The Bridge That Danced Itself to Death: The Tragic Physics of Tacoma Narrows скачать в хорошем качестве

The Bridge That Danced Itself to Death: The Tragic Physics of Tacoma Narrows

Step onto the Tacoma Narrows Bridge, famously known as "Galloping Gertie," for a forensic, 45-minute deep dive into one of history's most spectacular engineering failures. This video moves past the simple narrative of "resonance" to conduct a detailed analysis of the true culprit: aeroelastic flutter-a destructive, self-excited aerodynamic oscillation. Opened in 1940, the bridge's revolutionary design, championed by engineer Leon Moisseiff, featured a dangerously slender profile and solid plate girders. This video meticulously breaks down how this flawed initial design calculus created an aerodynamically bluff cross-section. We explain the difference between the precursor Vortex-Induced Vibration (VIV) and the ultimate catastrophic force: torsional flutter. Learn how the bridge's own motion created a positive feedback loop that harvested the wind's energy, causing the deck to twist violently by 35 degrees until it tore itself apart on November 7, 1940. This is a must-watch for anyone interested in fluid dynamics, structural engineering, and the crucial lessons that ushered in the era of modern wind engineering. The collapse of the Tacoma Narrows Bridge is a timeless cautionary tale about the unforgiving laws of physics.