Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userThe Effect of the Pressure Decay Factor on the Response Spectrum of the Explosion Load
تأثير عامل تخامد الضغط على طيف الاستجابة لحمولة الانفجار
974
1 17
0
(
0
)
Authors
حنان حسين( باحث )
Created by
Shamra Editor
Ask ChatGPT about the research
في هذا البحث تم التطرق إلى التابع الأسي لحمولة الانفجار, و تعريف عامل تخامد الضغط في هذا التابع (a). بعد ذلك تمت دراسة أربعة توابع لحمولة الانفجار بأربع قيم مختلفة لعامل تخامد الضغط, و ذلك من أجل جملة ذات درجة حرية واحدة غير مخمدة, حيث تم وضع معادلة الحركة و حلها. و باستخدام برنامج MATLAB, و من أجل كل تابع رسمت العلاقة بين ((Yst/Y(t) و بين t/T. و من ثم رسمت أطياف الاستجابة لهذه التوابع, و تمت مقارنة الأطياف الخاصة بالتوابع الثلاث الأخيرة بالطيف الخاص بالتابع الأول و الذي يمثل الشكل المثلثي لحمولة الانفجار. و خلص البحث إلى أنه من أجل مجال معين ﻠa يمكن و بتقريب مقبول استخدام طيف الاستجابة الخاص بالحمولة المثلثية, لكن بعد ذلك المجال يفضل استخدام أطياف الاستجابة للحمولة الأسية.
This research discusses the exponential function of the explosion load and the pressure decay factor in this function (a). After that, four functions with four different values of the pressure decay factor are studied, and that is for the un-damped SDOF system, where the equation of motion is formed and solved. Then, using MATLAB software for every function, the relationship between (Yst/Y(t)) and t/T is plotted, and that enables plotting the response spectrum for each one. Moreover, a comparison between the spectra of the last three functions with the first one that describes the triangular explosion load is drawn. This research has concluded that for a certain range of (a), it is possible, and with acceptable approximation, to use the spectra of triangular load, but beyond that it is better to use the spectra of exponential load.
References used
Bangash, M.Y.H., Bangash, T. Explosion- Resistant Buildings. Springer- Verlag, Berlin Heidelberg, 2006, 805
Biggs, J. M. Introduction to Structural Dynamics, McGraw Hill, New York, 1964,341
Bulson, P.S. EXPLOSIVE LOADING OF ENGINEERIN STRUCTUERS. E & FN Spon, London, 1997,236
We, J., Quintero, R., Galati, N., Nanni, A. Failure Modeling of Bridge Components Subjected to Blast Loading. International Journal of Concrete Structures and Materials, Vol.1, No.1, December 2007, 19-28
Henrych, J. The dynamics of explosion and its use. Elsevier, Amsterdam, 1979,558
rate research
Read More
Corrosion is the most important problem in the process of oil production, Its results are: sudden fracture, high economic cost and great loss in oil equipment. Appropriate solutions have been suggested to extend the life of facilities, and to avoid c
orrosion phenomenon which may get the facility out of service, But, finding the main
reasons causing this phenomenon, and studying the factors that contribute to increase or reduce the spread of corrosion requires more urgent attention.
In this paper, the data of the pressure has been analyzed in three crude oil pipelines and focus was on the values during the days where changes were irregular. In the same period, the study of internal corrosion rate was being done, using weight loss method. It has been noticed that when the value of pressure is greater than 2 Mpa, the
internal corrosion rate will be above the maximum. allowable limit which is 4 mil per year (MPY), while the internal corrosion rate will be within the acceptable range when the pressure is not greater than 1 Mpa.
In this work we have studied the effect of exchange interactions between the gluons of
order on the pressure and phase diagram of quark – gluon plasma, where we
have studied both of them as function of temperature and chemical potential, and we
as
sumed that, the plasma composed of just two massless quarks (the up and down quark)
which exchange interaction.
The bag model has been used, where the bag B and coupling constants were assumed to
be independent of temperature and chemical potential. We have found that the gluons
interactions of order had a negative effect on the pressure of the plasma, which cause
the quarks to stay in the confined phase, and then increases the critical temperature where
the hadrons dissolve to quarks and gluons. We have showed that, the results depend
strongly on the values of both the coupling and bag constants which had been used.
Serum response factor (SRF) is a protein that regulates the transcription of
several other genes. It regulates especially cardiovascular system
developmental regulatory genes.
This study which was based on the immunohistochemistry showed that
SRF
influence the brain and limb vasculature development in the mice embryo.
This paper presents an experimental investigation of the flow pattern and wall pressure due to the change of the opening discharge diameter in cylindrical silos. The experiments were performed on a
metal silo prototype using corn as a granular mater
ial. The silo prototype used in the study was built of a metallic cylinder, which can be opened longitudinally allowing the observation of the flow pattern
through a plexi-glass wall, and the wall pressure distribution was measured using a special granular pressure transducer. The present study revealed unexpected results to what might be expected through
current theoretical knowledge.
The aim of this paper is to present a recent experimental investigation of the wall pressure distribution observed during the emptying of a modeling silo, with and without, inserts, for three different
heights hi of the insert base above the hopper
outlet. The experiments were carried out with corn, at the concrete lab. in faculty of civil engineering in Damascus university in Syria. The results show that the upper-cone with downer-cone trunk insert had a strong influence on the pressures in the silo.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
