Design Solution
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2022 ◽  
Vol 12 (2) ◽  
pp. 566
Rihab Brahmi ◽  
Imen Belhadj ◽  
Moncef Hammadi ◽  
Nizar Aifaoui ◽  
Jean-Yves Choley

A mechanical product is the result of collaboration between different domains. In this paper we focus on the collaborative work that brings together the system engineer and the designer in the realization process of a mechanical system. A design solution, conceived in the CAD environment, is considered valid if all the specification requirements, defined in the MBSE (Model Based System Engineering) domain, are met. Thus, the preliminary study of these requirements has a major influence on the choice and validation of the design solution. In this paper a methodology for handling the requirements has been detailed. These requirements are classified into two main categories. The first one deals with the product performance and the second addresses the process performance in order to generate the best assembly sequence. Depending on the response of the designed solution to these requirements, it becomes easy to decide not only whether the design solution can be validated or not but also to choose the most optimal assembly sequence that ensures the best operation quality. A validation example of a speed reducer is used to demonstrate the added value of the proposed approach.

Paulo Augusto T. Arpini ◽  
Mayane C. Loureiro ◽  
Breno D. Breda ◽  
Adenílcia F. Calenzani ◽  
Élcio C. Alves

Abstract The composite floor system, composed of steel deck and concrete slab, generates more efficient and economical structures. On the other hand, the design of this type of structure has a high complexity level due to the consideration of several variables. In this respect, the objective of this paper is to present the formulation of the optimization problem for a composite floor system (steel and concrete) considering such environmental as economic impacts. To formulate the optimization problem, the reduction of environmental impact was adopted as an objective function - assuming the CO2 emission and the finance cost as parameters. The restrictions were taken by the limiting states imposed in standard NBR 8800:2008. The computer program was developed via Matlab R2016a and the optimization process was carried out using the Genetic Algorithm toolbox existing in this platform. Two application examples of the formulation at hand are presented: the first from the literature and the second from an existing building - in both situations the influences of different concrete compressive characteristic strengths were analyzed. The results of the optimization problem show a reduction in geometry and, consequently, in its weight. The solution found by the program reduces by up to 17.70% of CO2 emissions and 17.47% of the finance cost. When was applying different concrete compressive strengths, the optimal solution for environmental impact did not get the lowest cost. In general, the steel deck formwork obtained the highest percentage of environmental impact, while the beams and girders, with the same shape configuration, had the highest finance cost. Therefore, it is shown that the optimal design solution to CO2 emissions is not always the better solution for the finance cost.

2021 ◽  
pp. 1-21
Ramona Dogea ◽  
Xiu T Yan ◽  
Richard Millar ◽  

Additive manufacturing has been adopted widely across various industries for producing parts mainly due to their ability to create complex geometries, eliminate material wastage and enable faster production rate, among others. Additive manufacturing has also increased design solution space by enabling exploration of mechatronic solutions for mechanical structures. This includes the integration of smart devices into wing structures to achieve a datadriven predictive maintenance-based system. For this, there is still the need to continuously explore various ways of integrating sensory capability into a mechanical structure during the manufacturing processes to ensure improvement and reliability of aircraft components. The scope of this paper was to analyse different wing rib geometries and the influence of embedding sensory capability via design for additive manufacturing process. In this work, three wing rib geometries with cut-outs and for sensory placement were designed and analysed to estimate their equivalent stress and deformation when such sensory locations are introduced. The results confirm the idea that it is feasible to introduce holding cavities for structural performance monitoring sensors without compromising the structural design requirements. The results also show that deformation and stress are highly dependent on the rib thickness and the insertion of sensory locations

2021 ◽  
pp. bmjspcare-2021-003087
Kevin Wong ◽  
Rebecca McLaughlan ◽  
Anna Collins ◽  
Jennifer Philip

BackgroundIt is essential that the physical environments in which inpatient palliative care is provided support the needs of patients and the facilitate the multidimensional delivery of palliative care. This review aims to identify the features and characteristics of inpatient palliative care environments that enhance or detract from the patient experience; and identify opportunities for progress within this field.MethodThree databases were searched: MEDLINE (1946–2020), PsycINFO (1806–2020) and CINAHL (1937–2020). Articles were screened by title and abstract with included studies read in full for data extraction. Data synthesis involved thematic analysis informed by the findings of the included literature. Inclusion criteria were studies with empirical methodology examining adult palliative care in the hospital, hospice or nursing home environment. Studies that examined palliative care delivered within the emergency department, ICU or within the home were excluded, as were those related to paediatric palliative care.ResultsFour main themes were identified: the provision of privacy, facilitating interactions with family, facilitating comfort through homeliness and connections to nature.ConclusionsThe board acceptance of single rooms as the preeminent design solution for supporting privacy, dignity and family interaction, alongside current conceptions of homeliness that typically focus on matters of interior design, are limiting possibilities for further design innovation within palliative care settings. Research that investigates a broader set of design strategies through which the built environment can support care, alongside enhanced interdisciplinary collaboration, could positively contribute to patient and family experiences of inpatient palliative care.

Samer Mohamed Saleh Trissi, Mohamed Najib Kayali, Ahmed Haj Samer Mohamed Saleh Trissi, Mohamed Najib Kayali, Ahmed Haj

This research aims to find innovative design solution to create sustainable compound residential towers in Aleppo city, for the reconstruction phase, by using the concept of sustainability and benefiting from natural energy sources. International organizations and many countries are interested in applying sustainable architecture standards, reducing emissions, mitigating pollution, and reducing long- term operating costs for buildings by making the most of natural resources. Tower buildings are among the most important design models that have been subject to the concepts of sustainability and their applications, due to their consumption of large amounts of energy. This research presents a study of a sustainable design for a residential compound tower, for the reconstruction phase in Aleppo city, using the genetic algorithm within the Grasshopper program. The tower design Idea depends on developing and linking the basic design idea of ​​the project with main design determinants such as dimensions, heights and other variables, including location and climatic characteristics, and then creating a barometric chart for these connections within the Grasshopper program. This chart links to the Galapagos tool, which is responsible for running the genetic algorithm. The random structure is generated when the algorithm started, and as a result of the cross- breeding, more advanced generations are created. The process continues to reach the most appropriate environmentally sustainable form to reduce the heat load acquired in summer. The model is evaluated environmentally using Ladybug simulation software, to provide solutions for modular residential towers that fit the local environment of Aleppo city. The results of the research showed that the solar heat load was reduced by adopting the genetic algorithm to find the most suitable configuration for the tower. The amount of reduction is 35% between the initial solutions and the final approved solution. The research also revealed that the use of green roofs reduces the heat load by 20%. The research also showed the effect of using shading facades. On the southern, western and eastern directions, the heat gain was reduced by 5%.

L.V. Kachemtseva ◽  
D.D. Tymchenko ◽  

Abstract. Today, researchers' interest in the architecture of the USSR during the late 50s and early 70s of the 20th century is growing rapidly, since these years have left behind an outstanding architectural heritage. Many aspects of industrial architecture are being studied, one of which is the phenomenon of the emergence of atypical author's public buildings. The paper discusses the features of the creation and the current state of the Cinema and Concert Hall "Ukraine" – one of the unique objects of the early 1960s, built in Kharkiv. To achieve the goal, the authors formulated the following research objectives: to consider literary sources that provide general information about the CCH "Ukraine"; find and analyze authors' articles and publications written by a design team of architects, as well as experts in various fields; to classify and summarize the received material; analyze the current state of the structure. The article describes the design site in the city garden named after T. G. Shevchenko, on the site of which there was a summer open-air musical stage, in need of restoration due to the impossibility of its use. Presented is a group of architects who developed the project for the new building, and under whose leadership the construction was carried out. The author's concept of the design solution and the stages of its implementation are considered. The main purpose of the project was showing films, holding concerts of symphonic music, performing by pop groups and soloists, as well as organizing rallies and meetings. The features of space planning (composition, functional zoning) and architectural (interior, external design) solutions of the investigated object are revealed. An innovative, for that time, constructive solution of the structure was analyzed in detail and described – hanging cable-stayed structures of a saddle shape. A brief history of this constructive system is given. Particular attention is paid to the current state of the CCH "Ukraine", since on August 12, 2021, the facility was opened after a long reconstruction. Presented and described are the project proposals for reconstruction, made by the Ukrainian architectural bureau.

В. А. Ильичев ◽  
В. И. Колчунов ◽  
Н. В. Бакаева ◽  
А. А. Кормина

Постановка задачи. Новые вызовы современности существенным образом влияют на методологию градостроительства. Актуальной научной задачей, требующей выявления закономерностей функционирования городских элементов планировочных структур (жилых районов), следует считать разработку новых принципов жизнедеятельности города, регламентирующих биосферную совместимость городов и развитие человеческого капитала. Результаты. В работе получили развитие методологические основы градостроительного планирования, проектирования и оценки вариантов проектных решений жилых планировочных единиц города (квартала, микрорайона, жилого района) на принципах парадигмы биосферной совместимости городов и поселений, развивающих человека. Предложена концептуальная модель функционально-планировочной организации территории - иерархия функций города. Разработан алгоритм оценки вариантов проектов планировки жилых районов на основе индекса обеспеченности городскими функциями. Для каждой из функций города определен необходимый и достаточный состав индикаторов оценки проектных решений. Обсуждается перспектива количественной оценки социального благополучия населения жилых районов биосферосовместимого города как безальтернативного условия формирования комфортной городской среды. Вывод. Выполненная численная оценка проектного решения и сравнительный анализ уровня благоприятности жилого микрорайона с использованием принципов парадигмы биосферной совместимости показывают, какие изменения требуются в составе градостроительных решений не только для достижений качества материальной среды жизнедеятельности, но и для развития человека во всех отношениях. Statement of the problem. New challenges of our time significantly affect the methodology of urban planning. The development of new principles of city life, regulating the biosphere compatibility of cities and the development of human capital, should be considered an urgent scientific task that requires identifying the patterns of functioning of urban elements of planning structures (residential areas). Results. The paper develops the methodological foundations of urban planning, design and evaluation of design options for residential planning units of the city (quarter, neighborhood, residential area) on the principles of the paradigm of biosphere compatibility of cities and man-made settlements.. A conceptual model of the functional and planning organization of the territory-the hierarchy of city functions is set forth. An algorithm for evaluating variants of residential area planning projects based on the index of urban function provision has been developed. For each of the functions of the city, the necessary and sufficient composition of indicators for evaluating design decisions is identified. The article discusses the prospect of quantifying the social well-being of the population of residential areas of a biosphere-compatible city as an alternative condition for the formation of a comfortable urban environment. Conclusion. The numerical evaluation of the design solution and a comparative analysis of the level of favorability of a residential neighborhood using the principles of the biosphere compatibility paradigm show what changes are required in the composition of urban planning solutions not only to achieve the quality of the material environment of life, but also for human development in all respects.

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