What is a vibration damper in a diesel engine?

A vibration damper is a device in a diesel engine. that is used to suppress wind included vibrations on taut cables such as a power line. This dumbbell looking device consists of two masses at the ends of a short length cable or flexible rod which is clamped at its middle to the main cable. The damper device is designed to dissipate the energy of oscillations in the main cable to an acceptable level.