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In this paper, coupled field analysis methods in finite element analysis software are investigated. 3D mechanical modeling software Solidworks 2011 and general finite element analysis software ANSYS Workbench 14.0 are used in combination, and two sets of sequential coupling simulation schemes containing thermal-vibration sequential coupling analysis and vibration-thermal sequential coupling analysis...
The near-field acoustic levitation (NFAL) relative to other suspension methods has some unique advantages, such as no special requirements on the electromagnetic properties of the object, with considerable levitation and driving force, and so on. A novel ultrasonic levitation of gyroscope has been developed based on the inverse piezoelectric effect. The ultrasonic vibration is induced by two B04 flexural...
Based on the understanding of operation principle of traveling wave rotary ultrasonic motor, the physical condition is investigated for the disk stator with orthogonal vibration modes of the same frequency. It is pointed that the stator teeth have effect on geometry axial symmetry of the disk stator in addition to the increased driving for the rotor. Through qualitative analysis of dynamic equation...
This paper investigates the vibration control for strap down inertial navigation system (SINS) based on the theoretical analysis and the simulation confirmation. Firstly, the disadvantage of passive vibration control technique commonly used for SINS at present is pointed out that it is only effective at high frequency. Then active and passive compound vibration control is put forward, and it is shown...
This study presents a novel method based on the empirical mode decomposition (EMD) and the envelope analysis for the fault detection of rolling bearings. The main purpose is to overcome the traditional envelope method in the choosing of the resonant frequency band. First, the EMD method is adaptively to decompose the vibration signals into a series of the intrinsic mode function (IMF). Then, the decision...
In this paper, ANSYS finite element analysis software is used to simulate the twisted state of turbine integral rotor's discs. For various stepped shaft structure, the formula of ??-stiffness influence coefficient is fit by changing the geometric parameters of the equal-thickness disc, then equivalent diameter of stiffness is obtained. For the cone-shaped disc, the equivalent diameter of stiffness...
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