有關(guān)機(jī)械專業(yè)的英語(yǔ)自我介紹(編輯修改稿)
2024-10-26 03:03 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 structure of the rotor, the rotor solid finite element analysis model, Modal Analysis Support stiffness IMPACT natural frequencyof the rotor based on the finite element analysis model of the rotor, modal analysis using ANSYS its [ damping of the spring element is ignored, the the support stiffness 5X106 ~ lXI09N / m range order modal rotor is precession natural frequencies and negative precession natural frequency, further study of the critical speed, the first natural frequency [excluding the negative precession get the shaft first four natural frequency of the curve with the change in stiffness of the rotor is precession natural frequency with the support stiffness increases, and the rate of increase of the loworder natural frequency of the rotor with the bearing 24 order natural frequency of the rotor Found when the supporting stiffness increases to 8 N / m,Modal analysis after grinding exciting force is applied at the wheel at the harmonic response analysis, the Y direction of the force applied to the wheel outer node 7746(88 328N real part, imaginary part 1 9737N), and Z directions force(the real part of 9737N, the imaginary part of the 88 328N), so that the grinding force of a simple harmonic element stiffness take 7 N / m for the analysis of the response of the rotor at high frequencies, the frequency range of the excitationforce is expanded to 0 to 1600Hz, 20 load step harmonic response 30000r / min(corresponding to the nominal operating frequency ), of 48 OOOr / min(corresponding to the maximum operating frequency of 800 OHZ)that speed in the firstorder and secondorder critical speed, the second rotor vibration type(Figure 5)can be seen, the rotor wheel, the front protective bearings, the radial bearing and the rear radial bearing at the center of a sectional view of the dangerous 7 to 10 respectively for the wheel, the front protective bearings, the front radial bearing and a radial bearing at a frequency response of the vibration amplitude of the vibration amplitude of the radial bearing at the node 4484 frequency response curve shift increased amplitude in a The natural frequencies at the minimum, followed by the natural frequency of the secondorder, thirdorder natural Grinder Spindle structure parameters are as follows: rotor protection before and after bearing clearance the front and rear radial bearing clearance of from Table 3, when the frequency of the excitation force to the rotororder, thirdorder natural frequency, the resonance generated by the rotor displacement in the transf
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