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Solving a System of 2 ODES with Interval conditions (IVP)

£10-20 GBP

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Zveřejněno před více než 7 roky

£10-20 GBP

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1. The problem statement, all variables and given/known data I am trying to solve a system of 2 ordinary differential equations using matlab. However, I am not able to get numerical solutions from the code despite having keyed in all possible solutions. 2. Relevant equations The equations I am given are: dx/dt=A(x/t)+By dy/dt=C(x/t^2)+D(y/t) and the boundary conditions are: y(1)=0; y(1.2)=-100E6 3. The attempt at a solution My code so far: %Mechanical Properties of Material E=200e9; nu=0.3; P=100E6; %Constants A,B,C,D in the Equations a11= (1/E); a12= (-nu/E); a33= (1/E); A= (a12)/(a11+a12); B= ((a33)-((2*a12^2)/(a11+a12))); C= (a11)/(a11^2-a12^2); D= (2*a12+a11)/(a11+a12); %Defining the System of 2ODES syms x(t) y(t) eqns = [diff(x,t)==A*(x/t)+B*y, diff(y,t)==-C*(x/t^2)-D*y]; cond = [y(1) == 0, y(1.2)==-P]; withSimplifications = dsolve(eqns, cond) withoutSimplifications = dsolve(eqns, cond, 'IgnoreAnalyticConstraints', false) [xSol(t), ySol(t)] = dsolve(eqns) The answer is get is Warning: Explicit solution could not be found. > In dsolve (line 201) In IsotropicThickWallCylinder (line 18) xSol(t) = [ empty sym ] ySol(t) = [ empty sym ] Would really appreciate some help.
IČ projektu: 12240206

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8 nabídky
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Aktivní před 7 roky

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You are going totally wrong way: 1. You cannot categorize this problem as an IVP. 2. As the equations are not linear, hardly you get the solution following straightforward ways when using symbolic toolbox. I can use a function I previously coded for my book which I published in 2002, Numerical Recipes for Solving Engineering Problems. However there is another option to solve the problem using a function provided by MathWorks itself and included in your toolboxes.
£50 GBP v 2 dnech
4,8 (27 recenze)
5,0
5,0
8 freelanceři nabízejí v průměru £40 GBP za tuto práci
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Hi. I think I will be able to do this. Regards.......................................................
£30 GBP v 1 dni
4,9 (152 recenze)
6,3
6,3
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Hello, how are you? I hope you have a bright day/evening from your side. I have read the details provided, but please contact me so that we can discuss more on the project. I believe I have the required skills in this case. I will work on your requirements personally since I do not outsource to third parties, this guarantees you high-quality work that is delivered on time. You can also request for revisions till you’re fully satisfied with the work. I believe writing is a passion and not a money making business where people will deliver low-quality work just to get paid. Try my services, and you will never regret. Waiting for your kind response
£84 GBP v 3 dnech
4,8 (21 recenze)
4,8
4,8
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Knowledge Pro innovative is dedicated to brings to Industries, Small-Business and people like you a good service, we provide complete solution on Engineering, energy, circuit design, statistics, statistical analysis, renewable energy, autocad, matlab, mathematics, academic writings, technical writing etc. Our commitment lies in honesty, integrity, ethical code of conduct, efficiency and speedy respond, I love to work hard to meet the deadlines and take a project to the next level. Do not hesitate to contact me to discuss your project in details and determine how my skills will positively contribute to your team, let our service makes a positive and lasting impresion.
£11 GBP v 1 dni
5,0 (5 recenze)
3,7
3,7
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hello, So you want to solve a system of defirential equation, the unknowns are x and y that vary with respect to t. you given the value of y in t=1 an t=1.2 as if you have a boundary problem, my first question is what about the values of x at t=1 and t=1.2, , they are mandatory for resolving the system. the second remark is that you try to solve it analyticly, if you want to solve it numerically you have to use methode like finite difference, ode45, and the like. I have not yet understand the problem but these are my remarks.
£50 GBP v 2 dnech
4,8 (16 recenze)
3,9
3,9
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Hi, I've been working on matlab for several years and would like to work on your project. I'm looking forward to hearing from you.
£50 GBP v 1 dni
5,0 (4 recenze)
3,2
3,2
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Hello, I would like to work on this project as I am working on Matlab for my master thesis. Regards, Aakash
£23 GBP v 1 dni
0,0 (0 recenze)
0,0
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O klientovi

Pochází z UNITED KINGDOM
Cardiff, United Kingdom
5,0
4
Ověřená platební metoda
Členem od říj 30, 2016

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