Im Maschinen- und Fahrzeugbau wird die erfolgreiche Auslegung komplexer Antriebssysteme zunehmend durch leistungsfähige Simulationstechniken unterstützt. Das dynamische Zusammenspiel von verschiedenartig aufgebauten und miteinander vernetzten Teilsystemen aus unterschiedlichen physikalischen Domänen kann ausschließlich durch eine ganzheitliche Systembetrachtung untersucht und optimiert werden. Hierbei stehen besonders die Funktion, Effizienz und Prozesssicherheit in der Produktherstellung im Vordergrund. Dieser Beitrag beinhaltet die Entwicklung von Bibliothekselementen zur effektiven Simulation von Band- und Koppelgetrieben innerhalb einer Simulationsumgebung. Mit einem speziell für ebene Mechanismen erarbeiteten seriellen Schnittstellenkonzept lassen sich innerhalb kurzer Zeit beliebige Getriebestrukturen frei zu einem vollständigen Antriebssystem aufbauen. Mit den neu geschaffenen Elementen können neben den allgemein bekannten Getriebeaufbauten auch Bandgetriebe modelliert werden, bei denen ein Zugmittel über Unrundscheiben, lose und feste Rollen, durch eine Abzugsdüse oder sogar über Glieder von Koppelgetrieben geführt wird. Zudem wird ein praktikables Verfahren zur Maßsynthese von Ausgleichsmechanismen mit Feder-Bandgetrieben vorgestellt sowie ein vollständiges Bewertungskriterium, das eine sichere Aussage über die physikalische Existenz einer berechneten Bandkurvenscheibenkontur hinsichtlich Stetigkeit und Konvexität zulässt. Abschließend wird anhand von Beispielen die Leistungsfähigkeit der neuen Elemente im Kontext der Gesamtsimulation demonstriert. / This paper shows the development of library elements for effective simulation of planar band mechanism and linkage gears. A specially design concept for planar mechanisms interface is able to save modelling time to build up multiple transmission structures for a complete drive system. Only by a few steps band transmissions can be modeled in which a band winded on cam discs as well as loose and fixed pulleys, eyelets of textile machines or even guided by a couple point of a linkage gear.

O tabuleiro laminado protendido é uma composição de peças interligadas por uma tensão de compressão aplicada perpendicularmente às lâminas de madeira. Para aplicar tal tensão, são usados elementos de aço tensionados e a cordoalha engraxada aparece no cenário atual como um material econômico para tabuleiros laminados protendidos, em substituição às barras dywidag, que são comumente utilizadas neste tipo de estrutura em outros países. O funcionamento mecânico do tabuleiro é caracterizado como uma placa ortotrópica, e este trabalho visou determinar as relações entre as constantes elásticas do tabuleiro com a utilização da cordoalha engraxada. Foram analisadas também as perdas de protensão ocorridas ao longo do tempo, causadas pela fluência e relaxação dos materiais e, a partir dos resultados, foi proposta uma equação para determinação teórica da perda de protensão nos tabuleiros. O estudo experimental foi realizado em um modelo em escala reduzida construído no LaMEM (Laboratório de Madeiras e Estruturas de Madeira) para determinar as constantes elásticas e as perdas de protensão. Ao fim do trabalho são apresentados os resultados e comparações com estudos anteriores; também foi confeccionado um Manual de Boa Execução para Tabuleiros Laminados Protendidos de Madeira com Cordoalha engraxada. / The stress-laminated bridge deck is a composition of parts, interconnected by compression stress, perpendicularly applied to the wood laminate. In order to apply such stress, stressed steel elements are used, as well as the greased wire rope, which comes along in the current scenario as an economic material for stress-laminated bridge decks, replacing the dywidag bars, commonly used in this sort of structure in other countries. This bridge deck mechanic function is characterized as an orthotropic plate, and this paper aimed at determining the relation among the decks elastic constants with the greased wire rope. Another analyzed point is the stress loss occurred through time, caused by material creep and relaxation, and, through the results, an equation for the decks stress loss theoretical determination was proposed. The experimental study was developed in a reduced scale built in LaMEM (Laboratório de Madeiras e Estruturas de Madeira) to determine the elastic constants and the stress loss. The results and comparisons with previous studies are presented by the end of this paper; In addition, a handbook of Proper Execution for Stress-laminated Wood Bridge Decks with Greased Wire Rope was developed.

Submitted by admin tede (tede@pucgoias.edu.br) on 2016-12-09T12:16:23Z No. of bitstreams: 1 GARIBALDI TEIXEIRA NETO.pdf: 1516545 bytes, checksum: 23fcb900cca46f3b3b38e4e063d2454e (MD5) / Made available in DSpace on 2016-12-09T12:16:23Z (GMT). No. of bitstreams: 1 GARIBALDI TEIXEIRA NETO.pdf: 1516545 bytes, checksum: 23fcb900cca46f3b3b38e4e063d2454e (MD5) Previous issue date: 2015-09-23 / This study presents a computer simulation model based on the theory of constraints, the simplified drum-lung-string method and system production to availability. The goal is to use these concepts to build a model of the production system of the searched company, replicate it on a simulation software, and perform interventions in resources with restraint in order to increase its capacity if the system does not meet the demand. The object of this study was a plant in the food industry, data collection related to the production system, was carried out from June 2012 to December 2013, and the simulation process was generated by the end of 2015. The results were reproduction of each of the production areas as well as the RRC and bottlenecks encountered in the production system. Still, interventions applied in the simulated model, were subsequently applied by the company. / Este trabalho apresenta um modelo de simulação computacional baseado na teoria das restrições, no método tambor-pulmão-corda simplificado e no sistema produção para disponibilidade. O objetivo é utilizar estes conceitos para construir um modelo do sistema produtivo da empresa pesquisada, replicá-lo em um software de simulação, e, realizar intervenções nos recursos com restrição afim de aumentar suas capacidades, caso o sistema não atenda à demanda. O objeto deste estudo foi uma fábrica do ramo alimentício, a coleta dos dados relacionadas ao sistema produtivo, foi realizada no período de junho de 2012 a dezembro de 2013, e o processo de simulação foi gerado até o final de 2015. Os resultados obtidos foram a reprodução de cada uma das áreas produtivas, bem como dos gargalos e RRC encontrados no sistema produtivo. Ainda, as intervenções aplicadas no modelo simulado, foram posteriormente aplicadas pela empresa.

The thesis deals with the current state of how air services are used within the Integrated Rescue System (IRS); it analyzes the level of equipment, possibilities of use and deployment of such technologies in emergency situations; and evaluates technical, qualitative and quantitative levels of all means that air services use in emergency situations. The thesis also puts emphasis on the analysis of dislocation of these means, its advantages and suitability when scrutinized in terms of quality, speed and efficiency of their deployment in emergency security situations, rescue operations, or their deployment during natural disasters. The outcome of the thesis comprises of proposals how to comprehensively amend applicable laws; and of conclusions that may help instigate discussion on the observed shortfalls, and how to increase efficiency, economy, and logical scheme leading to a timely response in emergency situations. The empirical part of thesis includes quantitative and qualitative researches which scrutinized two research corpuses. Tackling the first research corpus, the author used questionnaires to collect data technically. The questionnaires were aimed at members of the basic units of the IRS components. The outcomes of the questionnaires are shown in graphs. Tackling the second research corpus, the author held semi-structured interviews with expert representatives of subjects that provide air services within the IRS. Assessment of the outcomes was based on the transcriptions of the interviews which involved inserting the data into tables summarizing the most important outcomes of the research. Subsequently, these outcomes were used to identify the most important theses which were based on the answers provided by the respondents to research questions. The research also included an analysis of the available legal standards and documents related to the use of air services to provide efficient intervention, their assessment and identification of some criteria for de lege ferenda proposals to comprehensively amend selected laws. In conclusion, it was found out that there is poor awareness of possibilities how to use air services among the members of the basic units in individual IRS components, which results in insufficient deployment of Air Services while carrying out interventions.

Submitted by Lucas Martins Ikeziri (lucas.ikeziri@unesp.br) on 2018-08-13T13:57:43Z No. of bitstreams: 1 Dissertação - Lucas Martins Ikeziri.pdf: 3834872 bytes, checksum: dcbff094cc5b0ef08e5910d9efbb4364 (MD5) / Approved for entry into archive by Minervina Teixeira Lopes null (vina_lopes@bauru.unesp.br) on 2018-08-13T18:33:33Z (GMT) No. of bitstreams: 1 ikeziri_lm_me_bauru.pdf: 3267956 bytes, checksum: 0073dc72ff68b084049d7c710e797002 (MD5) / Made available in DSpace on 2018-08-13T18:33:33Z (GMT). No. of bitstreams: 1 ikeziri_lm_me_bauru.pdf: 3267956 bytes, checksum: 0073dc72ff68b084049d7c710e797002 (MD5) Previous issue date: 2018-06-28 / O gerenciamento de estoques em cadeias de suprimentos vem enfrentando diversos problemas, como baixa rotatividade, altos investimentos em estoque, vendas perdidas por rupturas e alto índice de obsolescência dos produtos estocados. Assim, esta pesquisa tem o objetivo de avaliar a efetividade da técnica Gerenciamento Dinâmico do Pulmão (Dynamic Buffer Management - DBM) como forma de preservar a disponibilidade de produtos destinados à entrega imediata em ambientes que adotem a solução de distribuição e reposição puxada da Teoria das Restrições. Para tanto, foram realizadas simulações no software ProModel utilizando dados estocásticos para o tempo de reposição e cenários com diferentes combinações de demanda. Esta, por sua vez, pode se comportar de duas formas: i) média sem tendência com dois níveis de coeficiente de variação e ii) média com tendência sazonal com dois níveis de intensidade. Dois algoritmos do DBM foram modelados segundo seus princípios constatados na literatura e combinados com parâmetros para ajuste dinâmico do estoque alvo. Os modelos foram avaliados por meio dos seguintes indicadores: fill rate, estoque médio no sistema e rotatividade por atendimento imediato da demanda. Os resultados indicam que para a demanda média sem tendência, desativar o DBM e manter um nível sensato de estoque alvo no sistema inibe ajustes indevidos e garante um bom desempenho do modelo. Contudo, para a demanda média com tendência sazonal, o DBM é altamente recomendado para assegurar a performance do sistema e ajustar os níveis de estoque conforme o padrão da demanda se altera. / Inventory management in supply chains has faced several problems, such as low turnover, high inventory investments, lost sales due to disruptions, and high obsolescence of stored products. Thus, this research aims to evaluate the effectiveness of the Dynamic Buffer Management (DBM) technique as a way of preserving the availability of products destined for immediate delivery in environments that adopt the distribution solution and pull replenishment of the Theory of Constraints (TOC). For that, simulations were performed in the ProModel software using stochastic data for the replenishment time and scenarios with different combinations of demand. This, in turn, can behave in two ways: i) average without trend with two levels of coefficient of variation and ii) average with seasonal trend with two levels of intensity. Two DBM algorithms were modeled according to their principles found in the literature and combined with parameters for dynamic adjustment of the target level. The models were evaluated through the following indicators: fill rate, average inventory in the system and turnover for immediate demand response. The results indicate that for the average demand without trend, disabling DBM and maintaining a sensible level of target level in the system inhibits undue adjustments and ensures good model performance. However, for average demand with seasonal trend, DBM is highly recommended to ensure system performance and adjust inventory levels as the demand pattern changes.

O tabuleiro laminado protendido é uma composição de peças interligadas por uma tensão de compressão aplicada perpendicularmente às lâminas de madeira. Para aplicar tal tensão, são usados elementos de aço tensionados e a cordoalha engraxada aparece no cenário atual como um material econômico para tabuleiros laminados protendidos, em substituição às barras dywidag, que são comumente utilizadas neste tipo de estrutura em outros países. O funcionamento mecânico do tabuleiro é caracterizado como uma placa ortotrópica, e este trabalho visou determinar as relações entre as constantes elásticas do tabuleiro com a utilização da cordoalha engraxada. Foram analisadas também as perdas de protensão ocorridas ao longo do tempo, causadas pela fluência e relaxação dos materiais e, a partir dos resultados, foi proposta uma equação para determinação teórica da perda de protensão nos tabuleiros. O estudo experimental foi realizado em um modelo em escala reduzida construído no LaMEM (Laboratório de Madeiras e Estruturas de Madeira) para determinar as constantes elásticas e as perdas de protensão. Ao fim do trabalho são apresentados os resultados e comparações com estudos anteriores; também foi confeccionado um Manual de Boa Execução para Tabuleiros Laminados Protendidos de Madeira com Cordoalha engraxada. / The stress-laminated bridge deck is a composition of parts, interconnected by compression stress, perpendicularly applied to the wood laminate. In order to apply such stress, stressed steel elements are used, as well as the greased wire rope, which comes along in the current scenario as an economic material for stress-laminated bridge decks, replacing the dywidag bars, commonly used in this sort of structure in other countries. This bridge deck mechanic function is characterized as an orthotropic plate, and this paper aimed at determining the relation among the decks elastic constants with the greased wire rope. Another analyzed point is the stress loss occurred through time, caused by material creep and relaxation, and, through the results, an equation for the decks stress loss theoretical determination was proposed. The experimental study was developed in a reduced scale built in LaMEM (Laboratório de Madeiras e Estruturas de Madeira) to determine the elastic constants and the stress loss. The results and comparisons with previous studies are presented by the end of this paper; In addition, a handbook of Proper Execution for Stress-laminated Wood Bridge Decks with Greased Wire Rope was developed.

In 1984, Eli Goldratt published his novel “The Goal – a process of ongoing improvement”. Constraints Management has since evolved into a field of study, still widely debated and written about today. Most companies soon realized that the principles of Constraints Management could no longer be ignored to stay competitive. The South African Breweries (now SABMiller plc) is the world's leading brewer in developing markets. The company has dominated the South African liquor market for years and is currently the second largest brewing company in the world, operating in Africa, China, Europe and the USA, yet even a company with this reputation can still be ignoring the basic principles of Constraints Management. This dissertation concentrates on the application of Constraints Management in a selected brewery in South Africa. The measures used in one of SAB’s most successful breweries will be tested against Constraints Management principles, illustrating how the practice of driving performance measures without focusing on the constraint can lead one away from the goal of the company. Rosslyn Brewery is a brewery driven by traditional brewing industry performance measures. The key drivers of the brewery have always been to increase factory efficiency and reduce costs. Rosslyn set the benchmark for packaging efficiency within SAB. The problem is that the packaging operation is not the constraint in the brewery. The throughput of the brewery is determined by the operation feeding into packaging, i.e. filtration. The end result is that even though the packaging lines have the best efficiency, they still have to stop and wait for beer to become available from filtration, resulting in downtime, frustration and eventually costly overtime and weekend work. The core conflict of the brewery is the trade-off between running all the resources as efficiently as possible, and thereby decreasing product cost, and running only the constraint as efficiently as possible, resulting in an increase in throughput. The Thinking Process was used to evaluate the conflict and a solution developed. The solution consists of the following: 1. The brewery has to adopt Constraints Management using the 5 step process of ongoing improvement. The capacity constraint has to be exploited and all other operations subordinated, to ensure that products are not produced for the sake of improving efficiency. 2. The operational measures of the brewery have to be changed from increasing factory efficiency and reducing R/hl to increasing throughput, decreasing inventory and decreasing operating expense. 3. The production schedule and raw material release for the whole plant need to be determined by filtration. This requires a change in the current advanced planning solution to incorporate the principles of Drum-Buffer-Rope. If the decision is made and actions taken, the brewery will be able to survive the next decade, even if there is a further decline in the market. If not, the focus will still be on reducing product cost, whilst improving the efficiency of all operations. This will lead to further line closures and retrenchments, doing nothing more but reducing SABMiller’s potential future capacity and flexibility. / Dissertation (MEng (Management of Technology))--University of Pretoria, 2005. / Graduate School of Technology Management (GSTM) / unrestricted

Target of the submitted work was a proposal of a new type of shelf stackers in the range from 8 to 36 m that are working in fully automated warehouses. By using a fully automated storage system all human supervision in ordering pallets in a warehouse are canceled and everything is taken over by the control system. These stores are very efficient and save both time and money. With regard to safety requirements, regular inspections should be provided to the system. At the beginning of this work, there was done a short introduction to the particular study including the description of basic parts of the shelf stackers. Consequently, there were done relevant computations for the drag device and its drive, drives for the travel and the finite method was used to the stress analysis of the mast shelf stacker. In the last part of this thesis is done a safety concept.

This thesis deals with design four-wheel crab of crane for overhead crane with capacity of 32,000 kg. Contains the functional calculations of steel rope , pulleys, cable drum. The integral part of the thesis constitutes the calculation and choice of driving mechanism for lifting, travel drive and motor drive pulley block hook rotation.

This diploma thesis describes the business plan to build a rope park in the Pardubice region, specifically in Litomyšl. The content of the work is at the beginning the theoretical background. Further analysis section analyzes the company environment. The final section then describes the proposals of project of the rope park and its anticipated future prospects.