Vibrations in Physical Systems最新文献_第4页

Numerical and Experimental Analyses of a Lighting Pole in Terms of Passive Safety of 100HE3 class 100HE3级灯杆被动安全性的数值与实验分析

Vibrations in Physical Systems Pub Date : 2020-01-01 DOI: 10.21008/J.0860-6897.2020.3.07

T. Jedliński, J. Buśkiewicz, P. Fritzkowski

{"title":"Numerical and Experimental Analyses of a Lighting Pole in Terms of Passive Safety of 100HE3 class","authors":"T. Jedliński, J. Buśkiewicz, P. Fritzkowski","doi":"10.21008/J.0860-6897.2020.3.07","DOIUrl":"https://doi.org/10.21008/J.0860-6897.2020.3.07","url":null,"abstract":"Nowadays trends related to the road safety make the lighting poles producers meet rigorous requirements that decrease the risk of death and injury of vehicle drivers in case of the impact. New requirements are in force from 1 January 2015, when Road and Bridge Research Institute informed that each pole liable to a direct vehicle impact has to meet Standard PN-EN 12767. The article presents the design of a novel, safe lighting pole. The novelty lies in the pole simplicity, which results in the manufacturing technology the cost of which is comparable to that of the conventional pole. Compared to the conventional poles of thickness 3 mm and greater, this one is made of thin-walled steel sheet of increased strength parameters and specially designed sleeve that is fixed to the base plate. The crash tests carried out on the track for the impact experiments proved that the requirements of the standards in the driver highest safety class and in the high vehicle kinetic energy absorption were satisfied both for the speed impact 35 km/h and 100 km/h. The numerical model for simulations of the vehicle behaviour during and after the impact was implemented in software Ansys LS-Dyna. The simplifications of some elements were of negligible influence on the analysed phenomena. The comparative parameters were ASI, THIV and exit velocity of the vehicle. The numerical results were close to the empirical ones, therefore they confirmed that finite element analysis can be successfully applied at the stage of elaborating of the initial concepts of the road lightning poles. It follows that the number of expensive crash tests can be reduced.","PeriodicalId":38508,"journal":{"name":"Vibrations in Physical Systems","volume":"31 1","pages":"2020307-1-2020307-8"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68248473","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

Minimization of critical flow velocity of aeroelastic energy harvester via delayed feedback control 延迟反馈控制气动弹性能量收集器临界流速的最小化

Vibrations in Physical Systems Pub Date : 2020-01-01 DOI: 10.21008/J.0860-6897.2020.2.25

F. Sarbinowski, R. Starosta

引用次数: 0

Blast Resistance of Sandwich Plate with Auxetic Anti-tetrachiral Core 增塑型抗四手芯夹层板的抗爆破性能

Vibrations in Physical Systems Pub Date : 2020-01-01 DOI: 10.21008/J.0860-6897.2020.3.17

J. Michalski, T. Stręk

引用次数: 7

Vibroacoustic Analysis of the Polish Pharmacy Robot Fablox 波兰药房机器人Fablox的振动声学分析

Vibrations in Physical Systems Pub Date : 2020-01-01 DOI: 10.21008/J.0860-6897.2020.3.12

Wojciech Łapka

{"title":"Vibroacoustic Analysis of the Polish Pharmacy Robot Fablox","authors":"Wojciech Łapka","doi":"10.21008/J.0860-6897.2020.3.12","DOIUrl":"https://doi.org/10.21008/J.0860-6897.2020.3.12","url":null,"abstract":"This paper describes the vibroacoustic analysis of the Polish pharmacy robots Fablox 1 and 2, as a part of research and development work to build an automated, modular pharmacy robot that meets the requirements of the false directive 2011/62 / EU to counteract the illegal distribution of drugs in the European Union. There were undertaken acoustics and vibration measurements of a pharmacy robot under typical working conditions. Point measurements of a one-third octave spectra of a sound pressure levels and RMS values of acceleration were made at measuring points located in the room and at the pharmacy robot. The acoustic tests were divided according to the location of the measurement points into measurements inside room and noise measurements in the near field of the pharmacy robots. The vibration measurements were made directly on the devices. Based on the analysis of the one-third octave spectra of the noise of the Fablox pharmacy robots, the sound components were determined, which are responsible for achieving high noise levels in room. The acoustic measurements in the near field at a distance of 15 cm from the unloading / front side of the pharmacy robot Fablox 1 and Fablox 2 in room, showed that the arithmetically averaged A-sound level on the measuring surface with closed housing for the movement of the head through all three loading modules is higher for the pharmacy robot Fablox 2 (66.9 dB) by 1.7 dB than the equivalent A-sound level for the Fablox 1 (65.2 dB). Due to the fact that the pharmacy robot is mostly used in the working environment in the pharmacy, the noise it generates has a large impact on employees and customers.","PeriodicalId":38508,"journal":{"name":"Vibrations in Physical Systems","volume":"31 1","pages":"2020312-1-2020312-14"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68249100","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

AI-based Method of Vortex Core Tracking as an Alternative for Lambda2 基于人工智能的涡旋核跟踪方法作为Lambda2的备选方案

Vibrations in Physical Systems Pub Date : 2020-01-01 DOI: 10.21008/J.0860-6897.2020.3.19

Maciej Majchrzak, M. Jakubowski, R. Starosta

引用次数: 1

Analysis of Eigenfrequencies of the Foot Prosthesis with Auxetic Component Layer 基于辅助分量层的足假体特征频率分析

Vibrations in Physical Systems Pub Date : 2020-01-01 DOI: 10.21008/J.0860-6897.2020.2.14

Daria Łączna, Filip Dłużniewski, T. Stręk

引用次数: 2

Calculating Extreme Criteria of Eigenvalue Problems of a Medical Robot for Soft Tissue Surgery Using the Multi-objective Optimization 基于多目标优化的软组织手术医疗机器人特征值问题极值准则计算

Vibrations in Physical Systems Pub Date : 2020-01-01 DOI: 10.21008/J.0860-6897.2020.3.06

G. Ilewicz

{"title":"Calculating Extreme Criteria of Eigenvalue Problems of a Medical Robot for Soft Tissue Surgery Using the Multi-objective Optimization","authors":"G. Ilewicz","doi":"10.21008/J.0860-6897.2020.3.06","DOIUrl":"https://doi.org/10.21008/J.0860-6897.2020.3.06","url":null,"abstract":"Medical robots with an instant center of rotation mechanism in a trocar are used for operating a human body or servicing artificial organs. The result of the work is the development of a multicriteria optimization model of a discussed medical robot, considering safety factor, first eigenfrequency and buckling coefficient as a criteria. The article also analyzes two issues of mechanics, the natural frequency and linear buckling. A discrete mesh model of a novel robot design with ten degrees of freedom and ended with a scalpel was developed based on finite element method. For the given loads and supports, a multi-criteria optimization model was evolved, which was solved by using the response surface method and the multi-objective genetic algorithm. The results section shows the Pareto fronts for the criteria and geometrical dimensions of the kinematic chain. The courses of resonant vibrations and buckling strains were also characterized. The solved optimization model gives correct values for the adopted criteria. The values of resonance were defined, which makes it possible to select mechatronic drive systems in terms of the input they generate. Variability of the resonant vibrations phenomena, as well as shapes and directions of buckling, provide information about the displacements taking place in the medical robot system.","PeriodicalId":38508,"journal":{"name":"Vibrations in Physical Systems","volume":"31 1","pages":"2020306-1-2020306-8"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68248443","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

Dynamic Stability of Mechanically and Thermally Loaded Three-Layered Annular Plate with Viscoelastic Core 机械和热载荷粘弹性芯三层环形板的动态稳定性

Vibrations in Physical Systems Pub Date : 2020-01-01 DOI: 10.21008/J.0860-6897.2020.2.23

D. Pawlus

引用次数: 1

Shell-Solid FEM Model of a Violin Resonance Body 小提琴共振体壳-实体有限元模型

Vibrations in Physical Systems Pub Date : 2020-01-01 DOI: 10.21008/J.0860-6897.2020.3.08

A. Kabała, R. Barczewski

引用次数: 1

Optimization of Fundamental Natural Frequency of Structures Using VPL on the Example of Truss Towers 基于VPL的桁架塔结构基本固有频率优化

Vibrations in Physical Systems Pub Date : 2020-01-01 DOI: 10.21008/J.0860-6897.2020.2.29

A. Wirowski

引用次数: 1