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Selection of Bridge Crane Beam Optimization Parameters 桥式起重机梁优化参数的选择
Acta Mechanica Slovaca Pub Date : 2023-03-24 DOI: 10.21496/ams.2023.014
J. Kulka, Marián Siman, Lucia Zulová, M. Virostko, M. Kačír
{"title":"Selection of Bridge Crane Beam Optimization Parameters","authors":"J. Kulka, Marián Siman, Lucia Zulová, M. Virostko, M. Kačír","doi":"10.21496/ams.2023.014","DOIUrl":"https://doi.org/10.21496/ams.2023.014","url":null,"abstract":": This paper is focused on the suitability of the selection of the parameters of the supporting structure of the bridge crane for the needs of cross-section optimization. The cross section of the beam is analysed in terms of its rigidity and dimensions with respect to the span of the crane. When optimizing to reduce overall weight, recommendations are given to address the issue of cross-sectional stability. An iterative procedure for the design of the cross-section of the beam at the specified load capacity of the crane and its span is proposed. In the article, only a theoretical analysis of the issue for the selection of suitable cross-section parameters of the crane girder for optimization needs is made, with the indication of another possible procedure for the optimization process itself aimed at minimizing the weight of the bridge crane girder.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129699509","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
Experimental Study of the Impact of Notches Made in the Front Edge of Adherends on the Properties of Static and Fatigue Strength of Adhesive Joints 粘接件前缘开槽对粘接接头静强度和疲劳强度影响的实验研究
Acta Mechanica Slovaca Pub Date : 2023-03-24 DOI: 10.21496/ams.2023.010
A. Kubit, W. Zielecki, Wojciech Berezowski, R. Perłowski, Katarzyna Łabno, T. Katrňák
{"title":"Experimental Study of the Impact of Notches Made in the Front Edge of Adherends on the Properties of Static and Fatigue Strength of Adhesive Joints","authors":"A. Kubit, W. Zielecki, Wojciech Berezowski, R. Perłowski, Katarzyna Łabno, T. Katrňák","doi":"10.21496/ams.2023.010","DOIUrl":"https://doi.org/10.21496/ams.2023.010","url":null,"abstract":": This paper presents the effect of simple structural changes consisting in making notches on the edge of adherends on the static and fatigue properties of adhesive joints. The study is based on the set of experimental static strength tests of the single lap shear adhesive joints. It has been shown that a slight increase in load capacity is possible by using adhesive-filled notches. However, this structural modification leads to an increase in the standard deviation of test results. Based on the fatigue strength tests done at the limit number of cycles equal to 2×10 6 , it was shown that the use of notches on the front edge of adherends, which are filled with adhesive, can significantly increase the fatigue lifetime of the joint. The effect is shown in the area of low-cycle fatigue, where for fatigue stress with a maximum value of 11.5 MPa, an increase in the average value of fatigue lifetime by 481.5% was shown for joints with notches. On the basis of fractography analyses using SEM microscopy, it was shown that the positive effect of the notches is caused by the absorption of some energy by the adhesive filling the notches, due to the increased susceptibility of the adhesive in this area to elastic deformations.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116937245","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
Improving the Simulation of a Mobile Robot by imitations of Ultrasonic Sensors 利用超声传感器改进移动机器人的仿真
Acta Mechanica Slovaca Pub Date : 2023-03-24 DOI: 10.21496/ams.2022.020
Maksym Grytsiv, Marek Sukop, Martin Kočan, Dávid Kovaľuk, Dušan Mlinarček
{"title":"Improving the Simulation of a Mobile Robot by imitations of Ultrasonic Sensors","authors":"Maksym Grytsiv, Marek Sukop, Martin Kočan, Dávid Kovaľuk, Dušan Mlinarček","doi":"10.21496/ams.2022.020","DOIUrl":"https://doi.org/10.21496/ams.2022.020","url":null,"abstract":": This article presents imitating the operation of an ultrasonic sensor in a 3D simulation of the Flowcode program to improve the performance and localization of a mobile robot. The main task will be to compare different methods of measuring distance using a simulation model of the sensor and determine the most profitable placement of these sensors to ensure trouble-free passage of obstacles without collisions.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114376469","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
Numerical Modelling of Flow in Fluidic Oscillator 流体振荡器内流动的数值模拟
Acta Mechanica Slovaca Pub Date : 2023-03-24 DOI: 10.21496/ams.2023.019
T. Blejchar, S. Drábková, Václav Janus
{"title":"Numerical Modelling of Flow in Fluidic Oscillator","authors":"T. Blejchar, S. Drábková, Václav Janus","doi":"10.21496/ams.2023.019","DOIUrl":"https://doi.org/10.21496/ams.2023.019","url":null,"abstract":": The systems with fluidic oscillators are intensively studied nowadays because the oscillatory flow can increase heat and mass transfer and decrease energy dissipation. Fluidic oscillators produce an active-type mixing enhancement but in a passive manner as they do not require any moving parts. They convert steady pressurized inlet flow to oscillatory or pulsatile flow at an outlet without the need for external power. In general, there are many types of fluidic oscillators, categorized by the underlying mechanism to create oscillatory output behaviour. The fluidic oscillator with the single feedback loop is analysed in this paper. A numerical simulation of oscillating flow is performed and two approaches for modelling flow, RANS, and LES are applied especially. The results of numerical simulation are compared with experimental measurement. The analysis is focused on pressure drop and oscillation frequency dependent on the inlet conditions. The energy spectrum of oscillating flow is analysed using discrete Fourier transform.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133606558","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
Design of Printing Parameter Settings Methodology for FFF Printing of Waterproof Samples from a Flexible Material 柔性材料防水样品FFF打印参数设置方法设计
Acta Mechanica Slovaca Pub Date : 2023-03-24 DOI: 10.21496/ams.2023.017
J. Suder, Jakub Mlotek, Alan Panec, F. Fojtík
{"title":"Design of Printing Parameter Settings Methodology for FFF Printing of Waterproof Samples from a Flexible Material","authors":"J. Suder, Jakub Mlotek, Alan Panec, F. Fojtík","doi":"10.21496/ams.2023.017","DOIUrl":"https://doi.org/10.21496/ams.2023.017","url":null,"abstract":": 3D printing technology plays a key role in the design of prototypes and final parts. The ability to quickly and easily produce almost any shape using the Fused Filament Fabrication (FFF) method is used in almost every industrial sector, science and research. Materials for the FFF method can be divided into two groups, namely rigid and flexible. Flexible materials, in combination with pneumatics or hydraulics, offer a wide range of applications. However, in the FFF method, where individual fibers are stacked on each other and side by side, the question arises of whether the fibers will bond sufficiently to prevent water or air from passing through. This paper aims to design a methodology for the printing parameters of an FFF printer when printing from flexible materials to ensure that the filaments bond sufficiently for the printed part's water and air tightness. The proposed methodology is verified on printed samples by two tests, namely waterproof and airtightness tests. Two of the most commonly used highly flexible materials, namely TPU 30D and TPE 88, were selected for testing. The results of the work are intended to help the designers and technologists to calibrate the printing parameters for the printing of flexible materials for use in pneumatics or hydraulics.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131357240","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
Design of an Experimental Device for Remote Monitoring of Variables Through the Cloud Services 基于云服务的变量远程监测实验装置的设计
Acta Mechanica Slovaca Pub Date : 2022-12-15 DOI: 10.21496/ams.2023.012
Ivan Lesiv
{"title":"Design of an Experimental Device for Remote Monitoring of Variables Through the Cloud Services","authors":"Ivan Lesiv","doi":"10.21496/ams.2023.012","DOIUrl":"https://doi.org/10.21496/ams.2023.012","url":null,"abstract":": The article focuses on testing and verifying the proposed method for the real-time monitoring of remote experimental devices through the Cloud principle. This concept interconnects an individual Siemens product into one functional unit to prove the possibilities of control and monitoring such automated workplaces. In the next part, the article tests the connection, visualization, and accessibility of different devices.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114748720","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 Driving Cycles on Emission Parameters of Vehicles 行驶周期对车辆排放参数的影响
Acta Mechanica Slovaca Pub Date : 2022-12-15 DOI: 10.21496/ams.2022.012
Matúš Lavčák, P. Tarbajovský, M. Kopas, M. Puškár
{"title":"Influence of Driving Cycles on Emission Parameters of Vehicles","authors":"Matúš Lavčák, P. Tarbajovský, M. Kopas, M. Puškár","doi":"10.21496/ams.2022.012","DOIUrl":"https://doi.org/10.21496/ams.2022.012","url":null,"abstract":": The vehicle emissions tests, which are performed using the Portable Emissions Measurement Systems (PEMS), indicate that the diesel cars produce several times more NOx emissions on the road than during certification realised according to the methodology New European Driving Cycle (NEDC). This fact initiated the infamous \"dieselgate\" affair. It is a well-known reality that the current emission limits are very strict and therefore a serious problem arises for the motor car producers to meet the demanding emission requirements. The main task of the presented research work was testing of 10 passenger cars with regard to true values of their exhaust gas emissions. These cars were equipped with the diesel engines and gasoline engines that officially meet the Euro 4-6 standards. Based on the measured results it was found that the real NOx emissions of the diesel engines significantly exceed the values measured by NEDC. The results obtained using the NEDC cycle also contradict the findings from two alternative driving cycles: CADC (Common Artemis Driving Cycle; Artemis - Assessment and Reliability of Transport Emission Models and Inventory Systems) and WLTC (Worldwide harmonized Light vehicles Test Cycle).","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125307274","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
Monitoring the Performance of the Drive Mechanisms During CNC Milling 数控铣削过程中驱动机构性能的监测
Acta Mechanica Slovaca Pub Date : 2022-12-15 DOI: 10.21496/ams.2022.019
M. Demko, Peter Ižol, M. Vrabeľ, Jozef Brindza, J. Džugan
{"title":"Monitoring the Performance of the Drive Mechanisms During CNC Milling","authors":"M. Demko, Peter Ižol, M. Vrabeľ, Jozef Brindza, J. Džugan","doi":"10.21496/ams.2022.019","DOIUrl":"https://doi.org/10.21496/ams.2022.019","url":null,"abstract":": The article deals with a monitoring system designed for the needs of a specific production plant. Its primary purpose is to provide online information about ongoing production processes at monitored workplaces. The system will make it possible to monitor the usability of the machines and the load on individual machine elements to increase production efficiency and prevent machine breakdowns. Furthermore, it will allow to monitor the load on the tool and predict its wear in order to prevent irreversible damage and the production of scrap. To test the applicability of the system on a milling machine, a sample was designed, the elements of which were produced in two ways - HPC and trochoidal milling. With these methods of milling, different manifestations of the tool load were assumed. The experiments proved the functionality of the system. The method of transmission, recording and storage of data has proven to be fully functional. The additional results were knowledge of machine load during both milling methods.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116516760","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
Combined Effect of Build Orientation and Energy Density on Density and Mechanical Properties of Selectively Laser Melted Co-Cr-W-Si 构筑取向和能量密度对选择性激光熔化Co-Cr-W-Si密度和力学性能的联合影响
Acta Mechanica Slovaca Pub Date : 2022-12-15 DOI: 10.21496/ams.2023.016
{"title":"Combined Effect of Build Orientation and Energy Density on Density and Mechanical Properties of Selectively Laser Melted Co-Cr-W-Si","authors":"","doi":"10.21496/ams.2023.016","DOIUrl":"https://doi.org/10.21496/ams.2023.016","url":null,"abstract":"","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125390508","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
Collection and Separation of Municipal Waste by Semi-underground Containers - a Case Study 以半地下容器收集及分类都市废物-个案研究
Acta Mechanica Slovaca Pub Date : 2022-12-15 DOI: 10.21496/ams.2022.017
Alžbeta Nováková, K. Pastor, Miroslava Badidová, M. Badida
{"title":"Collection and Separation of Municipal Waste by Semi-underground Containers - a Case Study","authors":"Alžbeta Nováková, K. Pastor, Miroslava Badidová, M. Badida","doi":"10.21496/ams.2022.017","DOIUrl":"https://doi.org/10.21496/ams.2022.017","url":null,"abstract":"The paper deals with the issue of collection and separation of municipal solid waste. The latest trends in the subject area are presented. Attention is focused on the possibility of applying semi-underground containers in densely populated urban areas. The authors of the paper prepared a study of the feasibility of using such containers in the city district of KVP Košice. The paper also includes computer simulations of container stand design.","PeriodicalId":135905,"journal":{"name":"Acta Mechanica Slovaca","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132059062","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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