improving modal testing measurements by identification of shaker/stinger /structure interactions

Publish Year: 1391
نوع سند: مقاله کنفرانسی
زبان: English
View: 1,400

This Paper With 8 Page And PDF Format Ready To Download

  • Certificate
  • من نویسنده این مقاله هستم

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این Paper:

شناسه ملی سند علمی:

ISAV02_049

تاریخ نمایه سازی: 26 اسفند 1391

Abstract:

When a shaker (or exciter) connects to a structure under test (SUT), the dynamic characteris-tics of the excitation system (shaker, stinger and transducers) becomes coupled with those of the SUT. These couplings contaminate recorded measurements, especially while exciting light/flexible SUTs. The aim of this work is to consider interactions between the excitation system and the SUT to introduce a new analytical model for prediction and reduction of this systematic error. With the aid of this model, changes in the dynamic stiffness of the SUT are estimated based on the stiffness of the excitation system. The effects of excitation system lo-cation and stiffness are shown in modal testing on a free-free beam. Furthermore, influence of force transducer location is studied in the excitation system setup. The proposed method is successfully used for identification and prediction of excitation system effects on dynamic characteristics of the beam.

Keywords:

Authors

m mohammadali

Centre of excellence in experimental solid mechanics and dynamics School of Mechanical Engineering, Iran University of Science and Technology