実システムにおける油圧サイレンサの挿入損失特性

概要

論文の詳細を見る
The pulsation attenuation capabilities of hydraulic silencers in real systems are investigated theoretically and experimentally in terms of the insertion loss characteristics, taking the every important circuirt-design factors including the pump and the load into consideration, so as to develop an useful CAE design tool for reducing the system audible noise level through the use of a fluidborne vibration control technique. Particular attention has been paid to the theoretical determination of the optimum insertion location where the potential attenuation capability of silencer can be brought out maximally. Theoretical model of the insertion loss characteristics is improved and validated by comparison with many experimental results obtained over the wide test conditions changing the insertion location variously for the different two branch-connection types of silencers under the different two load conditions. Additiollally, a new expression for the insertion loss characteristics for the branch-connection type of silerlcer is proposed which makes the physical elucidation of its complex characteristics easy and help to search for the optimum insertion location efficiently. The simulated results of the insertion loss characteristics from the Present theoretical model agree with the experimental results with sufficient accuracy for practical use up to around 5th harmonic (up to around 1.5kHz) of the pump induced harmonic pressure pulsations.
1999-09-25