Modelling and vibration evaluations of rotational mistuning-connecting disk-drum coupling structures with partial hard-coating damping treatment

Numerical model and coupled vibration analysis of transmission shaft with spatial angle misalignment

“…6b. Taking shaft i and rotor i as an example, this paper introduces the method of creating bending and torsional coupled vibration model of shaft-rotor [40,41,42,43].…”

“…Under the combined action of shear, centrifugal force, bending moment and torque, the shaft occurs bending and torsional coupled vibration, as shown in Fig.6b. Taking shaft i and rotor i as an example, this paper introduces the method of creating bending and torsional coupled vibration model of shaft-rotor[40,41,42,43].It is assumed that the shaft-rotor moves in simple harmonic motion at angular velocity ωn, and the deflection, rotation angle, torsion angle, shear, bending moment and torque of each section are taken as state variables, and shaft i and rotor i are isolated from shafting for separate analysis.Fig. 6c shows the kinematic model of shaft i, 𝑂 𝑖−1 𝑅 and 𝐺 𝑖−1 𝑅 stand for the rotation center and mass center at the right section 𝑆 𝑖−1 𝑅 of the left end of shaft i in the coordinate system 𝑋𝑌𝑍, respectively; In the 𝑋𝑂𝑌 plane, the deflection of the section is 𝑦 𝑖−1 𝑅 and the rotation angle is 𝛽 𝑦 𝑖−1 𝑅 ; In the 𝑋𝑂𝑍 plane, the deflection is 𝑧 𝑖−1 𝑅 , the rotation angle is 𝛽 𝑧 𝑖−1…”

Vibration Analysis and Damping Effect of Blade-Hard Coating Composite Structure Based on Base Excitation

“…The application of hard coatings in the existing literature mostly focuses on simplifying coated discs [5][6][7][8][9][10][11][12][13][14][15], straight blades [16][17][18][19][20][21], plates [22][23][24][25][26], thin shells [27][28][29][30], and disk drums [31]. Yan et al [5] proposed using virtual layers to simulate changes in coating thickness and analyzed the impact of coating thickness on the natural frequency and forced response of actual disks.…”

“…Cui et al [30] applied hard coatings to aviation hydraulic pipelines to reduce damage caused by vibration. Du et al [31] applied hard coatings to disk drum coupling structures and found that some coating models had better vibration reduction effects than the entire layer model.…”