CAJ | 학술논문

为了控制液体静压转台系统的振动,将液体静压转台系统承载力进行了泰勒展开,从而将非线性油膜力等效简化为弹簧阻尼器系统,建立了液体静压转台系统的有限元模型,并对系统进行模态分析和谐响应分析,研究了油腔几何参数对系统动力学特性的影响,探讨了油腔数目、材料弹性模量、等效油膜刚度及等效油膜阻尼等参数对系统动位移的影响。结果表明：随着油腔外半径、初始油膜厚度和油腔深度的增大,系统的固有频率值将减小；封油边宽度增大,系统固有频率则增大。根据油腔布局的不同可以看到：4油腔系统的动位移最小,16油腔系统的动位移最大,系统在低频范围的动位移比高频范围大。材料弹性模量、等效油膜刚度和等效油膜阻尼对动位移有显著影响。该研究为液体静压转台系统的动态设计和提高转台的加工精度提供了参考依据。
위료공제액체정압전태계통적진동,장액체정압전태계통승재력진행료태륵전개,종이장비선성유막력등효간화위탄황조니기계통,건립료액체정압전태계통적유한원모형,병대계통진행모태분석화해향응분석,연구료유강궤하삼수대계통동역학특성적영향,탐토료유강수목、재료탄성모량、등효유막강도급등효유막조니등삼수대계통동위이적영향。결과표명：수착유강외반경、초시유막후도화유강심도적증대,계통적고유빈솔치장감소；봉유변관도증대,계통고유빈솔칙증대。근거유강포국적불동가이간도：4유강계통적동위이최소,16유강계통적동위이최대,계통재저빈범위적동위이비고빈범위대。재료탄성모량、등효유막강도화등효유막조니대동위이유현저영향。해연구위액체정압전태계통적동태설계화제고전태적가공정도제공료삼고의거。
In order to control the vibration of the hydrostatic turntable system, the bearing capacity of hydrostatic turntable system was expanded by the Taylor method, and the nonlinear oil film force was simplified equivalently as a spring-damper system. A finite element model was established for the hydrostatic turntable system. Based on this model, model analysis of the system was conducted to study the influence of the geometry parameters of oil chamber on the system dynamics. And harmonic response analysis was conducted to discuss the effect of the recess number, elastic modulus, equivalent oil film stiffness and damping coefficients on the system dynamic displacement. The results show that the natural frequency reduces with the increasing of recess outer radius, initial oil film thickness and recess depth. However, the natural frequency is increasing with the increase of oil seal width. It can be seen from the layout of the oil chamber, that the dynamic displacement of four recesses system is the least while the dynamic displacement of sixteen recesses system is the largest. Dynamic displacement in the low frequency range of the system is greater than that of the high-frequency range. This study provides reference for the dynamic design of the hydrostatic turntable system and for the improvement of machining precision of the turntable systems.