Simulation Quiz 3

Linear Dynamics using Ansys Mechanical - Simulation Quiz 3

Complete the simulation and have all the results ready BEFORE starting the quiz.

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1 / 10

Which of the following is TRUE regarding Step Controls in transient analyses using the mode-superposition method?  Select the best option.

Same time step size is used throughout the solution

Maximum number of time steps allowed in the mode-superposiiton transient method is 2.

Time Integration is always OFF for mode-superposition transient method 

Different time steps can be applied to different load steps

2 / 10

Review the Total Deformation of the corner vertex of the side rail. What is the Total Deformation at 0.04 s? Select the option that is closest to the correct result.

0.03 mm

0.23 mm

0.33 mm

0.13 mm

3 / 10

Review Total Deformation at the corner vertex of the side rail and consider the applied Acceleration load. Select the best option below that is a correct statement.

The Total Deformation at the vertex is very similar in response to the Total Velocity at the vertex.

The Total Deformation at the vertex does not show a similar trend as the applied acceleration because the structure’s deformation is an independent dynamic response.

The Total Deformation at the vertex shows a similar trend as the applied acceleration because it is relative to the base.

The Total Deformation at the vertex is very erratic since it shows the dynamic response of the compliant side rail as it is being impacted.

4 / 10

Without rerunning the analysis, consider a situation where the mass of the occupant is 50kg. How will this increased mass affect the maximum Total Deformation over the complete time of collision?  Select the best option.

Maximum Total Deformation for the given Model will remain the same.

There is no relation between the mass of the occupant and the Total Deformation result, so this question cannot be answered without solving the model under the new condition.

Maximum Total Deformation for the given Model will increase 

Maximum Total Deformation for the given Model will decrease  

5 / 10

The graph shown here represents the Directional Acceleration oriented along which coordinate direction scoped to the corner vertex of a side rail. Select the best option closest to the correct result.

X axis

Y axis

Z axis

None

6 / 10

Which of the following is TRUE when applying an Acceleration load in the mode-superposition transient method?  Select the best option.

Acceleration load can only be applied if Base Excitation option is set to “Yes”

Acceleration load with “Base Excitation: Yes” can be scoped to a non-support location 

It is possible to obtain relative or absolute motion with an Acceleration load when “Base Excitation” is set to “No”

It is possible to obtain relative or absolute motion with an Acceleration load when “Base Excitation” is set to “Yes”

7 / 10

Which of the following methods can be used to connect the result of Modal Analysis to the setup of a Transient Analysis to use the mode-superposition method? Select the two best options.

Linking Setup Cell of Modal Analysis to Transient Analysis in Workbench 

Introducing Transient Structural Analysis System from Environment Tab in Ansys Mechanical and using Modal conditions in Modal Environment definition 

Introducing Transient Structural Analysis System from the Home Tab in Ansys Mechanical and using default initial conditions  

Linking Solution Cell of Modal Analysis to the Transient Analysis System in Workbench

8 / 10

When solving a transient analysis using the mode-superposition method, which of the following connection types should be avoided because it does not behave as defined? Select the best option.

Bonded Contact  

No Separation Contact 

Frictional Contact

Shared Topology 

9 / 10

Without rerunning the analysis, consider a situation where we vary the damping ratio, while keeping rest of the parameters same and observe how it affects the vibrational behaviour of the car seat. Case A has a damping ratio of 0.05 and Case B has a damping ratio of 0.2. Which of the following statements are correct, considering the above scenario? Select the 2 best options. 

Case B would experience a higher peak deformation

Case B would see vibrations dampen out more quickly after 0.076 seconds

Case A would see vibrations dampen out more quickly after 0.076 seconds

Case A would experience a higher peak deformation

10 / 10

The graph shown here represents which of the following results scoped to the corner vertex of the side rail? Select the best option closest to the correct result.

Total Velocity v/s Time 

Equivalent Stress v/s Time  

Total Acceleration v/s Time

Total Deformation v/s Time 

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Linear Dynamics Using Ansys Mechanical

Total Available Time - 30 mins

Total Number of Questions - 10