Eli5 Why do bus windows vibrate when you lean against them but car windows don’t?
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Car windows are much more better built for a variety of reasons, while bus windows aren’t.
Car windows are designed to resist being pulled around without power for security reasons, the window tracks and actuators are very tight. Bus windows don’t need that and are just tempered glass panes put on a sliding track or regular window frames.
Bus windows are also much bigger, their natural frequencies being lower and closer to the engine/road vibrations making them easier to go into harmonic oscillations when on the road. Perhaps the frequency didn’t match when driving, but it definitely did when you lean on it like pressing the string on a guitar, making it vibrate with the engines.
Car windows are much more better built for a variety of reasons, while bus windows aren’t.
Car windows are designed to resist being pulled around without power for security reasons, the window tracks and actuators are very tight. Bus windows don’t need that and are just tempered glass panes put on a sliding track or regular window frames.
Bus windows are also much bigger, their natural frequencies being lower and closer to the engine/road vibrations making them easier to go into harmonic oscillations when on the road. Perhaps the frequency didn’t match when driving, but it definitely did when you lean on it like pressing the string on a guitar, making it vibrate with the engines.
Car windows are much more better built for a variety of reasons, while bus windows aren’t.
Car windows are designed to resist being pulled around without power for security reasons, the window tracks and actuators are very tight. Bus windows don’t need that and are just tempered glass panes put on a sliding track or regular window frames.
Bus windows are also much bigger, their natural frequencies being lower and closer to the engine/road vibrations making them easier to go into harmonic oscillations when on the road. Perhaps the frequency didn’t match when driving, but it definitely did when you lean on it like pressing the string on a guitar, making it vibrate with the engines.
A car window is possible to open, which means that it “hangs” in a contraption in the door that disconnects it from the car a bit. And because the window would break eventually if it wasn’t “rubbered up” a bit, it’s also protected from vibrations.
A bus window, on the other hand, is an important part of the side of the bus in the regard that the bus needs at least a few windows to be intact, otherwise the roof will not be properly supported. In that kind of construction, you WILL feel the vibrations more, because you are literally leaning against the side of the bus when you lean against the window.
A car window is possible to open, which means that it “hangs” in a contraption in the door that disconnects it from the car a bit. And because the window would break eventually if it wasn’t “rubbered up” a bit, it’s also protected from vibrations.
A bus window, on the other hand, is an important part of the side of the bus in the regard that the bus needs at least a few windows to be intact, otherwise the roof will not be properly supported. In that kind of construction, you WILL feel the vibrations more, because you are literally leaning against the side of the bus when you lean against the window.
A car window is possible to open, which means that it “hangs” in a contraption in the door that disconnects it from the car a bit. And because the window would break eventually if it wasn’t “rubbered up” a bit, it’s also protected from vibrations.
A bus window, on the other hand, is an important part of the side of the bus in the regard that the bus needs at least a few windows to be intact, otherwise the roof will not be properly supported. In that kind of construction, you WILL feel the vibrations more, because you are literally leaning against the side of the bus when you lean against the window.
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