CAJ | 학술논문

利用涡轮带冠叶片干摩擦阻尼减振试验系统，分析了阻尼块与叶冠间正压力、阻尼块材料和接触面积及激振力对叶片共振频率的影响。试验结果显示，在特殊正压力加载时，叶片共振频率产生漂移现象，在其它正压力加载条件下，叶片共振频率随正压力增大基本不变；阻尼块面积和材料在不同激振力范围，对叶片共振频率产生不同影响。另外，通过试验还获取了叶片共振频率随外部参数的变化规律及叶片共振频率的大致漂移量，其结果对带冠阻尼减振系统的设计和工程应用都具有参考意义。
이용와륜대관협편간마찰조니감진시험계통，분석료조니괴여협관간정압력、조니괴재료화접촉면적급격진력대협편공진빈솔적영향。시험결과현시，재특수정압력가재시，협편공진빈솔산생표이현상，재기타정압력가재조건하，협편공진빈솔수정압력증대기본불변；조니괴면적화재료재불동격진력범위，대협편공진빈솔산생불동영향。령외，통과시험환획취료협편공진빈솔수외부삼수적변화규률급협편공진빈솔적대치표이량，기결과대대관조니감진계통적설계화공정응용도구유삼고의의。
With a dry friction damping test system of shrouded turbine blades, the effects of positive pres-sure between damping block and blade shroud, material and contact area of damping block and the excita-tion force on resonant frequency of the blade were analyzed. The results show that resonant frequency of the blade loaded special positive pressure has excursion phenomenon, while it will keep changeless when load-ed other increasing positive pressure. In addition, material and contact areas of damping block impose dif-ferent effects on the resonant frequency of the blade loaded different ranges of excitation force. Varying rules of blade resonant frequency by some parameters and approximate excursion value of resonant frequen-cy were obtained, and the results of experiment are referential for design and application of friction damping system of shrouded turbine blades.