zonal Cooling Principle 利用区域冷却原理提高火花点火发动机性能的理论研究
Bulletin of the Polytechnic Institute of Iași. Machine constructions Section Pub Date : 2021-03-01 DOI: 10.2478/bipcm-2021-0002
T. Ulian, A. I. Donţu
{"title":"Theoretical Research to Improve the Performance of a Spark Ignition Engine by Using Zonal Cooling Principle","authors":"T. Ulian, A. I. Donţu","doi":"10.2478/bipcm-2021-0002","DOIUrl":"https://doi.org/10.2478/bipcm-2021-0002","url":null,"abstract":"Abstract In this paper, it is in focus an analysis and a theoretical study which will develop a mathematical model that will highlight the influences of the thermal regime of a spark plug engine regarding the engine performance improvement.","PeriodicalId":244525,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Machine constructions Section","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115657909","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
Studies on the Design Models of Horizontal Axis Wind Turbines 水平轴风力机设计模型研究
Bulletin of the Polytechnic Institute of Iași. Machine constructions Section Pub Date : 2021-03-01 DOI: 10.2478/bipcm-2021-0001
E. Năstase
{"title":"Studies on the Design Models of Horizontal Axis Wind Turbines","authors":"E. Năstase","doi":"10.2478/bipcm-2021-0001","DOIUrl":"https://doi.org/10.2478/bipcm-2021-0001","url":null,"abstract":"Abstract The aim of the paper is to present through a contrastive analysis the main models used in the analysis and design of horizontal axis wind turbines. The basis for designing a rotor for a wind turbine, which is the main element of a turbine that extracts energy from the wind, is the propeller theory. This theory incorporates mathematical models that describe the movement of fluid around the propeller. The paper presents three generically named models, model A, model B and model C respectively, used in the analysis and design of the horizontal axis wind turbine’s rotor.","PeriodicalId":244525,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Machine constructions Section","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117263276","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: 1
Functional Analysis of a New Concept of WIM Sensor by Using Failure Mode and Effects Analysis (F.M.E.A.) 基于失效模式与效应分析(fmea)的新型WIM传感器功能分析
Bulletin of the Polytechnic Institute of Iași. Machine constructions Section Pub Date : 2021-03-01 DOI: 10.2478/bipcm-2021-0006
A. I. Donţu, T. Ulian, E. Rakoşi
{"title":"Functional Analysis of a New Concept of WIM Sensor by Using Failure Mode and Effects Analysis (F.M.E.A.)","authors":"A. I. Donţu, T. Ulian, E. Rakoşi","doi":"10.2478/bipcm-2021-0006","DOIUrl":"https://doi.org/10.2478/bipcm-2021-0006","url":null,"abstract":"Abstract The overloading vehicle become an important problem for Europe Union, protecting the environment and increase the traffic safety. WIM or weigh-in-motion systems can monitor the traffic, determine the volume and type of traffic and detect the overload vehicles which are illegal. This paper discusses about applying the Failure Mode and Effect Analysis method for developing a new concept of WIM sensor, designed in PhD thesis from “Gheorghe Asachi” Technical University of Iaşi. FMEA method or also called potential failure modes and effects analysis is a step-by-step approach for determine and identifying all possible failures in a new design, or manufacture process. This new concept of sensor can be used for urban traffic in order to reduce the cars pollution in the cities by providing real-time data traffic, monitoring vehicles and detecting the overloaded trucks. The FMEA method was applied for identification of functional failure risks and preventing failures from an early stage of concept.","PeriodicalId":244525,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Machine constructions Section","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124752049","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
Influence of a Real Estate Construction Area with Mixed Functions - Traffic Study 混合功能房地产建设区域对交通的影响研究
Bulletin of the Polytechnic Institute of Iași. Machine constructions Section Pub Date : 2021-03-01 DOI: 10.2478/bipcm-2021-0007
A. I. Donţu, T. Ulian, E. Rakoşi
{"title":"Influence of a Real Estate Construction Area with Mixed Functions - Traffic Study","authors":"A. I. Donţu, T. Ulian, E. Rakoşi","doi":"10.2478/bipcm-2021-0007","DOIUrl":"https://doi.org/10.2478/bipcm-2021-0007","url":null,"abstract":"Abstract Traffic studies are important because these provide significant information about traffic flows and traffic mobility in the area of study. Also, these studies can help to fluidize the traffic considering the actual number of cars and of the future cars which is estimated to increase due to considering traffic signals, roundabout or other traffic solutions. Traffic impact studies are important because the governmental agencies require them when a new building is developed as this can generate the increase of car traffic or can change the existing traffic paths. In this paper it will see how a new real estate construction area with mixed functions in the Miroslava village influence the traffic flow. This new building will lead to an increased the number of vehicles in the area and will change the existing traffic patterns, so it is required a traffic study.","PeriodicalId":244525,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Machine constructions Section","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126901592","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
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