【摘要】 余热锅炉的构架护板结构是一个典型的复杂壳梁组合结构,在工程实际中对其进行力学分析主要使用有限元方法。讨论了其有限元建模过程中应注意的问题和处理方法、给出了一些很有实用价值的建模技巧,并对PG9171E型燃气轮机所配的余热锅炉的构架护板结构在设计阶段进行了有限元分析,根据其位移和应力分布状况对初始设计进行逐步调整,使该结构最终设计定型。文中方法对同类结构的有限元建模及力学分析有很好的参考价值。更多还原

【Abstract】 A rotor affected with bending is one of the major fault sources leading to an increase in vibration level of a rotor.The causes of the bending occurring on various kinds of rotor are first analyzed.Then,it is proposed to use single-plane active balancing techniques to eliminate the vibration fault of a bended rotor. Moreover,the feasibility of the proposed method is verified by tests.The results of the tests indicate that by using a single-plane active balancing device it is possible to reduce the vibration peak value of the bended rotor at a location of the first-order critical speed from 550 μm to below 100 μm,a reduction higher than 80%.From this example it can be seen that the technique under discussion can very effectively control the vibration caused by the bending of a rotor, demonstrating its high value in engineering practice.更多还原