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In order to get more effective and accuracy results of condition evaluation for transformer, the FDS characteristics of oil-paper insulating systems are studied by using Finite Element Method (FEM) in this paper. Firstly, the FDS properties of oil-immersed paper (OIP) are measured in lab. Secondly, a model based on 110kV transformer's actual dimensions is proposed by FEM and XY model, respectively...
Established in this paper is a numerical simulation based design concept for engine valve train. This is realized by combining traditional design theory and advanced simulation technologies: i.e. the kinematics analysis, dynamics analysis, engine gas exchange process optimization, finite element analysis of the camshaft, fatigue analysis, as well as the simulation study of influences on engine's noise...
The controller of paralleling small single phase synchronous generators(SSPSG) should restrict the dash currents in generators below defined value when switch on. This article has built the field-circuit coupling time-stepping finite element model of the parallel system. The computation program is written in APDL languages of ANSYS and the transient process of paralleling two SSPSGs in various parallel...
A simplified model, which is composed of one tower and two spans of conductors, is given for overhead transmission line system. With tower regarded as cantilever beam and conductor as string, analytical calculation method of wind-induced vibration response of the mechanics system are studied based on the random vibration theory. A factor called dynamic load factor is introduced to the tower. Vibration...
A new U-type micro-actuator for precisely positioning a magnetic head in high-density hard disk drives was proposed and developed. The micro-actuator is composed of a U-type stainless steel substrate and two piezoelectric ceramic elements. Using a high-d/sub 31/ piezoelectric coefficient PMN-PZT ceramic plate and adopting reactive ion etching process fabricate the piezoelectric elements. Reliability...
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