Fault Diagnosis of Bearings with Adjusted Vibration Spectrum Images by Mingquan Qiu, Wei Li, Zhencai Zhu, Fan Jiang, Gongbo Zhou

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Effect of Strong Magnetic Field on Competing Order Parameters in Two-Flavor Dense Quark Matter by Tanumoy Mandal, Prashanth Jaikumar

“…Our results suggest that in the two-flavor approximation to moderately dense quark matter strong magnetic field enhances the possibility of a mixed phase at high density, with implications for the structure, energetics, and vibrational spectrum of neutron stars.…”
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2,4-Dichlorophenoxyacetic Acid in the Gas and Crystal Phases and Its Intercalation in Montmorillonite—An Experimental and Theoretical Study by Claro Ignacio Sainz-Díaz, Nelly L. Jorge, Jorge M. Romero, André Grand, Alfonso Hernández-Laguna

“…The molecular geometry, conformational analysis, and vibrational spectrum of 2,4-D were theoretically calculated using Density Functional Theory (DFT) methods. …”
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Vibration Properties of Submerged Sandwich Cylindrical Shell Based on Wave Propagation Approach: Analytical and Experimental Investigation by Guoqiang Guo, Yinglong Zhao, Anbin Yu

“…Finally, an analysis is conducted on the influence of thicknesses of viscoelastic and constrained layers on vibration spectrum and natural frequency under fluid-filled and -loaded conditions. …”
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Simulation Analysis of A New Type Wheel Brake of Heavy Duty Truck by Xi Chuanpeng, Wang Kai, Li Zhongxun, Gu Xinglong, Li Lulu

“…A kind of wheel brake of a heavy vehicle is studied by using virtual prototype technology.At first,the main parameters of the wheel brake,such as actuation force,brake torque are calculated.The virtual prototype model of wheel brake is simulated and analyzed with the ADAMS software,the obtained total braking torque are consistent with the results from the theory calculation.Through simulation analysis,it can be found each friction plate has its own corresponding braking torque.The surface stress of each friction plate is analyzed by using the finite element software ANSYS,the simulation results is proved by using ADAMS software on the braking torque of the friction plate.Through the simulation analysis,it is also found the influence relationship among friction coefficient,vibration amplitude,vibration spectrum.A new idea to the research method based on virtual prototype for wheel brake optimization is provided.…”
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The research for mechanics stimulation method of nonlinear random vibration based on statistical linear theory by Wang Guodong

“…Through the analysis and research for cases, we calculate the displacement, speed, random vibration spectrum of bridge’s accelerated speed, as well as the influencing situation of axial force. …”
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Analisis Kerusakan Melalui Predictive Maintenance pada Main Drive Raw Mill Indarung II/III by Lukman Alrasyid, Jhon Malta

“…</p>The measuring process of the vibration is conducted through the use of transducer velocity in radial and axial directions on the drive and non-drive components of the RIM03 motor and the symetro gear. The vibration, spectrum, velocity, and speed of rotation are analyzed in the x-Viber. …”
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The Dynamics of Rotor with Rubbing by Jerzy T. Sawicki, Joe Padovan, Rabih Al-Khatib

“…Numerical simulations show rotor vibration spectrum rich in subharmonic, quasi-periodic, and chaotic vibrations. …”
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Analysis and Control of Abnormal Vibration of End Wall on High-Speed Electric Multiple Units by Dan Wang

“…The corresponding peak value at 40 Hz of the vehicle body end wall vibration spectrum is reduced by 85%, and the peak noise is reduced by 12%, The correctness of the mechanism analysis of abnormal vibration in the headwall area is verified, which provides a reference basis for guiding the structural optimization and operation and maintenance of rail vehicles.…”
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Research of Vibration Characteristics of Gear-rotor-bearing System with Compound Faults by Haisheng Feng, Yongqiang Xiao, Baoguo Wu, Jin Dang, Jianping Wang, Fengtao Wang

“…The results show that the vibration amplitude of the healthy gearing-rotor-bearing system is relatively uniform on time domain，and the vibration spectrum mainly consists of the characteristic frequencies of the bearing outer raceway，as well as the meshing frequencies of the gear pair. …”
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Vibration Transfer Path Analysis and Path Ranking for NVH Optimization of a Vehicle Interior by B. Sakhaei, M. Durali

“…The procedure shows a good ability of vibration path ranking in a vehicle and is an effective tool to diagnose the vibration problem inside the vehicle. The simulated vibration spectrums in different speeds of the engine have a good compliance with the tested results; however, some incompatibilities exist and have been discussed in detail. …”
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Detection of the Gear Pair with Crack Defects Based on Double-tree Complex Wavelet by Wang Tianyang, Tao Xueheng, Dai Peng, Ran Haifeng

“…However, there are factors such as random vibration and white noise in the working environment of the gear pair, so that the noise is generated in the vibration spectrum of the gear pair, and the defect frequency is submerged, which is not conducive to the identification of the crack defect of the gear pair. …”
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Time-Varying Total Stiffness Matrix of a Rigid Machine Spindle-Angular Contact Ball Bearings Assembly: Theory and Analytical/Experimental Verifications by Fawzi M.A. El-Saeidy

“…For a machine spindle-ACBBs assembly under mass unbalnce and a horizontal force at the spindle cutting nose when the bearing time-varying stiffness matrix (bearing cage rotation is considered) is used, the peak-to-valley variation in time domain of the stiffness matrix elements becomes significant compared to its counterpart when the bearing standard stiffness matrix (bearing cage rotation is neglected) is used. The vibration spectrum of the time-varying matrix case is marked by tones at bearing outer ring ball passing frequency, rotating unbalnce frequency and combination compared to spectrum of the standard stiffness matrix case which is marked by only the rotating unbalnce frequency. …”
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