Magnetomechanical Model for Hysteresis in Electrical Steel Sheet

Hysteresis in Cenozoic Antarctic ice-sheet variations

A coupled global climate–Antarctic ice sheet model is run for 10 million years across the Eocene–Oligocene boundary ~34 Ma. The model simulates a rapid transition from very little ice to a large continental ice sheet, forced by a gradual decline of atmospheric CO2 and higher-frequency orbital forcing. The structure of the transition is explained in terms of height mass balance feedback (HMBF) i...

A Homogenized Energy Model for the Direct Magnetomechanical Effect

This paper focuses on the development of a homogenized energy model which quantifies certain facets of the direct magnetomechanical effect. In the first step of the development, Gibbs energy analysis at the lattice level is combined with Boltzmann principles to quantify the local average magnetization as a function of input fields and stresses. A macroscopic magnetization model, which incorpora...

an application of equilibrium model for crude oil tanker ships insurance futures in iran

با توجه به تحریم های بین المملی علیه صنعت بیمه ایران امکان استفاده از بازارهای بین المملی بیمه ای برای نفتکش های ایرانی وجود ندارد. از طرفی از آنجایی که یکی از نوآوری های اخیر استفاده از بازارهای مالی به منظور ریسک های فاجعه آمیز می باشد. از اینرو در این پایان نامه سعی شده است با استفاده از این نوآوری ها با طراحی اوراق اختیارات راهی نو جهت بیمه گردن نفت کش های ایرانی ارائه نمود. از آنجایی که بر...

Low-frequency hysteresis model for nonoriented Fe-Si sheet using Preisach theory

In this work, a low-frequency dynamic hysteresis model is proposed and applied to nonoriented Fe-Si steel. The model based on Preisach theory can be used when skin effect is negligible over the lamination thickness. In our model, the Preisach engine that usually takes the magnetic field as input variable must be inverted. Some B(H) symmetric loops are calculated and compared with measurements i...

Magnetomechanical Damping and Domain Structures in Grain Oriented Silicon Steel Sheets