转子-风机-轴承系统振动特性仿真和测试-毕业设计.docxVIP

本科毕业论文 转子-风机-轴承系统振动特性仿真和测试 Simulation and Testing on Vibration Behavior of Rotor-Fan-Bearing System 注：此处是论文中英文题目，中文题目，不超过20个汉字，居中，字体：华文细黑，加黑，字号：二号，行距：多行距1.25，间距：段前、段后均为0行，取消网格对齐选项。英文题目，与中文题目对应，居中，字体：Times New Roman，字号：三号，加黑，行距：多倍行距1.25，间距：段前、段后均为0行，取消网格对齐选项。阅后删除此文本框。 阅后删除此文本框。 大连理工大学毕业设计（论文）格式规范 -  PAGE II - -  PAGE I - 摘 要 对大连理工大学涡轮机械及流体工程研究所设计的转子气动振动性能耦合实验台进行了的搭建、改进及问题分析，基本实现了实验台的设计功能。在此基础上分别开展了实验测试分析工作。对实验台的气动性能进行了测试，分析和计算，从出口流量来看，基本达到设计要求。转子结构改变时，轮盘的个数和位置对振动结果有较大的影响，轮盘个数越多、或者轮盘越靠近中心，在临界转速以前的测试的振动响应越大。通过改变不平衡量发生的相位，测试转子振动的响应可以找到了弯曲转子的“弓背”相位。弯曲转子对于不平衡质量大小较为敏感，在弯曲转子的凹面添加较小的不平衡质量时，振动反而增加，当不平衡质量进一步增大后，振动显著降低，因此弯曲转子比常规的转子振动要复杂得多。传统的影响系数法无法对弯曲转子实施动平衡，采取在弯曲转子的凹面添加不平衡量的方法，可以达到较好的动平衡效果。 关键词：风机；转子-轴承系统；不平衡响应；弯曲转子；动平衡 转子-风机-轴承系统振动特性仿真和测试 -  PAGE II - Simulation and Testing on Vibration Behavior of Rotor-Fan-Bearing System Abstract The installation, improvement and problem analysis was acted on the test rig of rotor aerodynamic and vibration behavior which was designed by Institute of turbomachinery and fluid engineering. The basic functions of this test rig were achieved. Testing and analysis work are proposed with this test rig. Aerodynamic performance was tested and analyzed, result shows the performance of the fan is not very good. When the rotor structure changes, the number and location of the disk have great impact on vibration situation of rotor system, unbalance responses of the tested vibration before critical speed were large when the number of disks was more or disks were closer to the rotor central. The convexity located phase of residual bending rotor can be found by vibration response testing with changing the unbalance of phase. The residual bending rotor was sensitive to balance, the vibration was get large when adding small unbalance mass located on concave of residual bending rotor, while the unbalance mass get larger, the vibration significantly reduced, therefore, the vibration of residual bending rotor is greater complex than the common