These can be defined by the 3 real constants: K1 (UX, UY), K2 (UZ) and K3 (ROTX, ROTY).ДЇor this example, we will use high values for K1 through K3 since we only expect the model to rotate about the Z axis. 'Set 1' will now appear in the dialog boxДЇive of the degrees of freedom (UX, UY, UZ, ROTX, and ROTY) can be constrained with different levels of flexibility.

Enter the following properties, then click 'OK'.

Preprocessor > Real Constants > Add/Edit/Delete.

Real Constants must be defined for each of the 3 element types. In the 'Element Types' window, there should now be three types of elements defined.

Select 'Combination', 'Spring damper 14'.Select 'Combination', 'Revolute Joint 7'.Click on 'Apply' You should see 'Type 1 PIPE16' in the 'Element Types' window.Д¬OMBIN7 (Revolute Joint) will allow the catapult to rotate about nodes 1 and 2.Preprocessor > Element Type > Add/Edit/Delete.With 6 degrees of freedom, the PIPE16 element can be used to create the 3D structure. This element has 6 degrees of freedom (translation along the X, Y and Z axis, and rotation about the X,Y and Z axis). It is therefore required that the types of elements are defined prior to creating the elements. ДЇor this problem, 3 types of elements are used: PIPE16, COMBIN7 (Revolute Joint), COMBIN14 (Spring-Damper). Give example a Title Utility Menu > File > Change Title.The catapult is built from steel tubing with an outer diameter of 40 mm, a wall thickness of 10, and a modulus of elasticity of 200GPa. obtaining/storing scalar information and store them as parameters.ДЄ 1000N vertical load will be applied to a catapult as shown in the figure below.

elements COMBIN7 (Joints) and COMBIN14 (Springs).

This tutorial was created using ANSYS 5.7.1.

Ansys element types