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Optimization design of bar-cage of twin-screw press based on BESO
  
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KeyWord:twin-screw press  bar-cage  topology optimization  bi-directional evolutionary structural optimization
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HUANG Shasha，XUE Qiang，HAO Xiaoqi  
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Abstract:
      Bar-cage of twin-screw press is the key component, which plays a key role in forming the pressure of squeezing oil and supporting the two screw shafts. According to present problems of the traditional experience design, the size and weight of bar-cage are too large, which causes material waste.The bi-directional evolutionary structural optimization method (BESO) was applied to the design of the bar-cage. The optimization objective of design was the maximum stiffness for the bar-cage subjected to a volume constraint. The BESO was implemented with Python program in the Abaqus. Finally, a new bar-cage structure was designed. The comparative analysis of the new structure and original structure showed that the weight of new structure reduced by 35.1%, and it could also meet strength requirement.And a new thinking of the design of bar-cage was offered by this optimization analysis method.
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