Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong

Yantai, China

Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong

Yantai, China
SEARCH FILTERS
Time filter
Source Type

Yu T.,Yantai University | Yu T.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong | Yu T.,Dalian University of Technology | Wang J.,Yantai University | And 5 more authors.
Zhendong Ceshi Yu Zhenduan/Journal of Vibration, Measurement and Diagnosis | Year: 2014

Using the finite element method, the dynamic model of the rotor system with damage of slowly varying mass is proposed. By extending the rotor system with slowly varying mass to the rotor system with generalized inertial damages, the dynamics of the rotor system with slowly varying mass subjected to abrupt phase change are studied. In addition, the dynamics of the rotor system with slowly varying mass subjected to rubbing faults with different rubbing levels are studied by combining the three dimensional orbit. The specific characteristics of the rotor system with rubbing fault while taking the slowly varying mass into consideration are given. The results can be referred to as dynamics of the rotor system with inertial damages and diagnosis of corresponding faults. ©, 2014, Nanjing University of Aeronautics an Astronautics. All right reserved.


Duan C.,Shandong Business Professional College | Shi W.,Yantai University | Shi W.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong | Yu T.,Yantai University | Yu T.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong
Jixie Qiangdu/Journal of Mechanical Strength | Year: 2012

Fourier series expansion technology, standing wave expansion of the plane wave and Graf addition formula were used to deal with the complex integrations of the plane wave functions and scattering wave functions frequently appearing in the scattering problems about P-waves and SV-waves and SH-waves. These integration theoretical solutions can avoid the phenomena of low convergence speed, large computation and low computation precision often appearing in numerical integration computation, they can supply theoretical bases and results for programming high efficient, reliable computing software of elastic wave scattering.


Liu Y.,Shandong Business Professional College | Shi W.,Yantai University | Shi W.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong
Jixie Qiangdu/Journal of Mechanical Strength | Year: 2012

Complex method and multi-coordinate transformation and Graf addition formula were used to study the fuzzy scattering problem of SH (shearing horizontal) wave to the circular elastic inclusion in right-angle plane in which the wave number is fuzzy number. At first, the free wave functions of the complete right-angle plane in which no circular elastic inclusion exist and the scattering wave functions were given with the help of stress-free conditions on the two boundaries of right-angle plane. Then, the infinite linear algebraic equation systems of unknown coefficients appearing in the scattering functions were given with the help of the stress and displacement conditions on the boundary of the elastic circular inclusion and Fourier series expansion and Graf addition formula. In order to use the fuzzy information of the fuzzy wave number, the wave number was regarded as fuzzy parameter, its support was equal-divided, the expanding principle and the determinate method were used to obtain the fuzzy responses and their memberships. Practical computations show that the algebraic given here has a fast convergence speed and a high computation precision and a stable numerical results, it can overcome the difficulty in solving the fuzzy wave responses' memberships.


Chang F.,Shandong Business Institute | Shi W.,Yantai University | Shi W.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong
Jixie Qiangdu/Journal of Mechanical Strength | Year: 2012

Considering the uncertainty of the structure and the performance parameters of the large deformation bending beam, the interval mathematical analysis method and the differential equation theory are adopted to study the non-linear deflection differential equation, the integration equation which the beam section rotation angle satisfies is given and the high precision approximation interval solutions of the deflection and section rotation angle functions of the bending beam are obtained with the use of the Gauss-Legendre integration formula and one-order differential equation theory and numerical interpolation method, the conclusions can supply the reasonable and safe constraint conditions, take the cantilever beam on which a point loading and uniformly distributing force acting as example, the deformation and the rotation angle of the beam are studied numerically, the results show the effectiveness and feasibility of the method introduced here.


Shi W.-P.,Yantai University | Shi W.-P.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong | Wei J.,Yantai University | Wei J.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2014

Multi-coordinate transform, Graf addition formulae and wave function expansion were employed to study the Green function solution of SH-wave scattering of several circular cavities in circular domain under a steady out-of-plane pulse acting on the outer boundary of circular domain. The scattering wave function of each circular cavity in the circular domain was presented, and the superposition principle was used to give the total wave field of the circular domain medium. An infinite linear algebraic equation system of unknown coefficients was derived according to the boundary conditions of the problem by using Graf addition formulae and Fourier transform, and then solved by limited terms truncation on the basis of the requirement of computation precision. The Green function solution was thus achieved. The results of a given example show the feasibility of the method proposed.


Yu T.,Yantai University | Yu T.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong | Yu T.,Dalian University of Technology | Liu W.-T.,Yantai University | And 3 more authors.
Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology | Year: 2015

To establish three-dimensional models of teeth and the association between teeth and alveolar bones. It also verifies the models by FEA on single tooth, so as to provide theoretical references and practical basis for the three-dimensional models reconstruction of medical images. Using CT image data in DICOM format, three-dimensional substantiality models of teeth was constructed by software 3D-doctor. The model has been imported into ANSYS. The occlusal loads were simulated and stresses were calculated. Three kinds of three-dimensional models were established, including two root of tooth, three root of tooth contain the missing image layer and the association between teeth and alveolar bones. It can be reflected three-dimensional structure of the teeth internal and external. The method of using related approaching layer to substitute missing layer, which could establish complete three-dimensional model of the teeth without deletions and discontinuities. Upper and lower dental pairing, can clearly and accurately reflect the occlusion of teeth. It can reflect three-dimensional structure of the teeth internal and external by establish visualization model. It can simply and effectively analyze the stress and strain of teeth by using finite element analysis, provide theoretical basis for clinical application. ©, 2015, Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology. All right reserved.


Yu T.,Yantai University | Yu T.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong | Yu T.,Dalian University of Technology | Wang J.,Yantai University | And 5 more authors.
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2014

A dynamic model of simplified-concentrated-mass based Jeffcott rotor system with slowly-varying mass was built. An analytic processing for rotor system with slowly-varying mass was introduced by adopting the asymptotic method. Analytic solutions of the rotor system responses were deducted detailedly. With the analytic solutions and reassigned morlet scalograms, the nonlinear dynamics behaviors of rotor system with slowly-varying mass were discussed. The specific nonlinear dynamic characteristics of rotor system with slowly-varying mass can give a reference to the research on slowly-varying parameter system and diagnosis of corresponding faults.


Zhang L.,Yantai University | Zhang L.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong | Li S.-C.,China University of Petroleum - East China
Rare Metals | Year: 2015

In the present study, two models of atom occupation in LaNi4Co were put forward and corresponding valence electron structures (VESs) of these two models were investigated according to empirical electron theory (EET) of solids and molecules. Results demonstrate that the VES-concerned hardness factor (FH) of LaNi4Co is lower than that of LaNi5, so LaNi4Co has lower hardness, higher plasticity and improved anti-pulverization ability. In the mean time, the difference of the equilibrium hydrogen pressure between LaNi4Co and LaNi5 was analyzed in the electronic level. The analysis shows that the strength of the weakest bond net in octahedron lattice interstices of LaNi4Co is much lower than that in LaNi5; consequently, LaNi4Co’s bond net easily deforms to accommodate hydrogen so that LaNi4Co has lower equilibrium hydrogen pressure in comparison with LaNi5. The results can provide some theory guide on the design of hydrogen storage alloys. © 2015, The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg.


Jiang F.G.,Yantai University | Jiang F.G.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong | Zhu B.,Yantai University | Zhu B.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong | And 4 more authors.
Advanced Materials Research | Year: 2012

Roundness error is widely measured in machinery industry, but existing roundness error measuring instruments have much weakness such as single function and low intelligent level, etc. Aimed at the shortage of traditional roundness error measuring instruments, the roundness error measuring system based on virtual instrument is developed. This system which takes NI LabVIEW8.5 as development platform, evaluates roundness error with the least square method, adopts modular design, combines with 610H IPC, PCI-1716 data acquisition card, stepping motors, LVDT sensor and other hardware can realize fast, precise measurement of roundness error of shaft parts. It is verified to be feasible by measuring standard parts. Compared with the similar product, this system has many advantages such as simple operation, intuitive display, high intelligent level and so on. © (2012) Trans Tech Publications, Switzerland.


Tang Z.T.,Yantai University | Tang Z.T.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong | Yu T.,Yantai University | Yu T.,Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong | And 2 more authors.
Advanced Materials Research | Year: 2014

The machining deformations caused by the release and redistribution of original residual stresses were studied by the theoretical analysis and finite element method. The research results show that the release and redistribution of original residual stresses result in machining distortion of the plate part. There exists an optimal value of material removal amount according to original residual stresses. When the amount of the material removed exceeds the optimal value, the machining deformation can be controlled effectively. © (2014) Trans Tech Publications, Switzerland.

Loading Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong collaborators
Loading Key Laboratory of Advanced Manufacturing and Control Technology in Universities of Shandong collaborators