02-03-2017, 08:41 PM
While the cited paper undergoes peer review, it seems that the currently accepted explanation is the last alternate (5.4) the paper discussed, i.e. aeroelastic flutter:
https://en.wikipedia.org/wiki/Tacoma_Nar...)#Collapse
https://en.wikipedia.org/wiki/Aeroelasticity#Flutter
https://en.wikipedia.org/wiki/Tacoma_Nar...)#Collapse
https://en.wikipedia.org/wiki/Aeroelasticity#Flutter