期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2019
卷号：10
期号：1
页码：1-16
出版社：International Energy and Environment Foundation (IEEF)
摘要：This paper investigates the effect of the depth and location of the crack on the heat generated in the beam,
due to different variable load time with frequency values, in case of periodic load. The beam used made of
carbon steel (1.5% C) which has main specifications of density (7750 kg/m3) and modulus of elasticity
200 Gpa. Two techniques are used, first, Theoretical technique is used in both analytical and numerical
analysis. The analytical technique using the derived equation of motion for the beam and the crack model
is included. Matlab (R 2017), computer program has been used to solve the derived equations to predict
the amount of heat generated, and second, the numerical technique is employed using the finite element
method adopting COMSOL program to verify the analytical results, it also gives a perception of the
difference in temperature due to heat generated. In the first time, the heat generated was calculated as a
result of force vibration at different locations and boundary conditions of the beam. It was observed that
the heat generated as the frequency supplied is approaching to the natural frequency, and the generated
heat is reduced as the frequency supplied goes away the natural frequency significantly. It has been
observed that the effect of the crack for different types of supported beams affects the heat generation
where the greater depth of the crack has increased the heat generation of the beam is increasing, as well
as, the approaching the position of the crack than the moment higher of the beam, the heat generation of
the beam is increased. In addition, analytical the results evaluated were comparison by numerical results
evaluated by using COMSOL program, and found that the maximum percentage error is about (6.2%).
