A note on non-linear phenomena in a non-ideal oscillator, with a snap-through truss absorber, including parameter uncertainties

作者：de Godoy Wiliam R A; Balthazar Jose M^*; Pontes Bento R Jr; Felix Jorge L P; Tusset Angelo M

来源：Proceedings of the Institution of Mechanical Engineers - Part K: Journal of Multi-body Dynamics , 2013, 227(K1): 76-86.

DOI：10.1177/1464419312462958

• Vibration absorber
• Sommerfeld effect
• non-ideal oscillator

This work considers the vibrating system that consists of a snap-through truss absorber coupled to an oscillator under excitation of an electric motor with an eccentricity and limited power, characterizing a non-ideal oscillator. It is aimed to use the non-linearity and quasi-zero stiffness of absorber (snap-through truss absorber) to obtain a significantly attenuation the jump phenomenon. There is also an interest to exhibit the reduction of Sommerfeld effect, to confirm the saturation phenomenon occurrence and show the power transfer in a non-linear structure, evidencing the pumping energy. As shown by simulations in this work, this absorber allows the energy pumping before and during the jump phenomenon, decreasing the higher amplitudes of considered system. Additionally, the occurrence of saturation phenomenon due use of snap-through truss absorber is verified. The analysis of parameter uncertainties was introduced. Sensitivity of system with parametric errors demonstrated a trustable system.

• 出版日期2013