scholarly journals STABILITY ANALYSIS OF FOUR TYPES OF POLE AND LINER

2010 ◽  
Vol 2 (2) ◽  
Author(s):  
St. Aisyah Farhum
Keyword(s):  
Stability Analysis ◽  
International Maritime Organization ◽  
Minimum Standard ◽  
Flat Bottom ◽  
Fishing Boat ◽  
Standard Value ◽  
Standard Values ◽  
The Stability ◽  
Stability Results ◽  
Better Than

<p>This study was purposed to compare the stability of four types of pole and liner casco (round bottom, round flat bottom, round sharp bottom and u-v bottom),. The stability value was analyzed by calculating the stability on the curve with the heeling angle of 0-90°. The stability results of each casco type were then compared with the criteria of minimum standard value derived from IMO (International Maritime Organization). Results showed that the four casco types had greater stability values than IMO standard values. This study found that the stability value of the round –sharp bottom casco was better than the others.</p><p>Keywords: Stability of fishing boat, Pole and liner, casco</p>

scholarly journals STABILITY ANALYSIS OF FOUR TYPES OF POLE AND LINER

2010 ◽  
Vol 2 (2) ◽  
Author(s):  
St. Aisyah Farhum
Keyword(s):  
Stability Analysis ◽  
International Maritime Organization ◽  
Minimum Standard ◽  
Flat Bottom ◽  
Fishing Boat ◽  
Standard Value ◽  
Standard Values ◽  
The Stability ◽  
Stability Results ◽  
Better Than

This study was purposed to compare the stability of four types of pole and liner casco (round bottom, round flat bottom, round sharp bottom and u-v bottom),. The stability value was analyzed by calculating the stability on the curve with the heeling angle of 0-90°. The stability results of each casco type were then compared with the criteria of minimum standard value derived from IMO (International Maritime Organization). Results showed that the four casco types had greater stability values than IMO standard values. This study found that the stability value of the round –sharp bottom casco was better than the others.Keywords: Stability of fishing boat, Pole and liner, casco

scholarly journals A General Numerical Method for Analyzing the Linear Stability of Stratified Parallel Shear Flows

2014 ◽  
Vol 31 (12) ◽  
pp. 2795-2808 ◽  
Author(s):  
Tim Rees ◽  
Adam Monahan
Keyword(s):  
Stability Analysis ◽  
Numerical Method ◽  
Shear Flows ◽  
Numerical Solutions ◽  
Analytical Approximations ◽  
Onset Of Turbulence ◽  
Parallel Shear Flows ◽  
Critical Layers ◽  
The Stability ◽  
Stability Results

Abstract The stability analysis of stratified parallel shear flows is fundamental to investigations of the onset of turbulence in atmospheric and oceanic datasets. The stability analysis is performed by considering the behavior of small-amplitude waves, which is governed by the Taylor–Goldstein (TG) equation. The TG equation is a singular second-order eigenvalue problem, whose solutions, for all but the simplest background stratification and shear profiles, must be computed numerically. Accurate numerical solutions require that particular care be taken in the vicinity of critical layers resulting from the singular nature of the equation. Here a numerical method is presented for finding unstable modes of the TG equation, which calculates eigenvalues by combining numerical solutions with analytical approximations across critical layers. The accuracy of this method is assessed by comparison to the small number of stratification and shear profiles for which analytical solutions exist. New stability results from perturbations to some of these profiles are also obtained.

The Stability Analysis on the Different Types of Single Layer Latticed Shell

2013 ◽  
Vol 788 ◽  
pp. 598-601
Author(s):  
Jun Qiang Wu ◽  
Yu Cui
Keyword(s):  
Stability Analysis ◽  
Static Load ◽  
Single Layer ◽  
Static Stability ◽  
Different Types ◽  
Practical Engineering ◽  
Small Structure ◽  
The Stability ◽  
Lattice Shell ◽  
Better Than

This single-layer spherical reticulated shell has the advantages of reasonable stress,beautiful appearance ,fast construction,is widely applied in practical engineering. Through the static stability analysis of three kinds of single-layer spherical lattice shell structure using ansys, we get them in the uniform deformation under static load, the modal, buckling load. The results show that: The Kiewitt latticed shells displacement is small, structure is stable, better than SchwedLer and lianfang.

STABILITY ANALYSIS OF A DISCRETE NONLINEAR DELAY SURVIVAL RED BLOOD CELLS MODEL

2012 ◽  
Vol 05 (04) ◽  
pp. 1250030
Author(s):  
SHUFANG MA ◽  
YUANGANG ZU
Keyword(s):  
Dynamical System ◽  
Stability Analysis ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Discrete Dynamical System ◽  
Original System ◽  
Discrete Delay ◽  
The Stability ◽  
Stability Results ◽  
Nonlinear Delay

In this article we consider the kth-order discrete delay survival red blood cells model. The general form of the discrete dynamical system is rewritten as xn+1 = f(Pn, δn, xn, …, xn+1) where Pn, δn converge to the parametric values P and δ. We show that when the parameters are replaced by sequences, the stability results of the original system still hold.

scholarly journals Studi Pemanfaatan Limbah Beton Mutu Tinggi pada Campuran Asphalt Concrete Binder Course (AC-BC)

CANTILEVER ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 7-14
Author(s):  
Ika Sulianti
Keyword(s):  
Asphalt Concrete ◽  
Test Method ◽  
High Quality ◽  
Marshall Test ◽  
Standard Value ◽  
Standard Values ◽  
Asphalt Content ◽  
Value Flow ◽  
The Stability

The purpose of this research is to find out whether the modification of asphalt used with high quality of concrete waste as coarse substitute aggregate of Asphalt Concrete - Binder Course (AC – BC). In this study, the researcher used high quality of concrete waste fc’ 42, fc’ 47, fc’ 50, each waste concrete quality will be mixed with asphalt bitumen contents 5%, 5.5 %, 6 %, 6.5, and 7%. This research used the Marshall test method to determine stability value, flow value, Void In Mix (VIM), Void In Mineral Aggregate (VMA), Void Filled With Asphalt (VFA). AC - BC with high quality of concrete waste fc'42 obtained for the best bitumen content obtained is 7%, with a stability value of 1491.705 kg, flow 4.264 mm, MQ 343.465, VIM 9.190%, VFA 34.425%, VMA 15.067%. AC - BC with high quality of concrete waste fc'47 was obtained for the best asphalt content obtained was 7%, with stability values ​​1551.715 kg / mm, flow 4.587 mm, MQ 339.122, VIM 5.530%, VFA 63.308%, VMA 14.235%.The best results of the Marshall test were obtained at the high quality of concrete waste fc'50, asphalt content obtained is 7%, with the stability of 1616.145 kg, flow 4.859 mm, MQ 333.720, VIM 5.116%, VFA 55.597%, VMA 13.226%. Referring to the obtained research test, the values of stability match with Bina Marga standard value, namely 800 kg, but VFA value, VIM, and flow are not of Bina Marga standard values. In addition, VMA vales fulfilling Bina Marga standard values are concrete waste fc’42 and fc’47 with the scale 14%. The researcher hopes that this research will be the guideline in making a mixture of asphalt concrete binder courses with the replacement of coarse aggregate using concrete waste and to inspire people in utilizing concrete waste in technical aspects.

scholarly journals Stability analysis of finite difference schemes for an advection diffusion equation

2017 ◽  
Vol 29 (2) ◽  
pp. 143-151 ◽  
Author(s):  
TMAK Azad ◽  
LS Andallah
Keyword(s):  
Stability Analysis ◽  
Finite Difference ◽  
Diffusion Equation ◽  
Difference Schemes ◽  
Finite Difference Schemes ◽  
Time Step ◽  
Advection Diffusion Equation ◽  
Advection Diffusion ◽  
The Stability ◽  
Stability Results

The paper studies stability analysis for two standard finite difference schemes FTBSCS (forward time backward space and centered space) and FTCS (forward time and centered space). One-dimensional advection diffusion equation is solved by using the schemes with appropriate initial and boundary conditions. Numerical experiments are performed to verify the stability results obtained in this study. It is found that FTCS scheme gives better point-wise solutions than FTBSCS in terms of time step selection.Bangladesh J. Sci. Res. 29(2): 143-151, December-2016

Stability of Gyroscopic Circulatory Systems

2018 ◽  
Vol 86 (2) ◽  
Author(s):  
Firdaus E. Udwadia
Keyword(s):  
Stability Analysis ◽  
Large Scale ◽  
Real Life ◽  
Central Result ◽  
The Stability ◽  
Gyroscopic Systems ◽  
Stability Results

This paper presents results related to the stability of gyroscopic systems in the presence of circulatory forces. It is shown that when the potential, gyroscopic, and circulatory matrices commute, the system is unstable. This central result is shown to be a generalization of that obtained by Lakhadanov, which was restricted to potential systems all of whose frequencies of vibration are identical. The generalization is useful in stability analysis of large scale multidegree-of-freedom real life systems, which rarely have all their frequencies identical, thereby expanding the compass of applicability of stability results for such systems. Comparisons with results in the literature on the stability of such systems are made, and the weakness of results that deal with only general statements about stability is exposed. It is shown that the commutation conditions given herein provide definitive stability results in situations where the well-known Bottema–Karapetyan–Lakhadanov result is inapplicable.

Control of 2D Minimally Persistent Formations with the Fault Tolerance of Three Co-Leaders in Cycle

2014 ◽  
Vol 950 ◽  
pp. 245-252
Author(s):  
Hu Cao ◽  
Qiang Qu ◽  
Xiao Kun Ying ◽  
Yang Liu ◽  
Zhen Su ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Fault Tolerance ◽  
Group Formation ◽  
Kinematic Model ◽  
Control Law ◽  
Rigidity Matrix ◽  
First Order ◽  
The Stability ◽  
Better Than

This paper mainly addresses a novel control law with rigidity matrix based on three co-leaders minimally persistent formations in the plane. This control law particularly considers the fault tolerance of the leaders, and in this way, the three co-leaders model is better than leader-first follower model, leader-remote follower model, etc. in persistent formation. Firstly, the first order kinematic model is adopted for every agent. Then the fundamental moving principal of the leaders and the followers are described in detail. On the basis of these principals, the control law with the rigidity matrix for the whole formation is proposed. Moreover, the stability analysis is also supplied. Finally, simulations show that the proposed controllers ensure the group formation stabilized to maintain the rigid shape, while the distances between the agents remain unchanged.

A collocation technique based on modified form of trigonometric cubic B-spline basis functions for Fisher’s reaction-diffusion equation

2018 ◽  
Vol 14 (5) ◽  
pp. 923-939 ◽  
Author(s):  
Neeraj Dhiman ◽  
Mohammad Tamsir
Keyword(s):  
Stability Analysis ◽  
Numerical Methods ◽  
Collocation Method ◽  
Taylor Series ◽  
Taylor Series Expansion ◽  
Content Type ◽  
B Spline ◽  
Nonlinear Part ◽  
The Stability ◽  
Better Than

Purpose The purpose of this paper is to present a modified form of trigonometric cubic B-spline (TCB) collocation method to solve nonlinear Fisher’s type equations. Taylor series expansion is used to linearize the nonlinear part of the problem. Five examples are taken for analysis. The obtained results are better than those obtained by some numerical methods as well as exact solutions. It is noted that the modified form of TCB collocation method is an economical and efficient technique to approximate the solution PDEs. The authors also carried out the stability analysis which proves that the method is unconditionally stable. Design/methodology/approach The authors present a modified form of TCB collocation method to solve nonlinear Fisher’s type equations. Taylor series expansion is used to linearize the nonlinear part of the problem. The authors also carried out the stability analysis. Findings The authors found that the proposed method results are better than those obtained by some numerical methods as well as exact solutions. It is noted that the modified form of TCB collocation method is an economical and efficient technique to approximate the solution PDEs. Originality/value The authors propose a new method, namely, modified form of TCB collocation method. In the authors’ best knowledge, aforesaid method is not proposed by any other author. The authors used this method to solve nonlinear Fisher’s type equations and obtained more accurate results than the results obtained by other methods.

scholarly journals Stability analysis of fractional differential equations with unknown parameters

2019 ◽  
Vol 24 (2) ◽  
pp. 224-240 ◽  
Author(s):  
Mehmet Emir Koksal
Keyword(s):  
Stability Analysis ◽  
Differential Equations ◽  
Fractional Differential Equations ◽  
Decomposition Method ◽  
Stability Region ◽  
Parametric Stability ◽  
Unknown Parameters ◽  
Fractional Differential ◽  
The Stability ◽  
Stability Results

In this paper, the stability of fractional differential equations (FDEs) with unknown parameters is studied. Using the graphical based D-decomposition method, the parametric stability analysis of FDEs is investigated without complicated mathematical analysis. To achieve this, stability boundaries are obtained firstly by a conformal mapping from s-plane to parameter space composed by unknown parameters of FDEs, and then the stability region set depending on the unknown parameters is found. The applicability of the presented method is shown considering some benchmark equations, which are often used to verify the results of a new method. Simulation examples show that the method is simple and give reliable stability results.

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