Recently I am building equipment. It is as large as two refrigerators with aluminum extrusion frame. Unfortunately, it has visible resonance vibration. After measuring I find on the floor there is a 16.5 Hz vibration, probably from elevator motor above floor, or ventilation motors about 20 meters away.
So, I want to change my design, enhance rigidity to increase resonance frequency. Customers may install it near a normal vibration source. But, what are the low frequency of building vibration? I need to know it first to avoid it. Does anyone know the range of building low frequency? Usually from the elevator, transformer, ventilation motor, or water pump. Or is there any general frequency standard based on experience that a product resonance frequency should be higher than it to avoid resonance vibration?