The use of elastomeric mounts, pads, and damping elements between the cabin inner frame and the car sling structure to attenuate vibration and structure-borne noise from the drive train and guide rails before it enters the passenger compartment.
Full Definition
Cabin isolation systems decouple the cabin inner structure from the car frame, preventing high-frequency vibrations from the traction machine, guide rail surface irregularities, and rope excitation from reaching the cabin floor and walls. Isolation elements are typically rubber-metal anti-vibration mounts positioned at the four corners of the cabin platform (floor isolators) and at the cabin frame-to-sling connection points (wall isolators). Targeted natural frequency of the isolation system is 8–15 Hz (well below the dominant excitation at 20–50 Hz), providing ≥15 dB vibration attenuation. Selection of isolator stiffness must account for the total cabin mass (including passengers at rated load) to maintain natural frequency within the design range under all load conditions. Excessively soft isolators cause cabin sway (perceptible horizontal movement) at guide rail joints. Cabin isolation works in conjunction with rail-bracket anti-vibration pads and machine anti-vibration pads to achieve the overall acoustic comfort target.
