Advanced Materials Research Vol. 904

Abstract: 2D whole field finite element method (FEM) based on ANSOFT software was adapted, and the magnetic field distribution of permanent-magnet brushless DC motor (BLDC) were calculated. The above discussion can provide reliable theory foundation for the reasonable establishment of nonlinear model BLDC and the further exploitation and application.

Abstract: Based on the continuum damage mechanics theory, according to the development of the fatigue damage evolution equation, and combining the interaction coefficient of stiffener and plate, with plastic strain as the control quantity of damage evolution, the stiffened plate low cycle fatigue damage mechanics model is established, and the calculation method of the fatigue crack initiation life is obtained. This method for the initiation life of fatigue crack is divided into the life before the damage and the life of the damage evolution. The model results are compared with those of the finite element results. Conclusions show that the model can reflect the regularity of axial plastic strain evolution of stiffened plate, and can be directly used for fatigue loads analysis under the mechanism of initiation life.

Abstract: In this paper, in view of the non-condensable gas in the process condensate can not effectively remove in industrial boiler, designed has developed a new type of high efficient deaerator. Three times the gas-liquid separation process can ensure the effective clutter the impurity gas discharge in this deaerator. When the condensation temperature is below 80 °C, standby mouth additional blower can be further improved degassing efficiency. The body of tank is designed by the liquid levels frequency conversion control and the upper tank provided with an overflow pipeline, to ensure the separation of the impurity gas, but also guarantee the safe operation of the system.

Abstract: To optimize the operation parameters, the comparative analysis was used by means of the finite element analysis software ALGOR．In addition, equivalent specific heat and equivalent thermal conductivity were used during frozen. The conclusions were as follows: First of all, the higher velocity was, the bigger convective heat transfer coefficient will be ;What′s more, the convective heat transfer coefficient of the salt solution was 2 times bigger than the glycol solution；Last but the most important thing was that it was the best effect heat transfer that not only the medium was salt solution, but also the velocity was 0.57m/s. The result of experiment was consistent with the results of the simulations after field test.

Abstract: Based on the background of Dalian Bay Cross-Sea Bridge project, some plans with settings of lead-rubber bearing among side pier, tower and stiffening girder have been analyzed under vertical seismic input using the favorable shearing property of laminated rubber, damping characteristics of lead and reasonable parameters (yield force and stiffness). Analysis results show that the displacement of controlling node and force of controlling section have been reduced.

Abstract: Based on the time-varying suspen-domes model, a configuration-cable force dual control form-finding algorithm was proposed, taking the construction process and construction technology into consideration, according to the looped cable tensioning construction technique, especially in the practical project. The form-finding algorithm was complemented by inverse iteration method for controlling the structure configuration and the initial stress increment method for controlling the cable force. Furthermore, the influence of geometric nonlinearity, construction process, and other construction technology could be taken into consideration.