In conjunction with a project of the Transport Department of Hunan province, a series of experimental and analytical research on the long-span PC bridges with thin-walled box girder, including the thermal field in box girder, the thermal effects, the shrinkage and creep effects of Box Girder Bridge, and the prestress losses, have been performed in this dissertation.
By simulating and modeling the temperature field and thermal deformation of the ball-screw under periodically varying heat sources, this paper describes the thermal dynamic characteristics of the ball-screw under such conditions.
Firstly, the distributions of welding temperature field and residual stress on a butt joint were numerically simulated with the sequentially coupled method.
Research on key technologies of FEM simulation of temperature field in the process of quenching
In this paper, some key technologies of computing the quenching temperature field are given.
This method can be used to compute the time-step according to maximum and minimum difference values of the temperature field between the previous simulating step and the current simulating step.
The temperature fields were measured by high temperature thermocouples, and NOx distributions were obtained by using gas detection instruments.
First and foremost, such models encounter the greatest difficulties in description of aerosols and clouds, which in turn essentially influence temperature fields, the atmosphere circulation, and transport of water in the atmosphere.
Averaged temperature fields in asymmetrical turbulent streams over localized heat sources
The equations for the single-point moments of second order of the velocity and temperature fields closed by means of semiempirical hypotheses are used to investigate the critical flow regime in a stratified medium.
Development of the temperature fields in an electric arc struck on a point electrode in a homogeneous gas stream
The temperature distribution for the ball-screw at different times and directions is shown.
In this paper, temperature distribution inside a KTP crystal was analyzed by solving the thermal conductivity equation.
According to the temperature distribution of the KTP, we have theoretically calculated the optimal phase matching angles, tolerance angles and walk-off angles of type II KTP crystal as a function of temperature.
Some relations governing temperature distribution of gas in a vortex tube
To evaluate the coverage of the reservoir by the thermal effect, we must know the temperature distribution in the multi-well reservoir system at any instant of time.
The steady thermal field associated with the flow of gassy oil through a porous medium is investigated with allowance for the Joule-Thomson and degassing effects.
The value ofTT depends on the configuration of the thermal field between the electrodes and the type of gas.
The possibility of developing an analyzer for hydrocarbon traces in air is considered based on experimental data on the conditions of substance oxidation in a thermal field using an ozone-containing gas.
The study of the Earth's thermal field testifies to the presence of a huge, practically inexhaustible and ecologically pure source of thermal energy in the interior.
The mass transfer in a cylindrical inclusion of the melt with a rectangular cross-section in an anisotropic crystal in a nonstationary thermal field has been analyzed with due regard for the nonlinear solid-liquid interfacial kinetics.