Questions tagged [modeling]
Use this tag for questions about numerical or analytical modeling and simulation of engineered systems.
11
questions
21
votes
8answers
2k views
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) ...
7
votes
2answers
843 views
How do I use FEM to derive the torsional constant of an arbitrary shape?
In this question I ask about how to perform a first-principle derivation of the torsional constant of a section. It appears that there is no such analytical derivation for torsional constant, so my ...
7
votes
2answers
1k views
How do you model a real-life truss in structural analysis software?
I am trying to recreate the following model of a wooden roof truss provided to me by a truss manufacturer:
My question is twofold:
What is the common/correct way to model the boundary conditions and ...
6
votes
1answer
523 views
Differential equation of the vertical displacement of a cable
Given a cable (totally flexible) fixed at both ends, subjected to a vertical force $f(x)$ in his plane, with variable area $A(x)$, and variable elasticity $E(x)$ I want to find the differential ...
5
votes
4answers
4k views
How to simulate car acceleration
I am a high school physics student and I've been trying to simulate the acceleration of a car as it fully accelerates from rest, but I'm finding it's much harder than I thought. Here was my first ...
10
votes
1answer
272 views
Developing a stochastic differential equation model for concrete fibers
I am working on modeling concrete fibers (metallic fibers) as a mathematical model. My work is for my thesis. I am a PhD student of numerical analysis, but I am working on a real tunnel project.
I ...
10
votes
2answers
621 views
Differential equations of a (simplified) loading bridge
I am having trouble to calculate the differential equations of a simplified loading bridge.
The system is build as shown in the picture below (just a sketch):
If I use the Newton approach, I am ...
5
votes
1answer
139 views
System Identification 1-d altitude control
One dimensional altitude control of a hovercraft. The model's dynamic equations that I came up with are, I treat the hover craft as a rigid particle and my goal is to have it hover at or reach a ...
3
votes
1answer
420 views
How to model Motor Windings in Solidworks?
I want to model a DC motor in order to eventually do some simulations (temperature/cooling related) and I'm wondering what is the best way to model the motor windings?
I've seen a few video's on how ...
3
votes
1answer
71 views
Modelling of Ball and Beam System
I'm trying to model a basic ball and beam system using Euler-Lagrange Equation. My system looks something like this
I have come up with this final Euler-Lagrange Equation:
Where JB is the ball's ...
0
votes
1answer
63 views
Calculate forces/ torques on a parallel spring array
I am stuck on the calculation of forces on a certain system involving parallel springs.
The schematic of the system is as follows:
The lower plane is fixed and the upper plane movable. There is a ...
