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Chicago, IL, United States

Zhang H.,Shenyang Ligong University | Lin Z.,Assemble | Xu D.,Shenyang Ligong University
Journal of Theoretical and Applied Information Technology | Year: 2013

With the definite-element analysis software, a three-dimensional definite-element analysis has been carried out to the gasoline engine piston. Considering the thermal boundary condition, the stress and the deformation distribution conditions of the piston under the coupling effect of the thermal load and explosion pressure have been calculated, thus providing reference for design improvement. Results show that, the main cause of the piston safety, the piston deformation and the great stress is the temperature, so it is feasible to further decrease the piston temperature with structure optimization. © 2005 - 2013 JATIT & LLS. All rights reserved.

Zhang H.,Shenyang Ligong University | Lin Z.,Assemble | Xing J.,Shenyang Ligong University
Journal of Theoretical and Applied Information Technology | Year: 2013

This paper introduces the principle of thermal analysis for the combustion engine piston, gets the heat exchange coefficient of the piston top and the heat exchange coefficient distribution of the piston and the cooling water through calculation, calculates the temperature field of the piston with the finite element method and modifies the calculation model by repeatedly comparing the result with the measured temperature. It is found out that the temperatures of the piston top and the first circular groove are relatively high after calculating the temperature field and based on the results the optimization scheme of adding the cooling oil chamber is applied to the piston structure. Results show that, after optimization, the maximum temperature of the piston top is decreased to 264, and the temperature at the first ring is decreased to 204, thus improving the working condition of the piston ring. © 2005 - 2013 JATIT & LLS. All rights reserved.

Assemble | Date: 2013-12-13

Techniques (systems and methods and their embodiment in computer readable media) are disclosed for providing multiple parties a common view, and joint-control of that common view, into a high-fidelity model. Illustrative embodiments are described in the context of building information modeling systems, although the disclosed concepts are not so limited.

Assemble | Entity website

A method and apparatus for managing a building model inventory, including a database structured for storing element specification and instance data from both a previous version and a latter revision of building information modeling datasets, respectively. In addition to the building information modeling element data, the database associates completed assembly pass, unit cost, work breakdown structure, and other inventory management data with the element type definitions and element instance data. Application software compares the first and second inventory revisions to identify all changes, additions and/or deletions of building elements between the previous version and the latter revision of the building information modeling datasets. By tracking the elements that change, the changes that affect the construction schedule and quantity, configuration and specification of materials are identified. An engineering cost analysis based on the changed data provides a rapid understanding of the implications of any design change.

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