Vibration Problems During Construction

Sunday , 5, May 2019 Leave a comment

From sub-atomic particles entirely up to skyscrapers, internal movements and motions caused by the absorption of energy make all objects vibrate with a degree. This fact means that in a world filled with energy and movement, vibrations — or the oscillating responses of objects when moved from a posture of rest — would be the norm.

Some vibrations are expected and even needed for products to operate as expected. As a great example, consider traditional speakers that turn energy into vibration fixture resonance, which ultimately allows music lovers to listen to their favorite singers and musicians. Another example may be the tightly stretched diaphragm contained in the chest little bit of a stethoscope, which, when excited by sound waves, allows a physician to be controlled by a patient’s heartbeat and/or breathing.

Needless to say, not totally all objects vibrate in a way that’s helpful or even intended. For instance, there probably isn’t a civil engineer alive who doesn’t know the story of the Tacoma Narrows Bridge and how 40-mile-per-hour winds induced its collapse because of structural vibration. As for the rest of us, we all know of the bridge’s final, fateful moments on November 7, 1940 because of the frequently viewed footage captured by camera store owner Barney Elliott. The film shows the bridge going into violent wavelike motion before breaking up and falling into Washington State’s Puget Sound below.

An even more recent example of unintended vibration test fixture design may be the now famous June 10, 2000 opening day of London’s Millennium Footbridge. The combined synchronous movements of pedestrians caused what’s referred to as positive feedback — a swaying motion emanating from the natural human instinct to keep balanced while walking. The result triggered Londoners dubbing the structure the “Wobbly Bridge.”

Fortunately for manufacturers and consumers alike, the materials and products we count on today in from airplane wings to suspension bridges are made stronger and more reliable thanks in large part to vibration testing.

From sub-atomic particles entirely up to skyscrapers, internal movements and motions caused by the absorption of energy make all objects vibrate with a degree. This fact means that in a world filled with energy and movement, vibration shock test fixture design— or the oscillating responses of objects when moved from a posture of rest — would be the norm.

Some vibrations are expected and even needed for products to operate as expected. As a great example, consider traditional speakers that turn energy into vibrations, which ultimately allows music lovers to listen to their favorite singers and musicians. Another example may be the tightly stretched diaphragm contained in the chest little bit of a stethoscope, which, when excited by sound waves, allows a physician to be controlled by a patient’s heartbeat and/or breathing.

Needless to say, not totally all objects vibrate in a way that’s helpful or even intended. For instance, there probably isn’t a civil engineer alive who doesn’t know the story of the Tacoma Narrows Bridge and how 40-mile-per-hour winds induced its collapse because of structural vibration. As for the rest of us, we all know of the bridge’s final, fateful moments on November 7, 1940 because of the frequently viewed footage captured by camera store owner Barney Elliott. The film shows the bridge going into violent wavelike motion before breaking up and falling into Washington State’s Puget Sound below.

An even more recent example of unintended vibration may be the now famous June 10, 2000 opening day of London’s Millennium Footbridge. The combined synchronous movements of pedestrians caused what’s referred to as positive feedback — a swaying motion emanating from the natural human instinct to keep balanced while walking. The result triggered Londoners dubbing the structure the “Wobbly Bridge.”

Fortunately for manufacturers and consumers alike, the materials and products we count on today in from airplane wings to suspension bridges are made stronger and more reliable thanks in large part to vibration testing.

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