Finite Element Analysis And Experimental Research Of A New Piezoelectric Friction Damper

In the field of civil engineering structure vibration control research has a longhistory, common friction damper is a common shock absorbing device, but theirapplication ranges are limited. In recent years as intelligent materials (magnetorheological, shape memory alloy, piezoelectric ceramics, etc.) are introduced into thevibration control, many scholars have proposed many effective intelligent suspensiondampers. Piezoelectric ceramics with positive and inverse piezoelectric effect, andstroke displacement is small, fast response, in its constraint condition to make a bigdriving force, often used in the intelligent shock absorbing device. In this paper,combined with the performance of the piezoelectric ceramic actuator and applicationcharacteristics of friction damper, this paper proposes a new piezoelectric frictiondamper, and the theoretical analysis and experimental research,(1) Studied the performance of piezoelectric materials, electrical materials,piezoelectric mechanism and constitutive relationships of piezoelectric materials, Thispaper theoretical analyze the linear relationship between output force, outputdisplacement of piezoelectric actuator and loading voltage. Based on the piezoelectricequation of piezoelectric ceramic actuator, this paper put forward a new type ofpiezoelectric friction damper and deduced the new type of piezoelectric frictiondamper damping force model.(2) ABAQUS was applied to analyze piezoelectric ceramic actuator and newtype of piezoelectric friction dampers in finite element modeling. Under the differentload voltage, stress value and displacement change values of shell and internalcomponents increases along with the load voltage in a new type of piezoelectric friction damper. Under the different displacement stroke, the maximum stress valueand maximum displacement changes of the shell and internals basic remainunchanged in the new piezoelectric friction damper. The damping force and frictionenergy of new piezoelectric friction damper was increased with the number ofpiezoelectric actuators increases.(3) This paper conducted a performance test of the new piezoelectric frictiondamper. The experimental results demonstrated that damper output positivelycorrelated with the loading voltage. At different pre-pressure effect on the newpiezoelectric friction dampers progressively load voltage, and then progressivelyunloaded voltage. Performance test results confirmed that the new piezoelectricfriction damper output and load voltage approximately linear related.(4) This paper conducted numerical analysis to the transmission tower modelstructure which contain new piezoelectric friction damper, verified the friction energydissipation effect of this new piezoelectric friction damper. Numerical analysis resultsshowed that the new piezoelectric friction damper has ideal damping effect to themodel structure as a whole. Carried on the shaking table test of new type piezoelectricfriction damper model structure which has different connect ways, the results showedthat the new piezoelectric friction damper has ideal damping effect and itseffectiveness when used in structure.The results showed that the new piezoelectric friction damping apparatus has agood output performance, and it will play a good control for the effect of frictionenergy dissipation when the new piezoelectric friction damper used in powertransmission tower.