The air-flow field in melt blowing plays a key role in fiber drawing and nonwoven web performance. A multiobjective optimization using genetic algorithms was proposed to obtain optimum air-flow field with the lowest velocity decay and temperature decay of the air-flow field of a melt-blowing slot die. Four main geometry parameters, including slot width, head width, slot angle, and setback, were studied. The optimal results were achieved in the 50th generation with 20 individuals of each generation. The results also show that a smaller slot angle and larger slot width resulted in a lower air velocity decay and temperature decay.

Abstract. In this paper, finite element software ANSYS Workbench is used in the static structural analysis of a kind of 2MW wind turbine blade. The results show that under the maximum possible load, the finite element model of the blade is within the safe range. But relatively speaking, the beam and the trailing edge are relatively bearing larger stress and more dangerous.