期刊
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
卷 58, 期 2, 页码 687-700出版社
SPRINGER
DOI: 10.1007/s00158-018-1923-5
关键词
Pressure structures; Topology optimization; Identification of loading surface; Digital image processing; Regional contour tracking
资金
- 973 program [2014CB046803]
- National Natural Science Foundation of China [51609169, 51779173]
- State Key Laboratory Foundation of Shanghai JiaoTong University [1502]
This article presents a new computational approach to solve the design-dependent loading problem in topology optimization of pressure structures. A simple algorithm based on digital image processing and regional contour tracking technology is proposed that generates the appropriate loading surface during the topology evolution. First, the topological layout produced during the optimization process is transformed into a compact image. Then, the regional contour tracking technology is used to represent the boundary of objects and extract pressure loading elements. At last, the pressures are transferred directly to corresponding element nodes. Due to the semi-automatically determined endpoints of the loading boundaries, the current scheme can deal with structures loaded by pressure from outside the domain, as well as pressure completely contained within the domain. Also, the calculation of the load sensitivities can be avoided in the current scheme. As a simple alternative computational strategy for compliance topology optimization of pressure structures, the current scheme is stable, flexible and efficient. Representative numerical examples are presented to show the validity and advantages of the proposed scheme. Especially, the design of closed containers and storage tanks indicates that it works well for the topology optimization of pressure structures.
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