流固耦合的搅拌器振动特性  

Study on Vibration Characteristics for Agitator With Fluid-Structure Coupling

作　　者：胡效东[1] 王海月[1] 刘馥瑜 梁之西 

机构地区：[1]山东科技大学机械电子工程学院,青岛266590

出　　处：《机械设计与研究》2017年第5期63-67,共5页Machine Design And Research

基　　金：山东省自然科学基金资助项目(ZR2014EEM018)

摘　　要：采用LMS Test.Lab振动测试系统,用敲击法测量了某搅拌器在自由状态和固定约束两种条件下的振动特性,并用有限元法数值模拟计算该搅拌器的振动模态,两者对比吻合较好,低阶固有频率相对误差均在10%之内,证明采用有限元法计算搅拌器模态特性是可行的。搅拌器通常在具有约束和液体(选择水介质)存在的条件下工作,基于流固耦合理论,采用有限元法计算在具有预应力和流体介质下的搅拌器振动特性,在液体的阻尼下,搅拌器低阶固有频率有所减小。在搅拌器设计时考虑液体环境内搅拌器的固有频率,有利于搅拌装备的稳定性,提高产品的使用寿命。The LMS Test. Lab has been used to measure the vibration characteristics of an agitator under free condition and fixed constraint with the percussion method, and the vibration mode of the agitator was numerically simulated by finite element method. The relative error of the low frequencies natural frequency is within 10%. It is proved that calculated the modal characteristics for the agitator by finite element method is feasible. The stirrer reactor has been usually operated in the presence of confinement and liquid （ selective water medium）. Based on the fluid- structure coupling theory, the finite element method was used to calculate the vibration characteristics for the agitator under the pre-stressed and fluid medium. Under the damping of the liquid, the low-order natural frequencies of the agitator were reduced. It is beneficial to the stability of mixing equipment and to improve the service life of the agitator when considering the natural frequencies of the agitator in the liquid environment.

关 键 词：搅拌器 振动测试 流固耦合 模态分析 

分 类 号：O329[理学—一般力学与力学基础]