# Questions tagged [engineering]

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### Graphic manipulation - Psychrometric chart

I'm working on a psychrometric chart on Mathematica. The code is as follows: ...
374 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? ...
• 111
1 vote
293 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: $EI(x)\frac{\partial^2y}{\partial x^2} = M(x)$, ...
• 23
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.: ...
• 1,751
294 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 ...
• 55
170 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 ...
• 55
68 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: ...
• 105
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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 ...
166 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)...
• 2,921
1 vote
232 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 ...
168 views

107 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): ...
• 777
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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
195 views

### How can I solve a certain statics problem [closed]

Does someone have any idea how to solve it or from where to start?
• 11
124 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 ...
• 73
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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
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?
• 567
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
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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 ...
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 ...
• 5,321
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 ...
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361 views

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
486 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 ...
• 379
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 ...
• 101
532 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 ...
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