AutoCAD Inventor :: Simulation Testing Counter Balances On Fabrications
Dec 5, 2012
In inventor 2013 simulation what is the way to test a fabrication for counter balanced weight stability?
If you see the enclosed rough assembly. I have been playing with variouse stuff and not getting the results i want.
The idea is to work out how much weight the arm will hold without tipping over. and then by increasing the base size and weight or arm length i can then work out the ultimate design for my needs.
The way i want it to work is so that the base is just sitting on the floor as in real life with gravity and weight keeping it there and then as i apply weight to the arm see the tipping or load effect.
This upload is simple and i constrained the base via an axis on the edge put as soon as i run the symulation it just tips over and it shouldnt?
I have tried many other things but get a variety of results like the base suddenly flying off and a thousand miles an hout due to the contacts used ?
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Apr 17, 2012
If i want to see how stable a design is before it tips over after adding counter balanced weights etc. How would i set this up in dynamic simulation?
what i want to do is to mess about by distributing weights at key points to see how the model behaves / how stable it is, and i want to test it until it falls over, this will enable me to test it to it's limits.
I assume i need to place the design on a surface / floor with gravity on and set to the floor. it must be free standing initially.
the item needs to sit on the floor but must not be held back by any constraints so what contact do i use, would it be a spatial contact between the floor and the base component?
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Nov 29, 2011
IV 2011.
I have an assembly with a FEA simulation result. I can run a report and get the reaction forces and moments at each constraint. I would like to run a new simulation with different constraints and use the reaction results from the first simulation as loads in the second one.
Currently I do this by running a report on the 1st simulation to get a table of the reaction results. I then manually add those forces to the 2nd simulation. This takes time to type and the forces must be edited each time I re-run the 1st simulation.
Is there a way to use parameters to automate this?
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Jan 3, 2012
I'm currently using Inventor Professional 2012, and have been experiencing problems with virtual memory usage. In past versions of Inventor, the small bar graph counter at the bottom right-hand corner of the screen (Virtual memory counter? Not sure what to call it...) would "re-fresh" after closing a model, drawing, etc. (i.e. Once closing the file, the counter would change from yellow to green, bringing the virtual memory usage back to zero). However, this isn't happening with 2012, and I'm not sure if the problem is the way Inventor was installed onto my workstation, or if it's a problem with the hardware. A temporary solution has been to shut down Inventor when the bar graph gets too far into the yellow range (or red), and then starting up Inventor again.
Specs for my workstation are as follows: Windows 7 (32-bit), processor is Intel(R) Xeon(R) CPU W3503 @ 2.4GHz 2.39GHz, 3GB RAM.
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Feb 11, 2013
how to dump the counter of parameters of model:
d0, d1, d10, d12
became
d0, d1, d2, d3
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Apr 17, 2013
Much of our work is structures fabricated from steel plate. One of our practices is to add a note " (SK) " to the description of plates that have a detailed sketch somewhere in the fab drawing set (simple rectangular or circular plates with no additional features do not get these detailed sketches). The actual "detailed sketch" is just a dimensioned drawing view of that plate.
I've been working on automating this process so that Inventor can actually determine for the user whether or not the sketch is required. I have it in certain part templates by default. Other templates add the note automatically through iLogic when certain plate features are selected, or when the model consists of multiple part features.
This leaves one remaining case that the current set of rules can't catch - when the user creates cutouts, notches, etc. by modifying the sketch for the original extrusion. I have determined a method for catching that case, but haven't yet figured out how to program it.
What I want to do is count all of the lines, arcs, and circles in the first model sketch. If that count returns a number other than 4 lines, the note will be added. If any arcs are detected, the note will be added. If any circles are detected with lines also present, the note will be added. There may be other cases that will come up in testing that need to be covered, but I ran into an issue before I got that far. Construction geometry messes up the count - I need a way to exclude it.
Below is the test code I have so far for the counter. what techniques I can use to get construction geometry out of the count. This code doesn't include the provisions for actually adding the note yet - I'm just trying to get the counter working right first. Instead it's just displaying the total count in a message box for test purposes.
oDoc=ThisDoc.Document
oSketch=oDoc.ComponentDefinition.Sketches.Item(1)
LineCount=oSketch.Sketchlines.count
CircleCount=oSketch.SketchCircles.count
ArcCount=oSketch.SketchArcs.count
TotalCount=LineCount+CircleCount+ArcCount
MessageBox.Show("Total Count "&TotalCount, "Title")
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May 9, 2013
Any way to show clearly that there are counter bores on both sides of a plate. It does show the dotted lines for when it is on the down side of the plate, but in some sections i have a counter bore of the same diameter on both sides of the plate. Is my best bet just to to create two drawings of the upper and lower faces?
Also i've been trying to use the hole tables, something thats new to me, and i can get all the holes coming up, but im unable to get them to show up as actual counter bores, instead it shows up as two entries.
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Oct 28, 2013
what information regarding countersunk holes is exposed in the Inventor API? Can we extract individual values for the countersink diameter, the countersink angle and the through/straight hole diameter and depth?
While I'm at it, is there an in-depth reference document (PDF) for all of this information. The only thing I could find was an image of the object model but that only gets you so deep and doesn't have an explanation of any of the properties shown on the chart. (I tried searching for various hole-related properties shown on the chart and got zip.)
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Mar 7, 2011
I am trying to detect overlaps between two different features. They are, at the core, shape files from a GIS system and we have AutoCAD Civil 3D 2009.
I have reviewed the steps to test for Topo within a feature but don't know how to test topo between two features. I need to test for and identify "Overlaps" between feature A and Feature B and when Feature A is "Not Entirely Within" Feature B.
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Dec 11, 2013
I've created a successful FEA simulation in Inventor 2014 and obtained results. But I want to see the highest stress in a defined area that is smaller than the entire part (I have some stress concentrations that are throwing off my 'max'). Is there a way to probe an area instead of just a point? I'm tired of creating a dozen probes to find the 'local max'.
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Jan 23, 2013
How to create or how to set a one way rotation joint as a one way bearing will work on real life, is this possible?
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Apr 30, 2012
I'm developing a program which runs several simulations and obtains the results automatically.
I'm using the dynamic simulation API created in Inventor 2013. For that I use the GetResultValues(ByRef values() as Double) method of the class DSResult.
I used the method inside the VBA of inventor and worked well. But when I wrote the program in Visual Basic Express 2010, the method doesn't return anything.
I share an excerpt of the
Dim odoc As AssemblyDocument
odoc=invApp.Documents.Open(testPath, True)
Dim dsman As Inventor.SimulationManager = odoc.ComponentDefinition.SimulationManager
Dim dssim As Inventor.DynamicSimulation = dsman.DynamicSimulations.Item(1)
Dim oJoints As Inventor.DSJoints = dssim.DSJoints
oJoint = oJoints.Item(1)
[code]....
The method GetResultValues(values) should modify 'values' to a time,value vector.
It works well inside Inventor, but doesn't in the program in VB, although it runs the simulations and does everything else right.
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Oct 5, 2013
How to use dynamic simulation, i am creating a bench vise and woud like to animate it going in and out how would i do that?
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Sep 29, 2011
when in simulation, if you suppress a feature is it totally taken out of the simulations workings?
I.e. if I was working on a project like some weighing scales and I had a load of objects on the scales and I then suppressed some of the objects, will the scales rise up a little to counteract the reduced weight?
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Oct 30, 2012
Is this type of gravity experiment possible with dynamic simulation?
[URL].........
I made the cone ramp and double cone but the cone either goes the wrong way or only moves a few inches in the correct direction and then gets stuck. I’m using 3D Contact Joints and Spatial Joints and Gravity Force.
Version = Inventor Pro 2009
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Dec 11, 2013
I am trying to discover the dynamic simulation, so I need to know is that possible to create a new Load(Torque, Force) using API?
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Jul 13, 2012
i'm developing a hexapod robot and i want to simulate the motion of the robot's leg. The mechanical of robot's leg contain a servo motor that variate your angle between 0 to 330 degre. How can i delimite the angle of servo's rotation?
Other questions, is about the fixation with bolts. How can i do for the motion simulation respect the connection of the bolt? when i do a dynamical simulation the parts that contain bolts don't stay joints, i have to do a rule of fixation with constrains?
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Apr 10, 2012
I'm designing multiple elements for a vehicle. I need to evaluate multiple dynamic results of multiple possible designs. All the design is parametric so it modifies quickly but I can't find a way to run the dynamic simulation multiple times automatically and get the results from the output grapher for each simulation.
I am trying to do it via API but can't find the class of the dynamic simulation environment in the Object Model Chart to program it via .NET.
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Sep 26, 2012
I have installed inventor 2011 on my laptop, but the dynamic simulation menu does not appear even though I 've been many times to install it.
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Oct 21, 2011
I have a very simple part I am trying to check using FEA; however when I get into the Simulation environment and click 'New Simulation' from Ribbon nothing happens.
The part in question is just a simple cylinder (I'm verifying what would be the best meshing spec to use in a larger assembly).
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May 25, 2013
I am playing with traces in dynamic simulation and in the output grapher i get values for position like:
P
P(x)
P(y)
P(z)
and in the graph i get some values of the position but i am unsure on where the datum is at this point. I would of thought that the datum would be where the trace is attached? Where the datum is based and is it possible to set a relative datum to when the trace is set?
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Apr 18, 2012
I'm running several dynamic simulations via the API. Then I am getting the results to write in a text file. I want to know the force in a joint so I get the vector of values via
Dim oResults As DSResults
Dim oResult As DSResult
Dim value() as Double
Call oResult.GetResultValues(value())
this vector is a time, force vector but when I verify mi data against the Output Graphe all the decimal points from the force information are gone.
Example:
In Output Grapher
Time (s)Force(N)
0.0118955.66
0.0219500.88
In the vector from API
0.01
1895566
0.02
1950088
is there a way to correct this? I'm getting many force and movement info, so I don't know which ones are reliable.
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Nov 16, 2011
Is it possible to set a time delay on an applied force in simulation 2012? I would like to apply a force for a set amount of time?
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Mar 20, 2012
I have a question regarding simulations in Autodesk Inventor.
For example I have such part:
It is a plug made out of brass. I want to test if it will be able to withstand specified pressure. So I set up where is it constrained - on thread.
And set up pressure from inside on the cap to be 16 bar (1,6 MPa). And also assign materials. And there goes simulation . Everything seems alright. I want to run little bit different analysis. When pressure would be variable.
For example I will have pressure going from 12 bar to 16 bar, and such simulation will be running for quiet long time (as an example pressure will be 12 then raises to 16 then goes to 12 again and then raises to 16 again). I want to know after what time will this plug fail and will be destroyed? I mean i want to know when METAL will get tired and will be destroyed? I was just wondering if such a simulation is possible to be made in Autodesk Inventor?
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Jan 7, 2013
If you can imagine a cylinder sliding on curve joint. Let’s say the curve is in the XY plane. In the output grapher it is possible to display the force as the cylinder slides around the curve. However if I understand it correctly the magnitude of the force will be in the direction perpendicular to the point of contact between the cylinder and the curve? In which case is it possible to actually find out the individual X and Y components of the force? That is to say the magnitude of the force in the X or Y plane of the curve?
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Jan 18, 2013
Let me preface this by saying that we work mostly in the metal fabrication industry dealing with the elastic deformation of plastic materials that are isotropic so this question is a bit above my pay grade here.
Is it possible to simulate the stresses in a piece of glass in a simple beam scenario in Inventor (1/2" x 48" x 130" Tempered Glass)? I have a client that wants me to design a conference room table for him but I am highly uneducated about glass.
Is it possible to simulate? If not, is it possible to "fake" it and get semi-reliable results? We're at the conceptual stage here and we're curious which of our designs have a greater possibility of surviving the design validation process (which will include a glass expert at some point).
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May 21, 2012
Every now and then, but recently more then I want, I get a blue screen while doing a stress analysis.
I have a pretty simple assembly with just 2 parts in it. One of these parts is built as a multibody part. It can be that the blue screens started to occur after I made a multibody design, however I am not sure about that. I downloaded and installed Inventor R13.
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Oct 14, 2012
is their a possibility to applay stress like dynamic i have a shaft that has a pully on it , its conectet on an old way
not with a tight fit so it shrinks on it but it works wit a small cut in the shaft where its bolted with just a tiny metal plate.
at this place will be a stress concentration and i wanne see how the noth effect is when their is a dynamic load on it cause if i put a static load on it i know the shaft can handel it but i real life it has broken couple of times so this is what i want to investigate.
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Dec 16, 2013
I want to simulate the projectile of water from the bucket while tilting the bucket is it possible to make such type of simulation in inventor 2012?
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Jul 25, 2013
why there is huge difference in Dynamic Simulation results when you use two different input methods? I used input grapher and in linear ramp, I entered input (time/ distance) manually for 6 points and ran simulation. Then I used Spline and used a text file to enter SAME data and it gave me at least 10 times different results. Can't figure out why this difference. This changes my entire design.
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May 20, 2012
In AutoCAD 2008 vba, how can I test if the active UCS is the WCS? ThisDrawing.activeUCS will have a null value ID and using IsNull to test for it won't work. Heaven forbid the developers return the world, if the WCS is active.
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