Reducing distortion and internal forces in truss structures by member exchanges | Zendy

William H. Greene | Zendy; Raphael T. Haftka | Zendy

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Reducing distortion and internal forces in truss structures by member exchanges

Author(s) -

William H. Greene,

Raphael T. Haftka

Publication year - 1990

Publication title -

aiaa journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.828

H-Index - 158

eISSN - 1081-0102

pISSN - 0001-1452

DOI - 10.2514/3.25265

Subject(s) - truss , internal forces , distortion (music) , internal pressure , structural engineering , physics , mechanics , classical mechanics , aerospace engineering , engineering , telecommunications , amplifier , bandwidth (computing) , quantum mechanics

Manufacturing errors in the length of members or joint diameters of large truss reflector backup structures may result in unacceptable large distortion errors or member forces. However, it may be possible to accurately measure these length or diameter errors. The present work suggests that a member and joint placement strategy may be used to reduce distortion errors and internal member forces. A member and joint exchange algorithm is used to demonstrate the potential of this approach on several 102-member and 660-member truss reflector structures. It is shown that it is possible to simultaneously reduce the rms of the surface error and the rms of member forces by two orders of magnitude by member and joint exchanges.

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