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Abstract: For
providing reliable guides to optimize welding processing technology, it
is an effective way to utilize segmented moving heat source model and
similitude method based on elastic strain energy synthetically. A big
challenge, the accurate controlling of welding induced distortion in the
beam of the huge bridge crane for Sanxia project, is achieved
successfully with the proposed approaches. First, numerical simulation
and model experiments for some selected important factors are made at
the same time. If the results acquired through both ways are accordant,
then other factors can be analyzed reliably by the same numerical
method. Thus, a complete set of instructions can be received for the
real processing. The practical application proves that the numerical
method combined with physical experiments can enhance the manufacturing
level of welding structures evidently.
Key words: Numerical
analysis Model experiment Welding distortion Huge structure
CLC No: TG44
Received 20020109, received in
revised form 20020406 |