Dynamic Analysis In Ansys Tutorial Pdf

[Raguel Charrette]

In the current dynamic analysis case, we will assume that the car is hitting a stationary wall, which can be modeled as a rigid body. The vehicle is considered to be in a state of motion and moving with a velocity of 30 miles/hour.

I have determined the Engineering data (Saved my project), including the material properties and selecting the hyper-elastic material model, build (import) my Geometry and model and I inserted Construction Geometry (Path), as well as Cylindrical Coordinate System and Symmetry (Cyclic Region) to investigate the stress analysis of a part of my cylindrical (rubber) sample.

I want to define the analysis settings, which means that I want to input Displacement data for the transient dynamic analysis and Fixed Support on the surface of the model that do not undergo any forces (loads). I have tried to input as Initial condition the velocity to be equal to zero.

I made some efforts to input displacement data I have from my Excel file, through right-click on Displacement to define Geometry and (Insert) Tabular data (direction) in component Coordinate system, by choosing the axis/ direction in which my model supposed to appear the displacement. I have not managed to do this and have the results that the Ansys tutorial videos show.

I want to determine in Solution options of Deformation, Equivalent stress, Maximum Principal Stress and Strain in the displacement direction (Coordinate System) in which my model deformed and in this case is Y axis. However, I have to define the Analysis settings to be able to go on to the next steps.

Could anyone help me with these two problems? Any suggestions why I cannot add (input) Displacement values and Fixed Support so that to be/shown implemented (defined) in the study, and to complete the analysis?

Then I take the time values/variation from excel which are every say 0,1 s and a second column with the displacement (m), which are every here say 0.05 m, and copy paste that into WB (see the marking and black arrow).

I am using Ansys APDL Mechanical 2022. I inserted a time dependent function (10*Sin(PI/4*Time)). When I assign this as displacement at a free end of a cantilever beam, I get this error. "Label 0 does not support tabular boundary condition." Can you please help me resolve this error?

I have an interest in the automotive industry, since I am a mechanical engineering student I want to learn more about engineering simulation such as engineering design for suspension (stress analysis and so on)

the myth that spread in my circle is "learn cad from Inventor/SW and learn simulation in Ansys, Ansys will give you a wider range of set up condition(meshing, boundary, and so on), the industry will let you using Ansys/Abaqus to do a simulation"

could everyone give a point of view from it? honestly, I am very happy and want to learn more about dynamic simulation, even more, JDMather has lots of tutorials in his channel, but this problem really makes me confused

Hi! As a student, you should try to learn the theory behind these tools. In terms of CAD or Simulation tools, most work very similarly. If you can learn one, more than likely you can pick up others fairly quickly. But, you need to develop the basic engineering sense. These tools won't help you on that.

Most big companies use multiple tools. It is very rare to use one tool for the entire product development cycle. The tool of choice depends on many factors. Cost, training, ease of use, complexity of the project, performance, personal preferences, security, and other factors. Think of it like a toolbox. You don't just put a swiss army knife in the box. You need socket wrenches, a mallet, screw drivers, pliers, hardware, and so on. The point is that you choose the right tool, not the tool chooses you. There are just plenty of tools to select. If one does not work for you, there is always a replacement. However, your engineering judgement cannot be replaced.

Regarding dynamic simulation in automotive industry, I don't believe mid-range tools like Inventor or ANSYS is used (not 100% sure). But, these tools and more sophisticated ones all run on the same physics theory. Likewise, as any software, there will be bugs. There will be cases exceeding its capability. However, for learning purpose, they are more than adequate. I don't think you should be fixated on the tools. You should first study what problems you are trying to solve. Then find the right tool. This will help you learn quicker and you will be able to adopt to professional world much more easily.

From my perspective, the myth in your friend's circle isn't a bad, I would suggest you learn CAD from Cad software and analysis from analysis software while you are in school. Ansys and other specialized analysis software are much more specialized and much more capable, yes, but are alot more expensive and a lot less accessible after you leave school, so take advantage of it while you can.

In my school, we learned Femap with NX Nastran. Coming from that, I was able to learn Inventor Nastran pretty easily in comparison. I use both at work. Inventor Nastran is much more convenient to use, but is also much less powerful (even though it uses a Nastran solver, Inventor offers very little in terms of mesh settings), and much more buggy.

As a final note, learning to learn will be more valuable than learning a specific piece of software. It's almost guaranteed that you will have to learn other software when you get a job. I learned Solid Edge in school, my first job used SolidWorks, now I use Inventor, and am learning fusion 360. So I would embrace the idea of learning all you can in school and be ready to keep learning after school is over!

Modal analysis studies show how structures vibrate (natural frequencies, mode shapes, damping ratios). It's vital in engineering for designing robust structures, controlling vibrations, failure analysis, optimization, and product development in industries like aerospace and automotive.

Modal analysis is employed to study the dynamic behavior of structures and mechanical systems. It determines natural frequencies, mode shapes, and damping ratios, essential for designing robust structures capable of withstanding dynamic loads. This analysis aids in controlling vibrations in applications like aerospace and automotive engineering. By understanding modes and frequencies, engineers can optimize designs, identify potential failures, and ensure products meet safety and performance standards. It plays a pivotal role in product development, offering insights into structural integrity and aiding in the overall enhancement of mechanical systems for various engineering applications.

This incorporation of simulation when designing is less about going into a full range of full fidelity simulation tools to guide your design decisions, and more about using accurate, easy-to-use studies that operate in real time as you edit parts of your design to quickly gauge if something will work or not.

Use modal analysis to calculate the natural frequencies and mode shapes of your model. You can also see the response to the natural frequencies of your model when it is subjected to time-dependent and/or oscillatory/vibration loads by running any dynamic analysis: dynamic time, dynamic frequency, dynamic random, or dynamic shock. Perform a modal analysis when you want Creo Ansys Simulation to calculate the natural or resonant frequencies (eigenvalues) of the model. Creo Ansys Simulation can also determine the relative displacements of the geometry when the model is vibrating at natural or resonant frequencies.

While there are several analogous ways to test for modal analysis, we use the analytical approach using Finite Element Analysis. This utilizes numerical methods to simulate and analyze the dynamic behavior of structures. It involves creating a finite element model of the structure and solving equations of motion.
To learn more, reference this support article.

Modal analysis in the context of Finite Element Analysis (FEA) is a numerical method used to study the dynamic behavior of structures. FEA is a computational technique that divides a complex structure into smaller, simpler elements, allowing engineers to analyze and simulate its behavior under various conditions. Modal analysis, specifically in FEA theory, focuses on extracting the natural frequencies, mode shapes, and damping ratios of a structure.

Modal and buckling analysis are crucial in structural engineering to assess the dynamic and stability aspects of a design. Modal analysis helps determine the natural frequency modes of vibration, essential for understanding a structure's response to dynamic forces. It automatically handles rigid modes, providing insights into unconstrained vibrations. On the other hand, buckling analysis is vital for assessing structural stability, identifying critical loads, and solving unstable snap-through problems. By determining buckling loads, engineers can ensure designs withstand compressive forces without catastrophic failures. Together, modal and buckling analysis contribute to optimizing structures, preventing resonances, and ensuring stability under various loading conditions.

When you want a comprehensive analysis of your model while you design, choose Creo Ansys Simulation (CAS) or Creo Ansys Simulation Advanced (CASA). While both are built for design refinement and validation, CASA has the added benefit of supporting use cases like non-linear contact and non-linear materials. CASA also allows you to run combined structural and thermal studies.

ANSYS is a finite-element analysis package used widely in industry to simulate the response of a physical system to structural loading, and thermal and electromagnetic effects. ANSYS uses the finite-element method to solve the underlying governing equations and the associated problem-specific boundary conditions.

This ANSYS short course consists of a set of learning modules on using ANSYS to solve problems in solid mechanics. The learning modules lead the user through the steps involved in solving a selected set of problems using ANSYS. We not only provide the solution steps but also the rationale behind them. It is worthwhile for the user to understand the underlying concepts as she goes through the learning modules in order to be able to correctly apply ANSYS to other problems. The user would be ill-served by clicking through the learning modules in zombie-mode. Each learning module is followed by problems which are geared towards strengthening and reinforcing the knowledge and understanding gained in the learning modules. Working through the problem sets is an intrinsic part of the learning process and shouldn't be skipped.

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