Questions tagged [engineering]

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3 votes
3 answers
268 views

Graphic manipulation - Psychrometric chart

I'm working on a psychrometric chart on Mathematica. The code is as follows: ...
Julio Araujo Dos Santos's user avatar
2 votes
2 answers
397 views

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? ...
Chris B's user avatar
  • 111
1 vote
2 answers
301 views

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: $EI(x)\frac{\partial^2y}{\partial x^2} = M(x)$, ...
Masoud's user avatar
  • 23
5 votes
2 answers
2k views

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.: ...
Nam Nguyen's user avatar
  • 1,751
3 votes
2 answers
304 views

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 ...
wpilgri's user avatar
  • 55
0 votes
1 answer
176 views

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 ...
wpilgri's user avatar
  • 55
0 votes
1 answer
69 views

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: ...
TexMexDex's user avatar
  • 105
4 votes
1 answer
2k views

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 ...
Tony Reirdan's user avatar
4 votes
1 answer
174 views

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)...
DrMrstheMonarch's user avatar
1 vote
1 answer
245 views

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 ...
Felipe Beu's user avatar
0 votes
2 answers
174 views

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=...
tbfr416's user avatar
  • 309
0 votes
1 answer
435 views

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 ...
H. Alanzi's user avatar
2 votes
1 answer
976 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: ...
user155860's user avatar
0 votes
1 answer
131 views

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 ...
Szilan's user avatar
  • 3
2 votes
2 answers
120 views

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....
LCarvalho's user avatar
  • 9,233
4 votes
1 answer
618 views

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] ...
user38307's user avatar
3 votes
1 answer
108 views

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): ...
baumannr's user avatar
  • 787
3 votes
1 answer
1k views

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 ...
LCarvalho's user avatar
  • 9,233
-1 votes
1 answer
198 views

How can I solve a certain statics problem [closed]

Does someone have any idea how to solve it or from where to start?
smallbig's user avatar
3 votes
1 answer
125 views

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 ...
Ern's user avatar
  • 73
16 votes
2 answers
1k views

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 ...
dearN's user avatar
  • 5,341
0 votes
2 answers
67 views

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?
btwiuse's user avatar
  • 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 ...
dearN's user avatar
  • 5,341
8 votes
1 answer
1k views

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 ...
Mahmoud Mousa's user avatar
9 votes
3 answers
1k views

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 ...
dearN's user avatar
  • 5,341
3 votes
1 answer
145 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 ...
Brais's user avatar
  • 31
2 votes
1 answer
366 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(...
Mr. Pi's user avatar
  • 391
9 votes
1 answer
495 views

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 ...
mikea's user avatar
  • 379
10 votes
1 answer
1k views

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 ...
kmutiny's user avatar
  • 101
6 votes
1 answer
542 views

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 ...
Joeyy's user avatar
  • 63
7 votes
1 answer
1k views

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 ...
Waffle's Crazy Peanut's user avatar
20 votes
3 answers
2k views

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 ...
Waffle's Crazy Peanut's user avatar