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Engineering Stack Exchange

Questions tagged [modeling]

Use this tag for questions about numerical or analytical modeling and simulation of engineered systems.

Use this tag for questions about numerical or analytical modeling and simulation of engineered systems such as:

  1. analytical solutions to partial differential equations (PDEs) & ordinary differential equations (ODEs)
  2. Discretization techniques (Finite Element, Finite Difference, Discrete Element, Finite Volume, etc.)
  3. General Purpose engineering modeling and computer aided engineering (CAE) questions
227 questions
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8 answers

How do engineers really use numerical simulation?

Disclaimer I'm an applied mathematician by training, not an engineer. My work research primarily focuses on creating new "methods" to solve different PDE's related to solid deformation (elasticity) and fluid mechanics. In this sense, i know how to…
Paul
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votes
1 answer

Shear area of atypical section

Shear areas have been obtained for a few different cross-sections. I-sections usually define their shear areas as equal to the product of the height of the section and the thickness of the web (assuming they fall under the thin-walled…
Wasabi
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1 answer

Can a system with a response Y(x) = ax + c be called linear?

I made a DC-DC converter its ideal transfer function is: $$ V_0(D) = DV_i $$ I took measurements of its response and then made a linear regression, I got this result: $$ V_0(D) = 0.98DV_i -0.42 $$ Quite similar to the expected value. Now, can I…
Luis Ramon Ramirez Rodriguez
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0 answers

How can I model a plane's trajectory in a simple way?

I would like to model a plane trajectory, here are my assumptions and conclusions so far: Assumptions: we denote the plane's speed with $v(t)$, its trajectory $x(t)$, the total trajectory time will be $\tau$ we have start and end times of flights…
John
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1
vote
0 answers

Autodesk Inventor Constraints for Clockwise / Counterclockwise / Dead Points

In the YouTube video Spherical 4-Bar Infinity Mechanism by Thang010146, Dead Points are not compensated for by mechanical means. How can Autodesk Inventor Constraints be applied to such a mechanism to ensure that it does not change "modes" into a…
skibulk
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1
vote
0 answers

how to get more number variance compared as the csv output file of two model stl files in Cloudcompare

we are using the CloudCompare for comparing two mouth STL model for Final doctoral theses, like works done in this paper(pdf) shown blow: and the instruction said here: so i have tried to insert the STL file and use this align method : so the…
Soheil Paper
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0
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1 answer

Validity of dimensionless numbers

Dimensionless numbers are often used when studying complex phenomena such as in fluid dynamics or thermodynamics. In my studies we often used them, especially in these two subjects, where they helped quite a lot. The question I need help in…
RocketScience
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0
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1 answer

transfer function with constants

I have the following differential equation and I need to obtain the transfer function of Z / P but there are constants so I cannot factor to obtain the relationship, how could I obtain the transfer function of Z / P?
edwin vargas
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propeller air mass flow equation

I am trying to model a hovercraft and I need to obtain an air inlet flow ratio in (kg / s) of a propeller based on its dimensions (it can be the radius) and speed, is there an equation like that? Where could I find it?
edwin vargas
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0
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2 answers

Is there any device that can capture a picture into 3D model?

I am currently wondering is there any way or device that can transform a picture into 3D model automatically? or a machine learning thing to learn from picture (2D) into 3D model?
C.Karina91
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0
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1 answer

Parametric equations for fan blades

I'm looking for an explicit numerical example of a parametric surface (u, v) |-> (x(u, v), y(u, v), z(u, v)) that models a fan blade like that in the attached picture. Googling results in NURBS/PDE approaches but with no numerical explicit data. I…
Humberto José Bortolossi
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1 answer

Control System: offset issue with a simple valve model

I was reading a paper about a "Controller Design for Temperature Control of Heat Exchanger" and I couldn't understand how to model the valve used in the system. No need to read the paper as I will wrap up the whole issue: Given: capacity of control…
Latchup
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2 answers

I’m having trouble converting this orthogonal shape to isometric, I’m only a beginner and would really appreciate some help

Orthogonal to isometric shape, I need help with this as I’m only a beginner, please help me.
Abdul
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