Questions tagged [engineering]
The engineering tag has no usage guidance.
32
questions
3
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3
answers
263
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Graphic manipulation - Psychrometric chart
I'm working on a psychrometric chart on Mathematica. The code is as follows:
...
2
votes
2
answers
374
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Finding Temperature as function of pressure and entropy in Mathematica
While Mathematica's ThermodynamicData[] is very useful, is there a method in Mathematica to find Temperature as a function of Pressure and Entropy? ...
- 111
1
vote
2
answers
293
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Euler-Bernoulli cantilever beam with variable flexural rigidty
I am trying to find the deflection of cantilever beam with variable flexural rigidity (i.e. EI(x) instead of constant EI) starting from this equation: $EI(x)\frac{\partial^2y}{\partial x^2} = M(x)$, ...
- 23
5
votes
2
answers
2k
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Smooth Boxcar function (Rectangle Pulse function)
There are some answers on how to get a smooth squarewave function. But I would like to have a smooth boxcar function or rectangle function with 2 different widths.: ...
- 1,751
3
votes
2
answers
294
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Longitudinal Bar Vibration: Prescribed BC's at end not working
I am working on a vertical 1D bar vibration problem using the wave equation (ie: oil industry sucker rod application). On one end of the bar I have prescribed displacement and force boundary ...
- 55
0
votes
1
answer
170
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1D Wave Equation: Vertical Rod and Displacement vs. Textbook Solution
I am trying to setup Mathematica to analyze a vertical round rod under its own weight, fixed on one end free on the other. I have the 1D wave equation and a distributed load to represent the self ...
- 55
0
votes
1
answer
68
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Closed-Loop Systems and System Response Modeling [closed]
I'm testing out code from a textbook for possible bugs. This chapter demonstrates a plot of a motor's angular position response in accordance to it's transfer function model:
...
- 105
4
votes
1
answer
2k
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Using Mathematica for solving circuit problems
This is a broad question, I need general help regarding this. I have to solve some electric circuits using Mathematica, software I've never used before. So, my question is, where to start? I believe ...
- 53
4
votes
1
answer
166
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Project and notebook design
I have been using Mathematica now for a little over a year...this started off in maybe a modern 'classic' way of having to solve symbolic mathematics and related plus the want to learn a CAS (and more)...
- 2,921
1
vote
1
answer
232
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Centroid of a cosine shaped rod
There's a problem in Hibbeler's 14th edition of Statics for Engineering that I've tried a few times and couldn't solve. The problem is shown below. It wants me to find the centroid coordinates of a ...
- 11
0
votes
2
answers
168
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Get the 2d plot of the intersection of 3d surfaces
I am trying to find points $(x,y)$ which satisfy the following constraint:
$$1000F_r(x,y)=\frac{1000x\sqrt{1/y^2-1/A^2}}{1+x\sqrt{1/y^2-1/A^2}}=1/2$$
Where $A\simeq0.0008$. My idea was to plot $z=...
- 309
0
votes
1
answer
431
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Translating the Newton-Raphson method from Matlab to Mathematica
I am trying to optimize the variables of two (or three depending on how you think about it) matrices using the Newton-Raphson Method. I made the bottom code in Matlab. The code is pretty simple it ...
- 87
2
votes
1
answer
835
views
ThermodynamicData Wrong Air Enthalpy
I'm using ThermodynamicData to do some calculation. By I found that there is a problem in the enthalpy of air.
Input:
...
- 115
0
votes
1
answer
131
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Get temperature given pressure and enthalpy
ThermodynamicData["Ammonia", "Enthalpy", {"Temperature" -> t,"Pressure" -> p}]
works fine, but how can I get temperature when pressure and enthalpy are ...
- 3
2
votes
2
answers
120
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Solving drilling positions using Solve or Trigonometry
I'm working on a profile where I need to position defined points: $ x1 $, $ x2 $, and $ x3 $
With the code below I get these values using Approximate Functions Fit....
- 9,145
4
votes
1
answer
613
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Solving coupled Differential equations with matching condition
I am somewhat new to using Mathematica and was wondering if it can solve the following: $(a \rightarrow h)$ are constants
$a w^4[x] =-b + c(d-w[x]-e x),\hspace{2em} x_1 \leq x \leq x_g \\
a w^4[x] ...
- 41
3
votes
1
answer
107
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Controlling the motion of points in an animation
I am looking for a better way to show this behavior on a pressure-composition diagram for immiscible liquids (two black dots show behavior at different x-positions, only one is present otherwise):
...
- 777
3
votes
1
answer
1k
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Euler-Bernoulli cantilever beam with parabolic load
How do I get the displacement in the free end of a bar with Parabolic load (I.e. in point with length L)?
I found the information on a site, but only I found for uniform load.
Someone who ...
- 9,145
-1
votes
1
answer
195
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How can I solve a certain statics problem [closed]
Does someone have any idea how to solve it or from where to start?
- 11
3
votes
1
answer
124
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Trouble with some optimization
I am attempting to use Mathematica to solve an optimization problem related to mechanism design (4-bar). The optimization problem is basically the following:
1) Solve these two simultaneous loop ...
- 73
16
votes
2
answers
1k
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Heat convection differential equations from 1952 - Mathematica "fails to converge"
I am trying to solve a fundamental problem in analytical convective heat transfer: laminar free convection flow and heat transfer from a flat plate parallel to the direction of the generating body ...
- 5,321
0
votes
2
answers
67
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How to implement Y-Δ conversion?
There seems no built-in support for Y-Δ conversion (electrical engineering).
Any idea on how to implement this function?
- 567
14
votes
3
answers
1k
views
Time evolution/dynamics of circular plate with hole (Biharmonic equation and stiffness)
On this Mathematica.SE form, there exists information on how to use Mathematica to demonstrate the vibration of a circular membrane and the deflection of an orifice plate (the latter I had raised ...
- 5,321
8
votes
1
answer
1k
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Tracing the line of motion of a point in graphics
I'm a beginner in mathematica. I'm making a nb that calculates the output angle of a fourbar mechanism based on the input angle. So the input is the length of the four linkages and the input angle of ...
- 307
9
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3
answers
1k
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FEM Solution desired for "Plate with orifice" deflection: Application of Boundary Conditions and use of Regions
I found the deflection of an orifice plate (circular plate with a hole) subject to uniform pressure using Mathematica's NDSolve functionality. The plate is fixed at its outer circumference and is ...
- 5,321
3
votes
1
answer
143
views
Fourier cosine series of displacement
I'm trying to calculate a Fourier Cosine Series of displacement for general 4-bar mechanism. My code not working. I don't understand why. I need the result as this form
...
- 31
2
votes
1
answer
361
views
Max taking too much time. (Pattern loading/frame analysis)
I'm creating a structural engineering program. It's a frame analysis program that computes the shear and moment diagrams. The frame is subjected to 2 kinds of distributed loads(only the beams(...
- 381
9
votes
1
answer
486
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Solving 2-D Mechanical Systems
I'm trying to use Mathematica to solve a particular 2-d mechanical system. The system comes from "DESIGN AND OPTIMIZATION OF AN EIGHT-BAR LEGGED WALKING MECHANISM IMITATING A KINETIC SCULPTURE, “WIND ...
- 379
10
votes
1
answer
1k
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Realistic jet engine flame
I’m trying to make rocket flame and jet engine fire that is a Graphics3D object so that it can be used with a 3D rocket project.
There are many types of such ...
- 101
6
votes
1
answer
532
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Book about using Mathematica in real world engineering projects
So far I've abused Mathematica by only using it as a notebook. That's a big waste since I've bought a student-life time Mathematica 9 / SystemModeler license. My problem is that I'm not inspired to ...
- 63
7
votes
1
answer
1k
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Simulating a quick return mechanism
Last time, I got a satisfying answer for simulating a toggle mechanism, just as expected. NDSolve is great. I tried playing with it (as a matter of fact, @MichaelE2 ...
20
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3
answers
2k
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How can I simulate this toggle mechanism?
I've been introduced to Mathematica very recently. Basically, I haven't actually "solved" anything in my Mathematica lifetime, but I've done some simulations. With my fractional knowledge, I tried ...