Mechanical Testing and Diagnosis最新文献

ANALYTIC MODEL OF THE SUBSYSTEM HEAD-NECK-SPINE MOVEMENT BIOMECHANICS 头颈脊柱运动子系统的生物力学解析模型

Mechanical Testing and Diagnosis Pub Date : 2021-04-12 DOI: 10.35219/mtd.2021.1.03

Valentin Amortila, E. Mereuta, M. Novetschi, M. Rus, S. Vereşiu

{"title":"ANALYTIC MODEL OF THE SUBSYSTEM HEAD-NECK-SPINE MOVEMENT BIOMECHANICS","authors":"Valentin Amortila, E. Mereuta, M. Novetschi, M. Rus, S. Vereşiu","doi":"10.35219/mtd.2021.1.03","DOIUrl":"https://doi.org/10.35219/mtd.2021.1.03","url":null,"abstract":"Biomechanical modeling with the help of analytical mechanics together with the application of dedicated IT resources and mechanical simulations lead to a higher accuracy of the biomechanical model. From an analytical point of view, this article develops the equation of motion of the human head in a biomechanical system with three degrees of freedom using the Lagrange equations of the second case. It has been considered that this biomechanical subsystem consists of 3 anatomicalelements: the head, the cervical region and the rest of the spine (considered as being a single element consisting of the thoracic region, lumbar region, sacral region and coccygeal region).The forces which stress the head and spine during normal movements or when activities in the workplace are performed make biomechanical modeling different. Therefore, the movement of the subsystem was analyzed in the sagittal plane taking into consideration joints of cylindroid type, and the subsystem as a triple inverted pendulum.The main purpose of this model was to obtain the differential equations of motion of the mechanical subsystem considered to be in the matrix-analytical form.","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125705466","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

TRIBOLOGICAL BEHAVIOR OF COARSE RAPESEED OIL TESTED ON FOUR BALL TESTER 在四球试验机上试验粗菜籽油的摩擦学性能

Mechanical Testing and Diagnosis Pub Date : 2021-04-12 DOI: 10.35219/mtd.2021.1.01

T. F. Ionescu, D. Guglea, C. Georgescu, P. Alexandru, L. Deleanu

引用次数: 0

AN EVALUATION OF THE POTENTIAL IMPACT OF EXTRACTING MARINE RENEWABLE ENERGY IN THE COASTAL ENVIRONMENT OF THE BLACK SEA 对黑海沿岸环境中提取海洋可再生能源的潜在影响的评价

Mechanical Testing and Diagnosis Pub Date : 2021-04-12 DOI: 10.35219/mtd.2021.1.02

Laura Zburlea, E. Rusu

引用次数: 1

FLAMMABILITY TESTS ON HOT SURFACE FOR CASTOR OIL 蓖麻油热表面易燃性试验

Mechanical Testing and Diagnosis Pub Date : 2021-01-12 DOI: 10.35219/MTD.2020.4.04

L. Șolea, L. Deleanu

引用次数: 1

EFFECTS OF LOW-FREQUENCY NOISE ON CREWS OF RIVER VESSELS ON THE DANUBE 多瑙河上船舶船员低频噪声的影响

Mechanical Testing and Diagnosis Pub Date : 2019-11-08 DOI: 10.35219/mtd.2019.3.02

L. Rusu, E. Rusu, Dunărea de Jos

引用次数: 1

INTRODUCTION THE COASTAL AT RISK INDEX IN THE ROMANIAN BLACK SEA AREA 介绍罗马尼亚黑海地区沿海危险指数

Mechanical Testing and Diagnosis Pub Date : 2019-11-08 DOI: 10.35219/mtd.2019.3.01

Anton Catalin, E. Rusu, Dunărea de Jos

{"title":"INTRODUCTION THE COASTAL AT RISK INDEX IN THE ROMANIAN BLACK SEA AREA","authors":"Anton Catalin, E. Rusu, Dunărea de Jos","doi":"10.35219/mtd.2019.3.01","DOIUrl":"https://doi.org/10.35219/mtd.2019.3.01","url":null,"abstract":"The recent theory of the coastal risk index (C@R) represents a theory, whose approach is based on a series of indicators targeting natural and anthropic processes. These indicators aim to assess the risk of coastal areas exposed to natural hazards (sea level rise, storms, floods etc.). Also, the coastal risk index assesses the degradation of coastal resources and the factors that favor this phenomenon. The C@R index was developed with a special emphasis on coastal and environmental risks and is based on the World Risk Index concept [1]. At the level of the Romanian coastal area, a master plan for protecting the coastal area has been adopted since 2011, a document that has generated several shore protection solutions. During 2014-2017, hard type protection works were carried out in the areas considered the most vulnerable in terms of coastal erosion [2]. The present paper aims to analyze the introduction of a modern risk assessment system by applying the C@R index, at the level of the Romanian coastal area. The purpose of this tool is to help and inform decision makers at all levels about the existing risks, so that they can find solutions to reduce these risks.","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128024957","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

EVALUATING SEIZURE ON FOUR BALL TESTER FOR RAPESEED OIL 评价菜籽油四球试验仪的检出率

Mechanical Testing and Diagnosis Pub Date : 2019-11-08 DOI: 10.35219/mtd.2019.3.03

IonescuTraian Florian Ionescu, L. Șolea, D. Guglea, C. Georgescu, L. Deleanu, Dunărea de Jos

{"title":"EVALUATING SEIZURE ON FOUR BALL TESTER FOR RAPESEED OIL","authors":"IonescuTraian Florian Ionescu, L. Șolea, D. Guglea, C. Georgescu, L. Deleanu, Dunărea de Jos","doi":"10.35219/mtd.2019.3.03","DOIUrl":"https://doi.org/10.35219/mtd.2019.3.03","url":null,"abstract":"This paper presents a tribological characterization in seizure regime for two lubricants (rapeseed oil and rapeseed oil additivated with 1%wt TiO2). Tests were done on a four-ball tester, in the load range at the tester shaft 500...900 N, in step of 50 N, for 60 seconds and with a rotational speed of 1400 rpm (equivalent to a sliding speed of 0.53 m/s). There were discussed the average value of friction coefficient, the wear scar diameter (WSD), the flash temperature parameter and several texture 3D parameters. Till 600 N, the influence of additivation is not obvious, the friction coefficient is lower for the neat oil, WSD is similar, but after this load, the slope for WSD is smaller for the additivated lubricant and for 900 N, this parameter is also smaller. Sa seems to be quite insensitive to the load increase, but other parameters, like St has a significant increase, meaning two processes: additive is pressed on the surface and developed high local peaks or/and the adhesive and abrasive wear is more intense. FTP is almost the same at 900 N, but the additive makes this parameter to evolve with a plateau with low slope, meaning the additivated lubricant has a better behavior under high loads. .","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114991646","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

BLACK SEA NAVAL ACCIDENTS – INTERVENTION MANAGEMENT 黑海海军事故干预管理

Mechanical Testing and Diagnosis Pub Date : 2019-07-15 DOI: 10.35219/mtd.2019.2.02

V. Novac, E. Rusu, G. Stăvărache, Dunărea de Jos

{"title":"BLACK SEA NAVAL ACCIDENTS – INTERVENTION MANAGEMENT","authors":"V. Novac, E. Rusu, G. Stăvărache, Dunărea de Jos","doi":"10.35219/mtd.2019.2.02","DOIUrl":"https://doi.org/10.35219/mtd.2019.2.02","url":null,"abstract":"Most of the global trade is carried by sea as the Earth surface is covered more than ¾ with water. For commercial purposes, the size of ships has continuously increased; thus, the space for cargo and passengers became more generous. Though, this leads to higher risks: reduced maneuverability, especially in narrow or confined waters, more costly intervention in case of an accident and consistent relief actions. When naval accidents affect the property, human life and environment are severely affected. To reduce the risk of accidents or curb their effects when produced, all stakeholders involved in shipping must obey the provisions of international regulations related to the safety of ships operations, collision avoidance, pollution prevention, and so on. Along with enforcing international regulations in the field, effective management of intervention in the case of an accident has to be adopted. This paper presents the influence of environmental factors in the western Black Sea basin on naval accidents, along with considerations related to the system of intervention in the case of distress situations or accident in the Romanian sector of the Black Sea.","PeriodicalId":125331,"journal":{"name":"Mechanical Testing and Diagnosis","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124306767","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: 7

PRELIMINARY ASSESSMENT OF WIND CONDITIONS IN CONSTANTA COUNTY BASED ON REANALYSIS SERIES 基于再分析序列的康斯坦察县风况初步评价

Mechanical Testing and Diagnosis Pub Date : 2019-07-15 DOI: 10.35219/mtd.2019.2.03

Emilian Boboc

引用次数: 0

RISK ANALYSIS ON THE HEAT PUMP SYSTEM TO USE FOR BUILDING HEATING, IN URBAN AREA 城市建筑供暖用热泵系统的风险分析

Mechanical Testing and Diagnosis Pub Date : 2019-07-15 DOI: 10.35219/mtd.2019.2.01

Cristina Călin, Calorgal S.A. Galati, E. Rusu, Ș. Dragomir

引用次数: 1