Harmonic Response Analysis in Ansys Mechanical

Performing Mode Superposition Harmonic Analysis - Lesson 1

Correctly Interpreting Harmonic Results - Lesson 2

Utilizing Residual Vector Method in Harmonic Analysis - Lesson 3

Frequency Based Fatigue using Harmonic Analysis - Lesson 4

Performing Harmonic Analysis with Full Method - Lesson 5

Practice Quiz & Simulation Exercise

2 Quizzes

Course Assessment - Harmonic Analysis in Ansys Mechanical

Simulation Exercise - Harmonic Analysis in Ansys Mechanical

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Course Assessment - Harmonic Analysis in Ansys Mechanical

Harmonic Response Analysis in Ansys Mechanical Practice Quiz & Simulation Exercise Course Assessment - Harmonic Analysis in Ansys Mechanical

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Question 1 of 10

1. Question
Which of the following statements hold TRUE with respect to natural frequencies? Select the two best options.
- Natural frequencies determine how a system responds when subjected to dynamic loads.
- Every system doesn’t have natural frequencies.
- The frequencies at which a system vibrates with increasing amplitude are called natural frequencies.
- Every system can have only one natural frequency.
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Question 2 of 10

2. Question
Which statement holds TRUE with respect to Mode-Superposition Method? Select the best option.
- In the mode-superposition method, summation of mode shapes is used to determine the response of structure.
- In the mode-superposition method, a linear combination of mode shapes is used to determine the response of structure.
- In the mode-superposition method, only one mode shape is used to determine the response of structure.
- All of the above
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Question 3 of 10

3. Question
Which results are of high interest for a Harmonic Analysis? Select the two best options.
- Deformation at resonant frequency
- Deformation at any frequency
- Stress at resonant frequency
- Stress at any frequency
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Question 4 of 10

4. Question
What information does a Frequency Response plot provides? Select the three best options.
- Displacement at the location of peak response
- Stress at the location of peak response
- Frequency at peak response
- Phase angle at the location of peak response
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Question 5 of 10

5. Question
How do the residual vectors help in MSUP Harmonic Analysis? Select the two best options.
- Helps to identify the areas of the nonlinear contacts that cause the convergence difficulty.
- Employ additional transformation vectors in addition to the eigenvectors in the modal transformation.
- They are combined with the natural frequency mode shapes to compute the response more efficiently.
- Helps to identify the prominent modes from the Modal Analysis.
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Question 6 of 10

6. Question
What to do for a large model when we are not sure whether to include Residual Vectors or not? Choose the best option.
- Run a Transient Structural analysis and check if we see a localized deformation of the structure and if such deformation is not reflected in the calculated mode shapes.
- Run a Static Structural analysis by replacing the time-varying load with a constant load and check if we see a localized deformation of the structure and if such deformation is not reflected in the calculated mode shapes.
- Run a Modal Analysis and check if the local deformation is captured in the first few modes.
- Run a Modal Analysis and extract as many modes as possible to have accurate results, even if it is computationally expensive.
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Question 7 of 10

7. Question
Which of the following statements hold TRUE with respect to Fatigue Failure? Choose the two best options.
- Fatigue failure may occur only at high stresses that are required to cause yielding of components.
- Fatigue failure may occur even at stresses much lower than those required to cause yielding of components.
- Harmonic loading may cause major cracks to form in the component leading to fatigue failure.
- Harmonic loading may cause microcracks to form in the component leading to fatigue failure.
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Question 8 of 10

8. Question
In harmonic fatigue, we look at time to failure instead of number of cycles to failure. Which important factor is responsible for this change? Choose the statement which best answers the question.
- Fatigue tool has the options for conversion of frequency domain to time domain.
- Harmonic fatigue can be evaluated for one frequency.
- Harmonic fatigue can be evaluated for more than one frequency.
- Fatigue tool has the options for scaling the fatigue results.
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Question 9 of 10

9. Question
While performing Harmonic Analysis, which of the following problems needs to be solved using the Full Method? Select the three best options.
- Vibroacoustic Problems
- Bearing Problems
- Light Damping Problems
- Viscoelasticity Problems
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Question 10 of 10

10. Question
Which of the following statements are TRUE with respect to the Full Method for Harmonic Analysis? Select the two best options that are correct.
- Full Method of Harmonic Analysis is useful for solving moderate-to-large damped systems.
- Full Method of Harmonic Analysis is useful for solving lightly damped systems.
- Full Method of Harmonic Analysis doesn’t support all types of boundary conditions and loads.
- Full Method of Harmonic Analysis supports all types of boundary conditions and loads.
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