Experiment Research On Damping Characteristic Of New Style Wire-rope Absorber

In order to effectively suppress harmful vibration and noise, various forms of absorberare widely used in vibration control technology. Wire-rope absorber researched in this paper,with lots of advantages such as strong adaptability, small size, simple structure, easyinstallation and reliability has been widely used in the vibration of onboard generator,passenger seat, powertrain mounting system, ambulance stretcher brackets and other precisioninstruments. Following the development of two structural forms of wire-rope absorber by thegroup, this paper carried out the experiment research of static stiffness in laboratory, andsimulated a real vehicle road experimental study of a certain type of suspension dampingsystem, which proved rubber composite wire-rope absorber has better damping performancein the experiment research. Through the introduction of the analysis and evaluation indicatorsof "jerk", this paper tries to carry out a more in-depth analysis and comparison on dampingcharacteristic of absorber. The concrete working contents of this paper are as follows:1. According to the nonlinear characteristics of the wire-rope absorber, by the use ofmechanical vibration theory, the paper carried out the Static Stiffness Characteristicsexperiment of wire-rope absorber with two structural forms and got the static stiffnesscharacteristic curve of the wire-rope absorber. The analysis of the experiment result showedthat the two kinds of wire-rope absorbers were both nonlinear damping elements with softstiffness characteristics. The stiffness of the shock absorber would change into more apparentsoftening properties which were accompanied by strong hysteresis characteristics with strandsand slip deformation between wire-ropes and the slip deformation. Among them, the rubber -composite wire-rope absorber had a larger hysteresis loop area of the envelope, so it could bebetter able to absorb impact energy, and it had showed good damping properties. On the basisof this pilot study, the paper established a differential equation model of the dynamic analysisof the wire-rope absorber.2. For the further study of the damping performance of two structural forms vibrationabsorber, the paper conducted a heavy damping performance comparison test of real vehicle by the use of pure wire-rope absorber and rubber composite wire-rope absorber. The paperdesigned test stand, developed a test program and carried out real vehicle tests under the tworoads surface excitation conditions. Through the study of the data and the time domain andfrequency domain analysis, the paper showed that in the low frequency range of 0 ~ 20Hz,two types of vibration absorbers both had vibration signal amplification phenomenon, but theamplification of the rubber composite wire-rope absorber was significantly less than that ofthe pure wire-rope absorber. In the frequency range above 20Hz, the vibration transmissionrate of the rubber composite wire-rope absorber was significantly lower than that of the purewire-rope absorber, which meant that the former has a better damping effect.3. The paper introduced the pass rate evaluation of "jerk" and carried out further analysisand comparison of the damping performances of the two kinds of vibration absorbers.Through the work of the above-mentioned experimental study, the paper obtained aseries of test data of the damping performance of the two kinds of wire-rope absorbersdeveloped by the group. The comparative analysis of the test results data showed that therubber composite wire-rope absorber has better damping effect than traditional wire-ropeabsorber.