Relaxation factor

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi,

 

What is relaxation factor?

Tagged:

Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

     

    Relaxation factor is primarily a number which is used to converge the solution.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    What should be the value of relaxation factor?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    Generally, value between 0.2 - 0.4 provides good balance between achieving small progression of solution and extra compute time needed to achieve the convergence.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    Is it necessary to give the value of RF?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2017

    Nice Question...!

     

    For simple problems, you can keep the value of relaxation factor at its default one. 

    As relaxation factor works on suppressing the solution (from previous iteration), surely it is going to take a lot of time. Taking the project span into consideration, you have to use it when it is really needed.

     


     

  • sagar_20757
    sagar_20757 Altair Community Member
    edited November 2019

    Hi,

     

    I was going through some research papers, where q-p relaxation method was mentioned for topology optimization.

    Where q- Relaxation parameter and P - penalization parameter.

    So, I would like to know, how to co-relate these q & P parameters with the parameter being used in optistruct for topology optimization.

     

    Thanks

  • acupro
    acupro
    Altair Employee
    edited November 2019

    You should probably post that question to the OptiStruct forum - rather than this AcuSolve forum.

Categories