In this paper, the time domain collocation method (TDC) is applied to solve the van der Pol equation. The results obtained by the TDC are compared with the results by the traditional harmonic balance method (HB) and high dimensional harmonic balance method (HDHB). For the extended TDC method, appropriately...

A large number of cracks were found in the gear box of high speed train in practical applications. According to the line test, the weak position was got and the reason of cracks was researched. The influence of the different vibration source on the weak part was studied by means of vibration spectrum...

We make a dynamic contact analysis for a pair of gears in the first stage device of the RV reducer by the 3 d modeling software Pro/E and the finite element analysis software Abaqus. The simulation results are the dynamic changes of the stress distribution on the tooth and the results are compared with...

It will seriously affect the safety of tunnel structure if tunnel occurs longitudinal deformation. This paper is based on the shield-driven tunnel, discusses the factors may cause longitudinal deformation of metro tunnel and carries on the concrete analysis during construction period to operation period...

The paper obtains the equivalent stress of the two kinds of flexsplines after inserted into the wave generator according to the principle of harmonic gear reducer and using finite element method got different flexspline models with different length and length of the gear tooth to study how these factors...

Based on the analysis of structure composition, material properties, operating conditions of bleed air system, a finite element model is developed and the natural frequencies and vibration modes are obtained by NASTRAN. The results show that the first ten natural frequencies comparatively dense, each...

Aiming at the frame strength of the load isolated pure electric vehicle (LIPEV) which is modified by a micro truck, the three-dimensional model of the frame was established based on UG. The finite element analysis model of the frame was established based on ANSYS. The load before modified and the load...

Under the different axial compression ratios,testing the two intermediate nodes low cycle loading of the all-lightweight aggregate concrete frame beam-column node.Research the aseismatic performance of all-lightweight aggregate concrete frame beam-column node.Analyse the rebar strains of beam-end and...

This paper presents a method for large deformation analysis for flexure hinged displacement amplifier by minimum potential energy. The flexure hinged displacement amplifier is widely used in micro electromechanical system, micro manipulation, gyroscopes. Different from conventional hinge, monolithic...

This paper proposes a predictable method for mechanical performance of cold rolled ribbed steel bars based on BP network with dividing variable space according to original materials’ tensile strength. It builds a sample variable space partitioning model according to the original materials’ tensile strength....

The traditional valve orifice system had some shortages like: loose structure, more throttling loss, low efficiency and affected highly by operating frequency, then proposed and adopted a new type of rotating-sleeve distributing-flow system for reciprocating plunger pump. Established the kinematic characteristic...

The secondary internal force caused by temperature in statically indeterminate bridges are usually huge, sometime is the control factor in bridge design. Since the temperature investigation of bridge construction site is difficult to predict, there deviation between design joining temperature and actual...

This paper use Midas to build the three-dimensional research model on varied construction stages of foundation pit, in which the foundation pit applies the scheme of combing continous wall and inner support. In geotechnical engineering, the support pattern regularly applied is continuous wall, whose...

The 1:4 scale model for shaking table test was designed as a typical three-storey-office building strengthened with external steel reinforcement mesh mortar layer. The process of modeling was provided, including the relationship of model and proto structure, and the design principle of model components....

The steel framework of a utility boiler was an important structure sustained loads, and its strength and stiffness were primary factors in structural design. Stiffness was assessed by measuring perpendicularity of pillars. For this steel framewok seismic loads was significant to the entire strength....

Taking the project field as background, the paper studied the supporting technology of mining gateway with weak surrounding rock in 3-1 shallow seam mining of a coal mine, and solved problems of mining gateway slide and roof deformation and failure. The shortage of original supporting system was simulated...

In light of the coal roadway deformation and breakage problems in soft rock conditions under dynamic pressure influence, based on coupled-supporting principle, combined theories and computer numerical simulation, the floor heave and spalling mechanism under the influence of multiple mining activities...

Through analyzing the dynamic disasters of KuZiDong mine 111303 working face in this paper,aiming at the high stress and low gas working face,that ucsing Composite regional measures of "the gas pre drainage standard before mining and effectively reducing the coal seam rockburst tendency through water...

Trimaran is of three hull, three slender hull share a main deck and the upper structure, which has many superior qualities, compared with the single ship, aroused people's great interest. In the design of the main concern is to reduce the resistance of trimaran, therefore, to study the effect of convection...

Offshore wind farm monitoring results show that: Spectrum fan running in the underwater noise level substantially are more similar to the overall strength significantly smaller with increasing frequency, in 1 ~20kHz frequency distribution of the power spectrum level 140dB/1 Pa to 65dB/1 Pa, at 120Hz...

In this paper, natural frequencies of axially moving beams on fixed supports are analyzed based on Timoshenko model by performing the Galerkin method and the differential quadrature method. Some numerical examples are presented to demonstrate the effects of related parameters on the frequencies, such...

To explore the influence of sea level rise on sediment deposition in the Yangtze Estuary Deep-water Navigation Channel, this article has simulated the change of flow velocity in North Passage in different situations of sea level rise with MIKE21 FM and calculated the threshold motion velocity of sediment...

The ability of a 2-stage (filtration + UV/Ag-TiO2/O3) ballast water treatment process to control non-indigenous species introduction has been assessed. The removal efficiencies of turbidity and phytoplankton were monitored during the filtration pretreatment phase, and the degradation of phytoplankton...

This paper is based on a diversion tunnel excavation project, the rheological stability analysis was carried out on the excavation process. Due to large buried depth, tectonic stress and stress have influence on the safety of engineering. Based on the theory of unloading rock mass and rock rheology theory,...

This paper in view of the architectural design of hospital inpatient department, has carried on the analysis from various aspects factor changes of medical model of historical development, social environment, national policy, the philosophy of nursing progress, society of spectrum of disease and medical...

A state space solution for a partially embedded pile under combined lateral and vertical loads is developed. Two sets of state space equations above and below ground are deduced from Euler-Bernoulli’s and Winkler’s linear elastic foundation beam theories respectively, in which the coefficient of sub-grade...

According the bridge 132 meters long tapered continuous curved box-girder bridge as the research object. Divide the continuous beam bridge models into vertical bending, pure torsion, lateral bending and longitudinal movement of the four sub-direction. Each energy of the vibration mode also divided into...

The kinematic wave equation is selected to describe one-dimensional overland flow. The Lattice Boltzmann method which different from macroscopic numerical methods is introduce to solve this partial differential equation. By comparing to analytical solution, good fitting results are got. In addition,...

Based on Weijiadi mine No.2 cross-cut West water storage repairing engineering, through on-site investigation, theoretical analysis, FLAC numerical simulation, field tests and monitoring metheds to study The Supporting Technology for Repairing the Main Roadway in Mine under Complicated Conditions, the...

As Jining City integrated gymnasium suspend-dome structure an example, the prestress tension process was carried out finite element simulation analysis by using inverse analysis of construction. The vertical displacement of the control joints and the top rod maximum stress ratio of roof were comparably...

Aiming at the common asphalt pavement structure combination, large general finite element software is used to build the three-dimensional model based on the multi-layer elastic system theory. The pavement structure vertical displacement and stress are analyzed entirely under the even speed moving load....

Aiming at the common asphalt pavement structure combination, large general finite element software is used to build the three-dimensional model based on the multi-layer elastic system theory. The pavement structure vertical displacement and stress are analyzed entirely under the moving load. The results...

At present, rarely research is done about the loading process of cable net curtain wall with spring mechanism, therefore, how to select the spring stiffness at the cable end and what role the spring play in the process of loading become the very concern for curtain wall designers. Therefore, based on...

In the process of use, cold-formed thin-walled steel composite floor should undertake the upper floor vertical load, transfer wind load and seismic force to the shear wall, so that the composite floor must have good bearing capacity. However, using theoretical derivation to calculate the bearing capacity...

The post-construction settlement of soft soil subgrade is one of the main problems of railways and highways that troubling builders and designers. Reducing the post-construction settlement has a great significance. This article presents the treatment and precautions of design. Finally, it gives a brief...

Tunnel engineering is an important part of the development and utilization of underground space especially in the city. To alleviate traffic pressure, improve the efficiency of traffic greatly. This paper will use the numerical simulation software FLAC3D, to simulate the Subway tunnel excavation. Analysis...

In this paper, we investigate the oscillation of second-order half-linear neutral dynamic equations with distributed deviating arguments. By using the generalized Riccati transformation and the inequality technique, we establish some new oscillatory criteria for all solutions to second-order half-linear...

For the characteristics of that the center of mass and stiffness centre do not overlap and that presence of translational and torsional vibrations under earthquake to the eccentric structure, MRE damper is used to control the translation-torsion coupling effect of eccentric structure under seismic action....

Bracket has experienced vicissitudes for hundreds of years in Chinese traditional wooden architechture, so that the natural color on its surface had long been faded, however, the marvelous sculptures on it has always been suggesting that the lives of the ancients and it is the fantastic designs exquisite...

Running is the cantilever method is adopted in the study of the construction of continuous rigid frame bridge construction monitoring.The bridge with high pier and large cross-border, narrow bridge deck and other characteristics, high construction requirement and great technical difficulties.According...

Quality evaluation of bridges stopped building for a long period in highway extension projects is not only critical to re-recognize quality (precondition for follow-up construction) but to adopt treatment measures for bridges. Nevertheless, studies on this issue are quite few at home and abroad so far....

The delay precision of common detonator is not good, the actual time delay often have big difference with blasting design in real blasting engineering, and the blasting effect is difficult to control. While high precision digital detonators are instead of chemical drugs by original electronic control...

In order to deeply understand the loading characteristics of the subway station and summarize the factors that influence the loading of the structure,we need to adopt the method of simulation to analyze the loading of the structure.The main structure static is simulated in ANSYS using an example of interchange...

In recent years, the complex high-rise buildings are increasing.The complex structure and transfi-nite structure often need to adopt the medium earthquake design. This paper first introduces the concept and design method of the medium earthquake design.Then,take a taransfinite frame shear wall structure...

At the two embedded solid depth, research on the displacement, bending moment and shear stress of micro-pile composite structure have been studied based on the FLAC3D program. Results show that: micro pile maximum bending moment occurs in the vicinity of the sliding surface, the maxi-mum shear stress...

According to the surrounding environment condition, the rock engineering site condition and the excavation depth, soil-nailing wall as its main form combining with the practical engineering case.the paper introduces the characteristics of the engineering and design soil-nailing wall excavation and check...

This article mainly analyses different representations of bridge seismic damage and their causes, discuss mostly the analytic means of bridge structures’ elastic-plastic earthquake response and the design method of ductile earthquake-resistance. In the end, the developing trends of the method in future...

In this paper the measured blast vibration signal of tunnel between Huaxin station and Huangmugang station of Shenzhen subway line 7 was analyzed, with blasting excavation way of benching tunneling construction method using different maximum charge of explosives. The peak vibration velocity and main...

Spherical composite ribbed shell is made of thin reinforced concrete shell and composite ribs, which has many advantages such as large span, high rigidity, and large bearing capacity and low cost. It is one of the urgent issues to considering the mechanical performance under dynamic loading. Based on...

During mining the high stress soft coal seam, usually adopted traditional method should leave large width coal pillar, which cause severe loss of coal resources, at the same time due to the system stiffness of the high stress soft rock roadway surrounding rock is very low, the plastic deformation is...

The emphasis of this paper is to study the high frequency dynamic characteristic of high-power transducer based on giant magnetostrictive material. A prototype of high-power magnetostrictive transducer using in kHz magnitude frequency situation is introduced. The accurate inductance relation in magnetostrictive...

Thin-walled cylindrical shells under axial compression are commonly found in a wide range of civil engineering steel shell structures, including silos, towers, chimneys and tanks. Buckling of axially compressed cylindrical shells has been one of the most active areas of shell buckling research. The purpose...

In this article, the volume average method of fluid flow in porous media is introduced and the unit volume resistance is analysed, then the Brinkman-Forchheimer extended Darcy model is obtained. Numerical results of fluid flow in porous media are solved, numerical results show that fluid flow in porous...

In this article, the porous media fluid flow experimental apparatus and five groups of solid particle parameters containing porous media are introduced. And the friction factor curve is drawn along with the change of Reynolds numbers according to the pressure drop-flow relationship. According to the...

Shake table test is considered to be a very intuitive and efficient way of studying structure seismic response. With more long multi span bridges been built and a larger proportional scale structure tests are towards, the capacity of shake tables and table numbers are insufficient. Sacrifice has been...

The interactions of structure-human and those of human-human would change the macroscopic behavior of human walking on the structure and which, would further result the change of walking forces. The complexity of walking forces during the interaction process is the reason that lively structures exhibit...

Because of its own characteristics and the complexities of driving conditions, Tractor-Semitrailer easily produce shimmy when driving at the high speed. In order to effectively control the high-speed shimmy of Tractor-Semitrailer, differential braking control strategy based on sliding mode variable structure...

In order to research the Influence of the strength of the filling body on the surface subsidence and deformation, with the 10203 working face of Xinyang Mine as the background, based on the numerical simulation software of FLAC3D, when the filling rate was 90%, the Influence of the strength of the filling...

The article deals with the stress-strain state of layered composite of rectangular section under tension by distributed uniform normal load q. Interaction between layers is accomplished by the contact layer in which is mixed the substances of adhesive and the substrate.

The moving blade adjusted axial fan is used in the icing wind tunnel, controlling of rotation rate and adjustment of angle of blades in the static state to achieve the test Mach (Ma) number in the kinds of condition. The axial fan should have the following advantages: wide range of speed regulation,...

In accordance with the principle of arc expansion and the displacement of projection, the demo and curve model of relationship between tangent and cotangent function shall be designed and drawn. The paper introduces the composition structure of the model, analyzes the main parameters of the system and...

Based on the theory of fluid network, the mathematical model of the self-excited oscillation pulsed water jet device was established, theory analyses the frequency characteristic of self-excited pulsed water jet nozzle on double chambers. The result shows that structural parameters greatly affect natural...

In this paper, the bracket of certain electric equipment was designed by considering the vibration and shock environment. According to the design requirement of vibration and shock, the stiffness of the isolator was set as the design variable. The mathematic optimal model of getting the largest stiffness...

The flowing condition and the pressure on inner surface of ethylene in the 90°elbow pipe were simulated by means of FLUENT software, on the condition of 4 kinds of fluid density , fluid inlet velocity v, fluid outlet pressure P0, degree curvature k=R/d respectively. The database of elbow pipe pressure...

This article used CFD method to simulate features of air organization in dome cinema in summer, and analyzed the temperature field, velocity field, and comfort under different designs of ventilation. The result showed that using ground air supply in large space building could be easy to satisfy the thermal...

The bridge is an important transportation hub, especially the bridges on the main traffic arteries. Once the bridges are subjected to earthquake damage, there will have a great impact. Therefore, it is necessary to study the earthquake damage prediction of bridge engineering. The prediction will ensure...

There are lots of methods used to measure the rotational inertia; however, very limited measures can be adopted to measure in a high precision manner the rotational inertia of rocket projectiles of ultra large diameter. Based on this situation, the paper has put forward a method called Torsion Method...

Using the principal component (PCA) strong ability of extracting effective features of foundation pit horizontal displacement monitoring data (monitoring, monitoring temperature, relative humidity, excavation depth) characteristics analysis .extracting the effective principal component, constructing...