流固耦合的搅拌器振动特性

发布时间：2018-02-16 06:34

本文关键词： 搅拌器振动测试流固耦合模态分析　出处：《机械设计与研究》2017年05期 　论文类型：期刊论文

【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。
[Abstract]:The vibration characteristics of a stirrer under two conditions of free state and fixed constraint are measured by means of LMS Test.Lab vibration measurement system. The vibration modes of the agitator are numerically simulated and calculated by finite element method, and the results agree well with each other. The relative errors of low-order natural frequencies are all within 10%. It is proved that it is feasible to calculate the modal characteristics of stirrer by finite element method. The stirrer usually works under the condition of constraint and the existence of liquid (choosing water medium), based on the fluid-solid coupling theory. The vibration characteristics of agitator with prestress and fluid medium are calculated by finite element method. Under the damping of liquid, the low order natural frequency of agitator is reduced, and the natural frequency of agitator in liquid environment is considered in the design of agitator. It is beneficial to the stability of agitating equipment and the service life of products.
【作者单位】：山东科技大学机械电子工程学院;
【基金】：山东省自然科学基金资助项目(ZR2014EEM018)
【分类号】：O353.4;TH69

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