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Permanent URI for this collectionhttps://hdl.handle.net/20.500.14288/3

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Department: search.filters.department.Department of Mechanical EngineeringSubject: search.filters.subject.Management science

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    A novel approach to tube design via von Mises probability distribution
    (Taylor & Francis Ltd) Subay, Şehmuz Ali; N/A; N/A; N/A; Department of Mechanical Engineering; Oral, Atacan; Subaşı, Ömer; Öztürk, Çağlar; Lazoğlu, İsmail; PhD Student; Researcher; PhD student; Faculty Member; Department of Mechanical Engineering; Manufacturing and Automation Research Center (MARC); Graduate School of Sciences and Engineering; N/A; Graduate School of Sciences and Engineering; College of Engineering; N/A; N/A; N/A; 179391
    Discharge tube is a critical component in a reciprocating compressor that carries the refrigerant. It also transmits vibrations from compressor body to housing, making the design of tube a complex engineering problem combining static, modal and flow behaviour. This study proposes a novel design algorithm for discharge tube, to decrease the dependency on the trial-and-error approach commonly used by manufacturers. The computational approach creates a tube that connects the inlet and outlet using von Mises probability distribution. The created geometries are checked for static and dynamic properties using FEA. The algorithm continues until a candidate design passes the imposed thresholds. The candidate designs perform similarly to benchmark in evaluated aspects, demonstrating promising results. The presented algorithm is successful in generating alternative tube designs from scratch and can accommodate varying requirements. The main novelty of this study is the development of a comprehensive decision algorithm that considers multiple engineering parameters simultaneously.
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    Collaborative design and modeling of complex opto-mechanical systems
    (Sage Publications Ltd, 2009) Department of Mechanical Engineering; Başdoğan, İpek; Faculty Member; Department of Mechanical Engineering; College of Engineering; 179940
    In this article, we propose a concurrent design methodology that employs physics-based high fidelity computational models together with analysis methods to predict the performance of complex opto-mechanical systems. For this purpose, we developed a web-based collaborative design and modeling environment for the simulation of complex opto-mechanical systems (SIMCOMS). The analysis tools and the methodology presented in this article provide a systematic and quantitative way to investigate the end-to-end system performance of such systems, perform sensitivity analysis, and identify the critical components of the system that degrade the performance. The SIMCOMS integrates all the modeling and analysis tools in a common MATLAB computational environment and it can be accessed through standard web browsers. Through the use of structural, optical, and controls modules, SIMCOMS allows modeling and SIMCOMS. The analysis modules of SIMCOMS provide the means for predicting the performance of such systems and diagnosing the problematic components that degrade the performance. The web interface of SIMCOMS provides a flexible and robust environment for designing such complex opto-mechanical systems and keeps an archive of models to compare different design configurations. The design can be conducted concurrently by multidisciplinary teams located physically at different sites, which leads to savings in time and cost. We demonstrated the use of SIMCOMS through a case study which includes the redesign process of a siderostat mirror; one of the main optical components of the SIM PlanetQuest (formerly called Space Interferometry Mission). SIM will determine the positions and distances of stars several hundred times more accurately than any previous program. SIM provides a good example case for testing the functionality of SIMCOMS since the precise tolerance required by the SIM instrument facilitates the investigation of many design options, trades, and methods for minimizing interaction between the actively controlled optics and the structure.