Learning Forum

[nhanani4]

Hi,

I'm newbie using ansys aqwa.

In my study, multi - floating structure connect use ball and socket connector.

I want to ask:

1) Did the detail of ball connector should key in such as stiffness about local X and other if I want to used the ball connector? Or I use the ball connector but the detail of connector should i blank and run the simulation like picture two?

2) What the default stiffness of ball connector if  the detail of blank connector is blank?

3) The ball connector i put has the angle like picture 1. Should i key in the detail data like picture 2. But what formula should be calculate for the detail connector?

Thank you for helping me.

[Shuangxing Du]

The items in the Joint Properties are optional. If there is no data being typed in, the default is zero.  For a ball and socket joint, its joint local axes coincide with the axis directions of the global coordinate system axes at the initial definition localtion.

[nhanani4]

1) what is the formula of stiffness about global x, stiffness about global y and global z should I key in?

2) I want to connect my multi-floating structure in that picture arrangement but only the ball and socket connector can run the data horizontal force. What should I do to run simulation with change the ball socket to hinge?

Thank.

[Shuangxing Du]

(1) Please see Aqwa theory manual, section 8.1.2 for the ball/socket joint rotational stiffness definition.

(2) Please see Aqwa User's Manual, Section 5.8.6 for joint definition

[nhanani4]

Mean I should make some calculations for key in the data for stiffness about X,stiffness about Y, and stiffness about z?

I think that ball socket has default data because when I blank that section,I still get the data joint ball socket.I have wrong idea right?

[Shuangxing Du]

Could you please show the contents of the data category 12 of your input data file with the extension name of .dat generated by Aqwa in Workbench? I do not think there is any default non-zero values for the ball and socket joint stiffness.

[nhanani4]

where i canfound data category 12 in .dat file? i see until deck 17. can you help me?

[nhanani4]

this dat file for ball socket. how i can get the stiffness for ball scoket?

 

this dat.fie.. is is category 12 mean deck 12?what the mean by that value?

tq