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Sustainable Design of Turbofan Engine： A Computer-Aided Design and Finite Element analysis

Journal of Mechanics Engineering and Automation 2018年第4期8卷 156-178页

作者： Nand K. Jha Mechanical Engineering Department Manhattan College Riverdale NY 10471 USA

A compressive design and analysis.of a turbofan engine is presented in this paper. The components of jet engine have been analyzed based on mechanical design concept. An attempt has been to select materials based on sustainability and green design considerations. The energy content （e） of the materials has been one of the parameters for material selection. The choice of material has a substantial impact on cost, manuthcturing process, and the life cycle efficiency. All components nose cone, fan blade, inlet shaft, including compressor has been solid modeled using Siemens NX 11.0 CAD software. The finite element analysis.of every component was performed and found safe. A tolerance analysis.was performed before assembly of the turbofan engine. A numerical analysis.was completed on blade and inlet geometries to determine a more efficient turbofan engine. Thermal analysis.was executed oi1 the cone and suitable corrections were made. Finally, the cost and the total energy were estimated to show how much energy is needed to manufacture a turbofan jet engine.

关键词： Sustainable design turbofan life cycle analysis.(LCA) Cost calculation energy calculation CAD fe analysis.

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Numerical Approach for the Live Load Distribution in Road Bridges

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Computer Technology and Application 2015年第2期6卷 101-106页

作者： Janusz Holowaty Faculty of Civil Engineering and Architecture West Pomeranian University of Technology Szczecin 70-311 Poland

The numerical method for computing the live load distribution coefficients in bridge decks is presented. The grillage analogy for representation of bridge decks is adopted in determining the general behavior under traffic loads. The principles of Maxwell＇s reciprocal theorem are developed in computing live load distribution coefficients and their influence lines. The presented method uses the approach developed in traditional methods of transversal live load distribution but bridge decks are modeled more realistic with the help of well-established grillage analogy. Simple numerical programs for grillage analysis.can be used and no special software is needed. While computing the distribution coefficients for a bridge deck the rest of the analysis.can be performed with habitual procedures of structural mechanics.

关键词： Numerical model bridge live load numerical modeling grillage method fe analysis.

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A STUDY ON POLYMER-MODIFIED MORTAR WITH HIGH FLEXURAL STRENGTH

A STUDY ON POLYMER-MODIFIED MORTAR WITH HIGH FLEXURAL STRENG...

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The International Symposium on Innovation & Sustainability of Structures in Civil Engineering

作者： K. FUKUZAWA Yashuaki FUKUDA Department of Urban ＆ Civil Engineering Ibaraki University Nakanarusawacho 4-12-1Hitachi316-8511 Japan Cement Buisiness Company Taiheiyo Cement Co. Akashi-cho 8-1Chuo-kuTokyo104-8518 Japan

＜正＞This paper deals with the development of polymer-modified mortar （PMM） with high flexural strength, which is expected to be used in place of ordinary cement concrete in the manufacture of concrete products. APMM, using a polyacrylic ester emulsion, and an ordinary cement con-crete are prepared. The results showed that the PMM has better mechanical properties and durability compared with ordinarycement concrete or mortar （OCC or OCM）. Structural test of a manhole made bybonding PMM units was done and it was confirmed that the performance of manhole is not sensitive to the moisture conditions of bonding surfaces, that a linear feM analysis.reproduces load-strain and load-deformation relation untill the load reached its initial crack load with acceptable accuracy.

关键词： Polymer-modified mortar steam curing high flexural strength concrete products durability bonding fe analysis.

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