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Study on Adaptive Shape Optimization

Journal of Beijing Institute of Technology 1998年第2期7卷 154-160页

作者：邹文胜左正兴范志刚张儒华北京理工大学车辆工程学院山西车用发动机研究所

Aim To introduce a new method of adaptive shape optimization (ASOP) based on three-dimensional structure boundary strength and optimize an engine bearing cap with the method. Methods Using the normal substance's property of thermal expansion and cooling shrinkage,the load which is proportional to the difference between the nodes' stress and their respective objective stress were applied to the corresponding variable nodes on the *** thermal load made the nodes whose stress is greater than their objective stress expand along the boundary's normal direction and the nodes whose stress is less than objec- tive stress shrink in the opposite direction , This process would repeat until the stress on the boundary nodes was converge to the objective stress. Results The satisfied results have been obtained when optimizing an engine bearing *** mass of the bearing cap is reduced to 55 percent of the total. Conclusion ASOP is an efficient,practical and reliable method which is suitable for optimizing the shape of the continuous structures.

关键词： adaptive shape optimization structure strength bearing cap

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Optimization and Application of Flexible Production Line Production Scheduling

Optimization and Application of Flexible Production Line Pro...

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第三十九届中国控制会议

作者： Yefeng Liu Yuan Zhao Kangju Li Shengping Yu Liaoning Key Laboratory of Information Physics Fusion and Intelligent Manufacturing for Grade CNC Machine Shenyang Institute of Technology School of mechanical engineering and automation Shenyang Institute of Technology State Key Laboratory of Synthetical Automation for Process Industries Northeastern University

The production planning of bearing cap directly affects whether the production rhythm of the process is coordinated or not. Based on the analysis of production scheduling objectives and constraints of flexible automatic production line for bearing cap, a mathematical model for production planning of bearing cap is established, and the mathematical model is solved. On the premise of defining the production date and corresponding production volume of production orders on each production line, the method of production planning for on-site day is improved based on heuristic method. The production planning optimization algorithm divides the production order and determines the order of the production order. According to the sorting result, the delivery time can be calculated to determine whether the work order is produced or not. The validity of the mathematical model and the optimization algorithm are proved by experiments.

关键词： bearing cap Heuristic algorithm Production planning Mathematical mode

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