"Which cable suspension road bridge, known as ""Galloping Gertie"", was completely destroyed due to ""aeroelastic flutter"" on 7 November 1940?"
Tacoma Narrows Bridge Tacoma Narrows Bridge The Tacoma Narrows Bridge is a pair of twin suspension bridges that span the Tacoma Narrows strait of Puget Sound in Pierce County, Washington. The bridges connect the city of Tacoma with the Kitsap Peninsula and carry State Route 16 (known as Primary State Highway 14 until 1964) over the strait. Historically, the name "Tacoma Narrows Bridge" has applied to the original bridge nicknamed "Galloping Gertie", which opened in July 1940, but collapsed because of aeroelastic flutter four months later, as well as the replacement of the original bridge which opened in 1950 and still stands today
Flutter (electronics and communication) unforeseen vibrations. The most famous of these was the opening of the original Tacoma Narrows Suspension Bridge in mid 1940, which failed spectacularly 4 months later during a sustained 67 km/h crosswind and became known as Galloping Gertie for its flutter movement. During the 1950s over 100 incidents were recorded of military or civilian aircraft being lost or damaged due to unforeseen flutter events. While as recently as the 1990s jet engine flutter has grounded military aircraft. Techniques to avoid flutter include changes to the structure's aerodynamics, stiffening the structure to change the excitation frequency and increasing the damping within