metal corrugated pipe will occur 'resonance'? When we welded metal bellows seal, torsional vibration and axial vibration of two forms. Torsional vibration is usually produced by friction between the friction pair. Axial vibration is produced by shaft axial channeling move. Themselves into axial vibration torsional vibration. In many cases, when welding the metal bellows cycle slip frequency and inherent frequency of the sealing device is equal, the resonance may occur to produce larger stress lead to fracture. So, how to prevent to produce resonance? Can by changing the thickness, pills, material, installation length, spacing, makes the natural frequency of the seal should be designed to be larger than the main vibration frequency, or asymmetric waveform and fork is used to transfer torque. In addition, can also around the bellows with damping, slight elastic load, before they can weaken vibration amplitude to form, to ensure that contact with corrugated pipe, through the vibration of the bellows kinetic energy is derived, thus preventing resonance.