Questions tagged [simulation]
The simulation tag has no usage guidance.
160
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Which turbulence models are suitable for CFD analysis on a streamlined vehicle body?
Many commercial and open-source CFD codes implement several closure methods for the non-linear convective acceleration term of the Reynolds-averaged Navier-Stokes (RANS) equations. Common methods (...
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0
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Residuals of continuity not converging
I'm simulating a turbine.
The convergence of solution is monitored by checking the residuals of the numerically solved governing equations.
The "viscous-spalarat-almaras" model is used, and used air ...
- 899
7
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2
answers
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How can I model or simulate motion caused by an internal vibrating motor?
I have a vibration motor contained in an object. The motor looks similar to this:
When the motor is running, I want to simulate the movement of the container object that results from the vibration of ...
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6
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1
answer
202
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Programmable parameter change of Pro/E simulation by using Excel VBA , Matlab, Labview or Pro/E own function
Now, I've been conducting beam simulation by using Pro/E.
I would like to change payload(force) of beam step by step, and then plot the relation between deflection and payload(load range : 50kg to ...
- 354
5
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2
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What amplitude is used for a finite element modal analysis excitation?
In a typical finite elements analysis package, a modal analysis gives the N first natural modes, and it is possible to get the equivalent stress and total deformations for each of these frequencies.
...
- 587
5
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2
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ANSYS Workbench/Mechanical: Automatically export chart?
I'm running a simple tensile test simulation for a single element. Under Results I made a Chart object with Stress vs Strain, which can be manually exported to a csv file by right clicking on the ...
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5
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1
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164
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How do I model a longitudinal tensile strain in a laminate composite using Abaqus software? [closed]
I want to be able to measure the strain response in a material composed of 2 lamina, bottom one (0) top one half (0) half (90), and see the differences in the unidirectional versus the bidirectional ...
- 59
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324
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Explicit Dynamic ANSYS - Origami structure
I am working on a flat-foldable conical structure and I would like to carry out some dynamic tests on it (deployment to get the displacements and accelerations...).
I have designed the folded ...
- 73
4
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1
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475
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Different calculations for values of thermodynamic properties
While deciding what tool (library) to use for a simulation of a hybrid gas turbine plant, I found that different libraries/tools of thermodynamic properties yield different values than the other.
I ...
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4
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167
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How to compare small and large scale model of an IC engine to predict force, torque, rpm etc generated by actual engine?
I have this 6 cylinder radial engine designed in Solidworks.
Rendering
Blueprint (Source:Inventor Wizards)
And I want to perform some motion analysis on this engine to make some prediction about it'...
- 41
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2
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How to simulate the contact between two distant parts in Ansys workbench？
I made a test in Ansys but the result doesn't seem to be the final steady state. The two bodies didn't touch each other. How can I get the right result?
- 155
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3
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Non-Linear Analysis Convergence Problem in Ansys
I am currently conducting a static structural analysis study in Ansys and encountered convergence prolems.
I have a very large thermal gradient (almost 600°C) as input from a precedent transient ...
- 31
3
votes
1
answer
85
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Component-based simulation versus block-based simulation
Modelica touts as one of its advantages over Simulink that it is "component-based" whereas Simulink is "block based".
What exactly does this mean?
- 1,635
3
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Automotive Radiator Simulation
I'm developing a code to simulate thermal performance of automotive radiators.
My results are 40% under-predicted. But when I multiply them to 1.6, they match completely.
This is the graph that ...
- 141
3
votes
1
answer
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SolidWorks circuit simulation?
I use Labcenter Proteus Circuit simulation - you create circuit design, then apply current and see simulation in action - for example leds are blinking, or motor is rotating. If there is ...
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3
votes
1
answer
402
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Physics motion simulator for flying object
I want to see how different combination/position of fan on airplane affect stability of airplane.
I need simulator to test one of the idea which involves specific position for propeller on the plane....
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3
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1
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158
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How can I limit a simulated aircraft's angle of attack?
I am making an aircraft in a simulator (using JSBSIM). Note that I am not a professional.
The manual states that it is limited below certain calibrated airspeed to a certain positive angle of attack.
...
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0
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44
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I don't understand a simulation result of frequency vibration analysis of ultrasonic tranducer
I am building a ultrasonic transducer like this (with double-exponential (75%-25%) match and 2 ring PZT8 50x20x6.5 (for the moment I do not take account of pre-stress on bolt) :
When I simulate the 2 ...
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3
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0
answers
46
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How to measure / calculate Tait-Bryan angles of a moving platform in SimMechanics
I exported a model of the mechanism created in SolidWorks to SimMechanics in order to explore the possibilities of control. To solve the problem, i need to know the angular position of the mobile ...
- 232
3
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0
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326
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Single-phase fully-controlled thyristor converter simulation using simulink
I am trying to implement a simple single-phase fully-controlled thyristor converter using Simulink.
As load I have placed just an inductor, the firing angle is set to a=60 deg., f=50 Hz and the rms ...
- 31
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178
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Generating a IES file from an illuminaire and a lens
I have a IES luminaire file of a lamp and some polar candela distribution plots of lenses like:
How can I create a new luminaire file combining the lamp with every lens?
I could manually sample the ...
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2
votes
1
answer
91
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What filter is this?
I am implementing a second order filter.
It simulates hydraulic servo on an airplane. Its about 35-40 years old.
What confuses me is the notation. Like "2(.7)(52)S", what does it mean? If its just ...
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2
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1
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164
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How should the assignment to test software for a vehicle’s VCU be aproached?
As a graduation project, I was assigned to solve the following problem:
How can the vehicle’s behaviour be simulated in the form of a testing programme, with which the VCU software can be fully ...
- 1,194
2
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2
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Simulate Dust Layer on PV Cell?
Is it possible to simulate a layer of dust deposited on top of a PV cell in a controlled manner?
One potential method I had was to put a given weight of a particulate/powder (chalk powder, talcum ...
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2
votes
1
answer
70
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CFD simulation of an Air and Oxygen gas gradient in a microfluidics device
I am in the process of manufacturing a microfluidic device for use in research, and would like to do a CFD simulation of the interior of the device to see if an oxygen gradient is formed.
The idea is ...
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2
votes
1
answer
64
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What standards exist regarding diagnostic systems in automotive engineering?
I'm designing a diagnostic system that simulates an environment and user input for a dummy vehicle. All possible critical situations are simulated in order to find out whether any errors are triggered,...
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2
votes
1
answer
63
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Solidworks Motion capabilities
Is Solidworks Motion capable of finding the torque of the planet carrier (output) in a planetary gear set when in steady state? The sun and ring gears are both inputs and all gears are rotating at a ...
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2
votes
1
answer
441
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Problems regarding aspen simulation
I am trying to model water gas shift reactor on Aspen using an Rgibbs reactor. Unfortunately whenever i pass the stream into the reactor(HTS) the amount of CO and H2 both are increasing and C in the ...
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2
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1
answer
698
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Simulation of First Order System (Matlab & Simulink)
Yesterday, I tried to find constants $k_1$ and $k_2$ for the following system:
$$\frac{\mathrm d RH}{\mathrm dt}=k_1+k_2(RH_{ext}-RH).$$
Now, I have some first computations for $k_1$ and $k_2$ and ...
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2
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2
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Simulation modelling/ Digital twin of Injection molding process?
How can we make a digital twin of the Injection molding process in a production line? My idea is to do predictive maintenance and predict following downtime based on historical time series data of the ...
- 422
2
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0
answers
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How are circular dependencies dealt with inside MBSE?
How are circular dependencies (best) managed inside of MBSE environments? Let's say I have two properties that are linked to each other / they are linked to properties that affect each other.
How is ...
- 21
2
votes
1
answer
120
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Finite difference discretization of the Cauchy-Riemann PDEs
I made a forward fd-discretization of the Cauchy-Riemann PDEs but I am struggling to implement this in python.
I have a quadratic mesh with heighτ = $2*\pi$. The dirichlet boundary conditions are at $...
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0
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130
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Convergence problem in RANS simulation of unsteady flow
I am simulating an air flow through a two dimensional rectangular channel. The channel splits into two channels, one of them is followed by a 90 degree bend downwards and leads into a cylindrical ...
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2
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1
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differential drive vehicle in screen coords
differential drive vehicle in world frame
what would change in the kinematic model of the differential drive vehicle if i wanted to simulate it
using pygame module in python ( pygame or opencv or any ...
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2
votes
1
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244
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what is the difference between jblade, qblade, and xflr5 softwares?
I am working on a propeller design, and I've came through Jblade which helped me in the airfoil design, yet as I can remember, xflr5 can also do this...
doing some internet search, i found that Jblade ...
2
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0
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Solidworks Simulation- Large displacement with Inertia Relief
I'm trying to use the Solidworks simulation package to solve for the stresses inside a body as it accelerates (very rapidly). Because I expect some small features to deform quite a bit, I need to use ...
2
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0
answers
126
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Bolted joint junker test with finite element method
Anybody knows a tutorial to make a finite element analysis for bolted joints like junker test(fastener vibration) in Solidworks or Ansys?
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2
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0
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941
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How to simulate an exhaust fan condition in ANSYS Fluent?
I'm trying to simulate a model which has one inlet and three outlets, and I'm passing air through it. Now, I want one of the outlets to have exhaust fan. I see options of exhaust fan and outlet-vent ...
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2
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0
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Abaqus Milling Simulation
I'm creating a simulation in abaqus of a endmill removing material from and aluminium plate. The simulation is almost working, but only the surface level element are being removed from the plate. The ...
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0
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Does excitation matter in a time-domain simulation/computation of a transfer function of an LTI system?
Let's say I am running a FDTD simulation of a wave-equation to determine a transfer function of an LTI system:
\begin{equation}
H(f) = \dfrac{Y(f)}{X(f)}\
\end{equation}
where $Y(f)$ and $X(f)$ are ...
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How to calculate the Jacobi of electron/hole continuity equations for semiconductors with respect to potential when applying Newton's method?
These are the discretized drift diffusion equations as taken from the book "Analysis and Simulation of Semiconductor Devices" by Siegfried Selberherr. The electron continuity equation is:
$$\begin{...
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Inventor: How to replace static part with articulation?
I have downloaded the following part file of a servo motor as IGES from the vendor:
I have then built an assembly that uses several of these motors, as well as a number of idlers/hubs, brackets, ...
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What data do I need to plot a BSFC map
I have an 4 stroke spark ignition engine simulator which takes user inputs and outputs performance data.
I need rpm, torque and brake specific fuel consumption (bsfc) to plot the bsfc map. I am able ...
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2
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Is there any aspect of an Explosion resulting from a nuclear weapon test that cannot be simulated using super computers?
This Washington Post news article states that with the advent of computer simulation of nuclear tests, live tests are no longer needed.
Generally speaking there are 3 aspects of an Explosion resulting ...
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1
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How to convert Joules(kinetic energy) plot chart into watts?
How to convert Joules(kinetic energy) plot chart into watts?
Anyone know how?
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4
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Software options for simulating oil flow in small diameter pipes [closed]
I'm looking for 1D software packages that can simulate flows of oil (lubricant) in pipes of a small diameter (typically between 1mm to 12mm in diameter) and have found around 10+ possible candidates, ...
- 508
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2
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230
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Non-Clutch Vehicle Drivetrain - How Does it Work?
I am making a vehicle simulation, but just noticed a big issue - there are a lot of cars with no clutch in them, but I haven't driven a car with automatic/clutchless-manual gearbox, nor been even a ...
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1
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How to implement a Monte Carlo Simulation for studying uncertainty in dynamic stiffness?
I have a dynamic mechanical system of the form:
$$\mathbf{M{\ddot q}+{\Omega_c}G{\dot q}+{Kq}=F(t)}$$
and I need to introduce some uncertainty for the $K$ parameter, which is a symetric matrix of $q$ ...
- 409
1
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1
answer
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Simulating production of a product by a machine
I'm a beginner and trying to learn simulation modeling. My aims for simulation includes;
A firm receives 5000 orders per week. 120 products are manufactured in an hour. The machine runs for 4 shifts ...
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1
vote
1
answer
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Modeling a simple capacitor
Hey guys I am trying to model the performance of a hypothetical capacitor.
Capacitance depends on its geometry, but the charging and discharging of the capacitor depend on a resistive load within the ...
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