Measurement method for equivalent damping force of tuned mass damper(TMD)

A mechanical simplified model for structure attached by tuned mass damper (TMD) was established. Based on empirical formula given by Den Hartog,for the purpose of determining the force (called equivalent damping force) generated between TMD and structure,a new testing system,which is the combination of half-simulation with half-experiment,is designed and carried out. This system can test the characteristics of TMD and reproduce the response of platform under the real environmental excitations. The principle of the system and the testing method of equivalent damping force are introduced. Under the sine excitation,by collecting the data of load cell,and comparing with the calculated values,it is found that the two results are almost the same. Through the experiments,the feasibility of TMD testing system is confirmed.