Questions tagged [simulation]

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1answer
940 views

Nastran RBE2 coordinate change

I am looking for a method changing the coordinate system of RBE2 or RBE3 elements. Below is the nastran description of RBE2 in Nastran user guide. There is no field for coordinate configuration. ...
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0answers
257 views

How to model ball joint in Patran/Nastran?

I would like to model below mechanical system in Patran. But, I don't know how to configure boundary condition of ball joint. The ball joint is spherically rotated. When the described system is in ...
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3answers
3k views

How much force can a pole in ground take before falling?

Consider I have a pole stuck in the ground as illustrated below: When a force F1 is exerted on the pole, its bottom end will push against the ground it's stuck in; the ground then exerts a resistance ...
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1answer
1k views

Where does weight mass conversion ratio '0.00259' come from in Nastran?

I think this is very fundamental question. I am wondering why 0.00259 is used as weight-mass conversion ratio, when inch/pound unit is used in Nastran. Could anyone explain the reasons?
0
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1answer
118 views

How can I save mass, inertia, joint location and part orientation data from any 3D-CAD program to a CAD file?

I would like to be able to save, for example, a SOLIDWORKS(or any 3D-CAD program) assembly in some format that includes all the joint local/global locations and the parts global location and ...
6
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1answer
190 views

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 ...
0
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1answer
857 views

Simple, open source aerodynamics simulation software that can import Blender or Sketchup models? [closed]

What are some basic, open source aerodynamics or CFD simulation software that can import Blender or Sketchup models? I am looking for software that is easy-to-use, free, and suitable for educational ...
4
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0answers
145 views

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'...
0
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1answer
396 views

Calculation of unit mass of beam shell by using patran or nastran

I would like to know how to calculate unit mass of beam having uniform cross section, made by shell, by using Patran or Nastran, not by manual. Would there be any functions to calculate mass or unit ...
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1answer
92 views

Need motion equations for falling ball for simulating

I am currently MS student in artificial intelligence (AI) and working on my thesis on reinforcement learning, which robot should learn by itself how to control a quadcopter. Long story short, I have ...
3
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1answer
2k views

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 ...
2
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0answers
75 views

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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0answers
94 views

How can I apply remote force in Pro/E

I am a beginner in ProE and simulation. I would like to apply force in ProE simulation like below picture. Could anyone explain how to put the payload on a remote point?
1
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1answer
138 views

Simulation of Automotive Radiators

I'm going to simulate an automotive radiator . The method called $\varepsilon$- NTU , suggests following steps to calculate the heat rejection,$Q$, of a heat exchanger: 1-calculate $U$(overall heat ...
3
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0answers
250 views

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 ...
3
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0answers
131 views

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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2answers
93 views

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 ...
8
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0answers
6k views

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 ...
1
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0answers
43 views

Verify parameters variation in local sensitivity coefficients for microkinetic model

I’m performing a sensitivity analysis for a model of a set of elementary chemical reactions. I’m considering the variation in species concentration ($c_{k}$) with respect to the forward reaction rate ...
5
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0answers
276 views

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 ...
4
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1answer
406 views

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 ...
2
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1answer
624 views

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 ...
2
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0answers
1k views

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 ...
4
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2answers
2k views

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. ...
12
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3answers
5k views

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 (...
7
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2answers
1k views

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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