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Used the program, ANSYS, finite element model of the rung-shape long-span tensile cable-membrane structure in Foshan Century Lotus Stadium was conducted to investigate its dynamic characteristics and its mechanics performance under seismic loading. Results indicate that the natural frequencies of the structure are all lower and concentrate in a small range, and its jumping phenomenon isn't in evidence...
Collaborative Optimization (CO) strategy is applied to aseismatic design of reinforcement concrete bridge. The design procedure is regarded as a whole system. The procedure is decomposed into a double-level nonlinear optimization problem. Besides system level, disciplines level is subdivided into three disciplines in term of stress states of the bridge: statics discipline, linear dynamics discipline,...
Based on the section-forming characteristics, structure-assembling method and load-bearing mechanism of the trapezium corrugated plate-assemblies arch steel roof, the finite element models for local buckling and overall buckling analysis of the structure with proper boundary conditions were set up. The interactive local buckling modes of the trapezium corrugated sections with different width-to-thickness...
The change of screw assembly stress and bearing preload on inertial platform system is the main cause of inertial platform system parameters drift such as constant drift and angular misalignment. The paper appropriately simplifies the complexity structure of the inertial platform system components, discusses the inertial platform system screw assembly stress and bearing preload finite element modeling...
The nature frequencies and mode shapes of flexible structures will be influenced by its large deformation and stress under the effect of loads. The numerical method is used in the dynamic analysis which has considered the influence of fluid-solid interaction, initial tension and the effect of large deformation. The results show that initial tension and large deformation effect have great influence...
The finite element model of upper beam is established. Using deformation and quality as structural performance evaluation indicator, the key parameters that affect upper beam's structure performance are screened out. Obtained sequence of parameters that affects the structure properties of upper beam is as follows: upper and lower plate thickness, upper beam height, thickness of middle cross-plate,...
Based on the pitting corrosion characteristics of corroded deformed steel bars embedded in concrete structures in chloride environment, the Finite Element fine Model is established by the ANSYS FE software, and nonlinear analysis was conducted for the influence of corrosion pit on the resistance properties of steel bars. Results show that the effect of pit location is apparent on the mechanical properties...
A finite element model for supercavitating underwater vehicles is developed considering the effect of the connection surfaces between cabins on the structural dynamic response. The frequency and transient dynamic analyses are performed, and the performance of supercavitating underwater vehicles with configurations of flanged and sleeve connections is investigated. The numerical results show that the...
The construction of the Steel Suspension Box Cofferdam (SSBC) is an important procedure for constructing the pile cap. In this paper, a safety analysis is carried out based on the construction of Chongqi Yangtze River bridge primary NO.2 pier SSBC. First, all calculation construction conditions and the corresponding loads are clarified. Second, with the use of ANSYS finite element analysis software,...
Finite element model of crossbeam of GMCU2060 gantry machine center is proposed, the static and dynamic stiffness is analyzed by using finite element analysis. The weak link of the crossbeam is discovered and a modification scheme is put forward for the design of the crossbeam structure. The analysis shows that the maximum deformation of the improved crossbeam is decreased to 0.03 mm and the first...
The acoustic numerical value simulation is significant for reducing rail-wheel noise, the effect of damping layer on reducing vibratin and noise can be validated basing on the acoustic numerical simulation. The finite element model of wheel vibration is built, the wheel vibration response is calculated by use of FEM. Then, the vibration velocities of wheel surface are extractd and are used as boundary...
The purpose and significance of bridge health monitoring is described in this paper. Principle of empirical mode decomposition (EMD) and concept of shape factor are introduced. In order to study bridge health monitoring, Firstly, a finite element model for simply supported steel beam is set up on the basis of the Infinite Element Theory and the software ANSYS in response to laboratory experiment....
A finite element model of a long-span S-shape curved continuous rigid-frame bridge with high piers is established. Structural dynamic response under different seismic excitation angles and multi-support excitation is calculated and analyzed. The results indicate that seismic excitation angle and multi-support excitation have significant effects on the structural response. When the apparent wave velocity...
Three finite element (FE) models were compared for a self-anchored suspension bridge in order to obtain the appropriate analysis model that provides the basis of long term monitoring and safety evaluation for the bridge. The shell element and two types of beam elements based on grillage method are used to simulate the steel box stiffening girder of the bridge. One of the beam elements is the element...
In this paper, we aim at obtaining the deformation law and the mechanics characteristic of the supporting structure of ∞-Shaped super deep foundation pit, including the deformation law and the plastic zone of the soil outside the structure. Based on the example of ∞-Shaped super deep foundation pit for South Anchor of the Fourth Nanjing Yangtze River Bridge construction, the full three-dimensional...
With a practical project, the finite element model of a steel arch bridge was established; the linear elastic and geometric nonlinear analysis was discussed by numerical method, indicating the bridge has more reliable buckling stability. Instability modes of the structure are all vertical arch rib plane instability, indicating that the lateral rigidity of arch rib is weaker than tie beam. Some valuable...
Temperature warping stress and vehicle load will lead the fatigue failure of the concrete pavement. Simulation of the finite element model with different parameters was obtained, and analyzed the effect of the concrete pavement with different parameters. The temperature stress in the concrete pavement slab is increasing notably by the increasing of the length and thickness of the slab and foundation...
It is effective to overcome the difficulty of selecting the weighting factors in finite element model updating by using multi-objective optimization technique. However, the present updating methods based on multi-objective optimization technique is difficult to be applied to update the finite element model of civil structures by reason of low efficiency. To develop an efficient multi-objective updating...
Based on load incremental approach, finite element model of inclined truss structure is established by using Ansys software. Then load factor, unit of effective strength and load increments is obtained by finite element analysis. With a minimum load increment norms and the branch - bound norms of the stage critical strength, the main failure modes of inclined truss structure is educed. Finally the...
A new method based on best achievable flexibility change is presented in this study for structural damage localization. The algorithm makes use of an existing finite element model of the “healthy” structure and a subset of experimentally measured modal parameters of the “damaged” structure. Central to the damage localization approach is the computation of the Euclidean distances between the measured...
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