Quiz - Time Integration - ANSYS Innovation Courses

Quiz Summary

0 of 10 Questions completed

Questions:

You have already completed the quiz before. Hence you can not start it again.

Quiz is loading...

You must sign in or sign up to start the quiz.

You must first complete the following:

Results

Quiz complete. Results are being recorded.

Results

0 of 10 Questions answered correctly

Your time:

You have reached 0 of 0 point(s), (0)

Current
Review
Answered
Correct
Incorrect

Question 1 of 10

1. Question
What is the purpose of time integration?
- 1) Solve problems in a coupled space-time domain
- 2) Solve problems in time domain
- 3) Solve problems in frequency domain
- 4) None of above
Question 2 of 10

2. Question
What is the benefit of explicit time integration?
- 1) More effective for highly nonlinear problems
- 2) No need to inverse stiffness and mass matrices
- 3) No need to perform equilibrium iterations
- 4) All of the above
Question 3 of 10

3. Question
Why initial conditions are required for dynamic analysis?
- 1) Required by time integration method
- 2) Define deformation and stress status at initial time, i.e., time = 0
- 3) By default, all bodies are at rest, unconstrained, and stress free
- 4) All of the above
Question 4 of 10

4. Question
Which of the following statements is NOT true?
- 1) Using rigid body dynamics reduces the computational time significantly
- 2) For quasi-static simulations, generally implicit time integration methods are used
- 3) Implicit time integration always gives more accurate results than explicit time integration
- 4)Generally explicit time integration methods are used when simulating a car crash test
Question 5 of 10

5. Question
Which of the followings is NOT required in Explicit Dynamics analysis?
- 1) All bodies must be constrained so no rigid body motion can occur
- 2) Initial conditions
- 3) Every material has density
- 4) Yield stress should be defined for all materials
Question 6 of 10

6. Question
In order to satisfy time integration stability, which one of the followings is required in Explicit Dynamics analysis?
- 1) Use high-order elements
- 2) Use low-order elements
- 3) Time step must satisfy CFL condition
- 4) Apply fixed support boundary condition
Question 7 of 10

7. Question
What is mass scaling used for in Explicit Dynamic analysis？
- 1) Increase the mass of some elements to increase the time step
- 2) Fix bad element ratio
- 3) Reduce running time
- 4) Increase the mass of all elements to increase the time step
Question 8 of 10

8. Question
Which of the following statements is true?
- 1) Rigid body dynamics does not need mesh
- 2) Explicit time integration is not suitable for long-duration problems
- 3) Implicit time integration needs to solve force convergence at each time step
- 4) The time step needs to satisfy CFL condition for both explicit and implicit time integration
Question 9 of 10

9. Question
Which statement is true about CFL condition?
- 1) An explicit dynamics simulation goes unstable when CFL condition is violated
- 2) It controls the maximum time step
- 3) It is inversely proportional to Young's modulus
- 4) All of the above
Question 10 of 10

10. Question
Compared to Implicit Dynamics, a rigid body dynamics simulation:
- 1) Needs smaller time steps
- 2) Is easier to converge
- 3) Generally requires less computational time
- 4) All of the above

Quiz - Time Integration

Quiz - Time Integration

Quiz Summary

Information

Results

Results

Categories

1. Question

2. Question

3. Question

4. Question

5. Question

6. Question

7. Question

8. Question

9. Question

10. Question