Revolute Joint - Statik Stifness Problem

Omer Faruk GUMUS_21691

Hi,

I would like to model a door latch mechanism with pin wrapped a spring as below. So I read in radioss book and hyperworks help that it is recommended to use a Type spring 8 to represent a revolute joint.

But as you guess, that type of spring has tension in the static state, and as it rotates its tension increases. So how I implement this situation for pin surrounded with spring in Radioss?

Thanks in advance.

 

Simon Križnik

Hi Omer Faruk GUMUS,

 

This query was already treated:

https://community.altair.com/community?id=community_question&sys_id=274604b61b2bd0908017dc61ec4bcb44

Pin hinge with torsions spring can be modeled with type 13 spring in combination with a preloading function (torque vs. angle) defined in the appropriate rotational DOF.

The same can probably be done with type 8 spring.

 

Altair Forum User

Altair Forum User said:

Hi,

I would like to model a door latch mechanism with pin wrapped a spring as below. So I read in radioss book and hyperworks help that it is recommended to use a Type spring 8 to represent a revolute joint.

But as you guess, that type of spring has tension in the static state, and as it rotates its tension increases. So how I implement this situation for pin surrounded with spring in Radioss?

Thanks in advance.

 

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Hi,

 

What is the objective of the analysis?

 

If OK, you can try with MotionView and MotionSolve

Simon Križnik

Hi,

 

I have made 3 simple models to show the different ways to simulate preloaded spring hinge in Radioss using Type 8, 13 and Kjoint2 springs. 

 

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