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The oil derrick structure which is the main force bearing component in oil production, to take safety assessment on it has important realistic significance. Through random reduction method to get free vibration response of the derrick structure under ambient vibration, and using the ITD method to carry out modal parameter identification on multi-points impulse response data. numerical simulation analysis...
Based on parameterized modeling and meshing of ANSYS on gear, finite element modeling was analyzed through applying the torque to the gear, and tooth trace was designed by quadratic curve. The results indicate that gear of tooth modification may enhance gear's contact intensity.
Complicate products are represented by a number of trimmed surfaces during the digitized modeling. Mesh generation of a trimmed surface is an important research subject in Computational Geometry. According to the geometric definition of a trimmed surface, numerous researchers adopt a method that generates meshes on trimmed surface by trimming meshes on non-trimmed surface. However, this approach can...
The paper presents the natural frequencies and mode shapes of a clamped square flexible plate based on the Finite Difference (FD) and Finite Element (FE) methods. Finite Difference Method is implemented using MATLAB software whereas the Finite Element Method is implemented using ABAQUS software and the results are compared with the available analytical results. It is found that the improved Finite...
1-3-2 composite is made of 1-3 composite and ceramic base. The influence of piezoelectric phase volume fraction and composite aspect (thickness/width) on resonance characteristic of square 1-3-2 piezoelectric composite plate has been researched in ANSYS. The resonance frequency of 1-3-2 composite samples was investigated. The result shows that when the volume fraction of ceramic rods is about 0.46...
In order to minimize the uncertainty of direct current comparator (DCC), the effect of interfering flux on DCCs is investigated here. Some important concerns are studied, such as the number of bus-bars, the window shape of bus-bars, the distance between the bus-bars and core, etc. The investigations are performed by finite element method (FEM). The results show that the bus-bars should be configured...
In this study both finite element modeling and experimental techniques are employed to study the reliability of electronics components under random vibration loading conditions. A fatigue life estimation procedure, that would help analyst to make relatively accurate prediction of induced fatigue life, Finite Element model of the test vehicle is built using ANSYS software. The model is first validated...
The combination of ANSYS and ADAMS can improve the precision of system simulation. In this paper, first, a cable-stayed space truss, consisting of stay cables, columns, and the space truss, is built in ANSYS. Second, the modal neutral file (mnf) needed in ADAMS is generated by executing the macro command “ADAMS” and then imported into ADAMS software. Third, the flexible body in the mnf file is connected...
Finite element method (FEM) has become an effective means on metal cutting mechanism research, in recent years. But the simplification of the cutting tool and work piece model is immaturity, most FEM cutting model is confined to two-dimensional sharp. Based on simplification of cutting process, the key technology of contact setting for cutting tool and work piece with general finite element analysis...
Based on the study of the mechanics features of air spring including the nonlinearities in material, geometry, contact, the nonlinear finite element analysis was applied to study nonlinearity characteristic of air spring. The three-dimensional finite element model of a cystiform air spring was established with the method of nonlinear finite element analysis. The analytical results were confirmed by...
Modeling by FEM, finite element method, is a new product modeling method, through level-constraint of parameter conditions of different anchors to get designed boundary line, and thus makes positive influence on front modeling methods of product design. Access to designed constraint boundary line affected by many factors, this evaluation based on the cognition system of existing model as well as the...
The sizing pressing process has been simulated using finite element method. Two typical anvil profiles in practice and three additional newly designed profiles are used in the simulation to systematically study the effect of anvil shape on the metal flow pattern. Base on the simulations of different anvils, the parametric studies of dog-bone deformation, end fish-tail profiles and width necking at...
In the current analysis numerical and fuzzy methods are adopted for detection of damage in a cracked beam structure containing transverse cracks. Based on the flexibility produced due to the crack a new stiffness matrix is deduced and subsequently that is used to calculate the natural frequencies and mode shapes of the cracked beam using numerical method. The fuzzy inference system is designed by...
In order to protect electronic components on a Printed Circuit Board (PCB) against electromagnetic radiation/wave, a shielding in the form of an electrically conductive shield-can or box is normally attached on the PCB covering the electronic components. The attached shield-can could provide an additional mechanical strength and minimize the out-of-plane deformation especially where the electronic...
To improve the fatigue life of a panel with grooves, the stress relief groove is added after machining the tangent round transition structure. The purpose of this method is to reduce the stress concentration at the edges of rounded transition structure in the present study. To confirm the effectiveness of the method, analyses were performed by using software for two-dimensional elastic problems based...
To investigate the pull-in phenomenon of electro-static micropump, the mechanical behavior of an electrostatic micropump employing a circular membrane is studied using a reduced order model (ROM) of membrane, which is constructed based on numerical calculation and mode superposition method. Comparing the results of ROM with the results calculated by 3D finite element model, it shows the ROM sped up...
Deformational control is a critical problem for composite structures, especially for complex geometry composites. This paper presents a new anti-deformation compensation method to decrease the deformation for the polymer matrix fiber reinforced composite parts. The new method uses a mathematical model way, and includes a dimension predication model and an anti-deformation compensation model. The dimension...
By theoretical analysis and iterative trialing, based on routine isoparametric coordinate transformation method, a new compatible rectangle thin plate element is developed in the paper. At the same time, compatibility and completeness of the element are proved theoretically. Numerical analysis results show that the compatible element is higher accuracy and better convergence than the incompatible...
This paper describes a meshless approach to obtain accurate solutions for propagating microwave problems. The Meshless Local Petrov-Galerkin (MLPG) method, with the Heaviside step test functions and Radial basis point interpolation method (RPIM) shape functions, is used. Results are obtained for a two-dimensional model and are compared with a consolidated Finite Element Method (FEM).
Differential evolution (DE) is a heuristic optimization method used to solve many optimization problems in real-valued search space. It has the advantage of incorporating a relatively simple and efficient form of mutation and crossover. However, the operator of DE is primarily based on floating-point representation only and is difficult to apply to binary-based optimization problems. In this paper,...
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