【摘要】：本文主要對用于磁懸浮轉(zhuǎn)子系統(tǒng)減振的鼠籠彈支—金屬橡膠阻尼器進行了設(shè)計研究。磁懸浮轉(zhuǎn)子系統(tǒng)因自身剛度阻尼相對較小，存在振動抑制能力差的問題，將系統(tǒng)支承在能夠提供附加剛度和阻尼的鼠籠彈支—金屬橡膠阻尼器上，則可有效改善系統(tǒng)的振動抑制能力。主要內(nèi)容如下： 首先，分析了金屬橡膠的阻尼減振機理，并結(jié)合原有磁懸浮轉(zhuǎn)子系統(tǒng)試驗臺結(jié)構(gòu)尺寸以及系統(tǒng)動態(tài)性能的需要，，完成了阻尼器各組件的結(jié)構(gòu)設(shè)計及加工。 其次，研究了磁懸浮軸承轉(zhuǎn)子系統(tǒng)在不同阻尼下的不平衡響應(yīng)，并初步探究了阻尼器不同阻尼對轉(zhuǎn)子減振效果的影響�；贏NSYS Workbench的Exploration優(yōu)化模塊，以支承在阻尼器上轉(zhuǎn)子系統(tǒng)的不平衡響應(yīng)作為目標(biāo)函數(shù)，完成了阻尼器的剛度和阻尼參數(shù)優(yōu)化。另外，利用傳遞矩陣法分析了引入阻尼器前后轉(zhuǎn)子的不平衡響應(yīng)，并與有限元法所得結(jié)果進行了對比。 然后，根據(jù)優(yōu)化得出的阻尼器最佳剛度值，對鼠籠彈支和金屬橡膠的剛度進行分配，并基于ANSYS Workbench的靜力學(xué)分析模塊完成鼠籠彈支的結(jié)構(gòu)設(shè)計。 最后，對引入阻尼器前后的轉(zhuǎn)子系統(tǒng)分別進行試驗?zāi)B(tài)分析以及穩(wěn)態(tài)和瞬態(tài)不平衡響應(yīng)試驗。由于磁懸浮軸承剛度、阻尼難以準(zhǔn)確測量，在仿真時取其各路剛度相同，而實際各路剛度值偏差較大，使最終試驗結(jié)果與仿真結(jié)果未能保持一致性。但對比試驗結(jié)果仍可發(fā)現(xiàn)，鼠籠彈支—金屬橡膠阻尼器的引入增大了轉(zhuǎn)子系統(tǒng)的模態(tài)阻尼比，有效降低了轉(zhuǎn)子通過一彎臨界轉(zhuǎn)速時的振動位移，使轉(zhuǎn)子振動特性得到有效改善。
[Abstract]:In this paper, the design and research of the metal rubber damper for the magnetic suspension rotor system are presented. Because the stiffness damping of magnetic suspension rotor system is relatively small, there is the problem of poor vibration suppression ability. The system is supported on the cage projectile support metal rubber damper which can provide additional stiffness and damping. It can effectively improve the vibration suppression ability of the system. The main contents are as follows: firstly, the damping mechanism of metal rubber is analyzed, and the structural design and processing of the damper components are completed according to the structural size of the original maglev rotor system test rig and the need of the dynamic performance of the system. Secondly, the unbalanced response of magnetic bearing rotor system under different damping conditions is studied, and the effect of different damping of damper on rotor vibration damping is discussed. Based on the ANSYS Workbench Exploration optimization module, the stiffness and damping parameters of the damper are optimized by taking the unbalanced response of the rotor system supported on the damper as the objective function. In addition, the unbalance response of rotor before and after introducing damper is analyzed by transfer matrix method, and the results are compared with those obtained by finite element method. Then, according to the optimum stiffness of the damper, the stiffness of the cage bomb and metal rubber is allocated, and the structure design of the cage support is completed based on the statics analysis module of ANSYS Workbench. Finally, the experimental modal analysis and transient unbalance response tests of the rotor system before and after the dampers are carried out. Because the stiffness of the magnetic bearing is difficult to be measured accurately, the stiffness of the bearing is the same in the simulation, but the deviation of the actual stiffness is large, which makes the final test result and the simulation result not consistent. However, the experimental results show that the introduction of the squirrel-cage project-metal rubber damper increases the modal damping ratio of the rotor system, effectively reduces the vibration displacement of the rotor when it passes through the first bending critical speed, and effectively improves the rotor vibration characteristics.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB535.1

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