In order to analyze influence of subgrade defects on the dynamic characteristics of ballastless track subgrade, a three-dimensional finite element model of the CRTSâ…¡ ballastless slab track subgrade was establisbed, vertical vibrational displacement and acceleration of sugrade were calculated in consideration...

The bending-torsional coupling effect of a curved bridge is so obvious. To explore the effect of the curvature radius to a curved bridge, the WuJiaWan Bay Bridge is taken as an object of analysis. The bridge is made up of high piers and long-span continuous ridge frame. The relationship of a whole curved...

In order to understand the deformation mechanism on the pipeline in steep longer distance seams mining, taking one coal mine as case study, where the gas pipeline from Shanshan to Urumqi, in China is laid across. FLAC3D was adopted to study the deformation mechanism on the pipeline. The simulations reveal...

This paper derived an approximate deformation analytical solution of a circular hole which is parallel to the isotropic plane of the layered rock mass. The data comparisons of approximate solutions and numerical solutions are conducted in different radii and stress conditions through the FLAC3D software....

The object of this paper analyzes the reliability level of pre-stressed concrete continuous girder bridges designed with the Chinese code (JTG D62-2004) and AASHTO LRFD (2007) using incremental launching method at construction stage. Typical cross-sections used in the example bridge are considered at...

Through theoretical analysis, this paper deduced the optimal slenderness ratio and calculated length of the angle steel. According to the actual stress conditions, this paper figure out the optimal slenderness ratio and calculated length of the large angle steel, large double angle steel, ordinary double...

Based on the vehicle load survey data measured by High speed dynamic weighing equipment in Luogang Section of National Highway No.107 and the basic theory of probability and statistics, the parameters such as gross vehicle weight, axle load, wheelbase, vehicle spacing and so on，are statistically analysed...

In this paper, based on the chemo-thermo-poroelasticity model of saturated porous medium undergoing the local thermal non-equilibrium (LTNE) conditions, the pore pressure and chemo-thermal stresses around a cylindrical hole in an infinite fluid saturated porous medium subjected to sudden variations for...

To effectively assess the reliability of aero-engine main fuel accelerated regulation system under poor failure statistics information, a fault tree analysis method based on interval model is presented. Firstly, according to main fuel accelerated regulation system principle and failure mechanism, the...

Low-rise buildings such as lightweight portal frames are often very susceptible to wind effects, owing to their light weight and large span. The numerical simulation analysis of fluid-structure interaction of low-rise lightweight buildings with different roof pitches is performed by ADINA to investigate...

Subsea tunnel construction has become the prevalent tendency connecting countries and districts, Controlling and minimizing the negative influence of channel dredging on tunnel have great significance throughout the tunnel construction and operation phase. So a three-dimensional finite element model...

During the excavation of rock mass with the method of drill and blast, the release of in-situ stress, also known as excavation load on boundary, is traditional a dynamic process, so the inertia and all other dynamic responses induced by the release of in-situ stress cannot be ignored. Compared with corresponding...

Seismic response of municipal solid waste (MSW) landfill under horizontal and vertical earthquakes has been investigated by dynamic centrifuge testing. The MSW was modelled by mechanically representative model waste. The acceleration response at various depths were recorded and used to investigate the...

Effects of aerostatic wind loads on effective elastic modulus and fundamental frequencies of stay cables in bridge are studied by finite element method (FEM). Dynamic responses of stay cables under supports’ excitations are calculated through theoretical method and FEM. Results show that the in-plane...

Based on the principle of dynamic finite element theory, the horizontal axis wind turbine 600kW tower models were established in this paper to study the dynamic characteristics and influencing factors of the wind turbine tower. The author studied three meaningful vibration modes: lateral flexural vibration...

In order to obtain damage evolution characteristics of coal and rock under the compression, conduct uniaxial compression experiment for coal and rock with rigid loading experiment machine based on the acoustic emission. Gather the AE characteristic parameters in the process of coal and rock damage, use...

Considering bending stiffness,an finite element model is proposed to overhead transmission based on Euler beam.In this model,the displacement of the unit beam is represented by assumed mode method,and derived the mass matrix and stiffness matrixof unit beam by using assumed mode method,secondly,deduced...

Bamboo steel is composed of recyclable sinocalamus affinis with rich resources in China, environmentally friendly phenolic resin and moisture. The high-performance multi-purpose bamboo-based fiber composite processed with multiple technologies does not require special care and maintenance in use. Based...

A novel external stimulation oscillator was recommended and its characteristics of high efficiency and easy oscillation were proved by CFD simulation and experiment. The superiority and difference of process mechanism of the oscillator compared with self-stimulation oscillator were analyzed. The geometric...

The simulation model of the large bus was verified by real vehicle test, and simulation test of GB/T6323-2014 was carried out, and the safety and compatibility of the test and square were analyzed. The results show that the controllability and stability test can be completed in the square, but part of...

To improve the performance of one exhaust system, in the article, a exhaust system in the market was conducted by the stress analysis and optimization of the hanger. Firstly, the 3D model was built by Catia and a FEM model was built by Hypermesh , and then the calculation of the free modes were done...

With the continuous development of aeronautical an space technologies, greater demands are being placed on the aviation and aerospace engine performance. The machining accuracy of fuel injection micro hole has great influence on engine performance. The machining accuracy of micro hole is closely related...

Construction and lifting technology of column subsection is the key to build the lower hull of tension leg platform (TLP). Reasonable block dividing and build process could reduce the fabrication of dock workload, control welding distortion and dimensional accuracy and shorten the construction period....

This research focuses on braking pad back plate of disc brake system. Firstly building original 3D model of brake pad and the prototype is manufactured , then 3D model is imported into ANSYS for modal simulation and noise bench test with prototype is conducted. To verify the validity and precision of...

As time enters 21st century, the world enters the era of oil scarcity, which is the so-called "post-oil era." Onshore exploration peak period has expired; the energy gap gradually expanded into the marine transfer is the trend. The main forms of offshore platforms are: jacket platforms, jack-up rigs,...

This paper conducts correctly the mechanical analysis of joints by clinching for various values of module and process parameter. The force of tensile and shearing of the joint by clinching in AL5052 sheets were analyzed; the theoretical calculation formulas of the shearing and tensile force were deduced...

The monitoring and control system of tower crane is an embedded system which is based on the CRIO module and LabVIEW platform. It can monitor the work condition parameters and control the executing elements of tower crane. The embedded system configures CAN bus driver module and CAN node field detection...

Deep water gravity jacket is a type of offshore steel structure developed in 1970s. Design depth of the type jacket is in 200m and 100~150m water depth is better. Now some foreign countries have the fabrication experience of the type jacket, however there is none fabrication experience in China. This...

The noise control issue on construction machinery has received increasing attention in recent years. Prior to work out feasible noise control strategies, it is necessary to find out the primary noises. In this paper, main frequencies of potential noise sources was analyzed and calculated. Sound pressure...

To get the optimal productivity, the speed change law is studied for the 400 horsepower wheeled tractor equipped with hydro-mechanical continuosly variable transmission (HMCVT). The tractive power are proposed as the evaluation indexes of the producitvity of the tractor. Based on the load resistance...

In this paper, a propeller model which is common used in small multirotor aerial vehicles is created in CATIA software. To analysis the aerodynamic performance of the propeller in wind field, numerical simulation method in fluent software is used. Through the building of computational domain, meshing...

Automobile assembly workshop has complex process; it usually requires the use of special spreader. Due to highly intensive work, the security requirements of the job are always in high demand, so safety and reliability of the spreader is essential. In this paper, finite element analysis and NDT were...

During the 6-DOF (6 degrees of freedom) industrial robot processing continuous short segments, frequent start-stop motions would cause vibration of joint and low playback efficiency. For the purpose of improving machining precision and playback efficiency, a cubic S-curve ACC/DEC (acceleration and deceleration)...

The center cable drill rod for coal mine can transmit electric power signals from hole top to bottom while establishing a two-way high-speed information channel between devices at hole top and bottom. This paper introduces the design of outer pipe and inner structure of the cable drill rod and researches...

Collaborative control of the autonomous platoon poses significant theoretical and technical challenges. The processes of the platoon collaborative control need to deal with the discrete strategies switching and handle the continuous dynamic behavior of the vehicles. While, the platoon control system...

With the Arduino microcontroller the battlefield EOD robot is composed of double body connecting with double joints, and all of the wheels composed of double track and vice round to carry and to facilitate its adapt to a variety of complex topography on the battlefield. Double joints can be very good...

Under the Solidworks design environment, the modeling of folding chair based on the omnidirectional mobile rescue platform has been finished. This integral structure design can achieve two functions of transshipment goods and manned patrol, and the electromagnetic clutch is used to control the chair...

Since the transmission efficiency and the transmission power of the existing resonant wireless power transmission (WPT) system with a single transmitter were lower, a compact resonant WPT system with dual transmitters was studied. There was a close coupling relationship between the dual transmitters...