## General Mechanical

Topics relate to Mechanical Enterprise, Motion, Additive Print and more

#### How to set-up degree-of-freedom constraint between nodes on a flexible body and a point mass

• CW62
Subscriber

I have modelled the cool down from cure of a square composite plate with an unsymmetric [0/90]T lay-up resulting in the composite plate developing curved deformation and bistability. The boundary conditions I have applied to the plate to predict the deformation of the plate after cooling down from 160°C to 20°C are as follows: the centre of the plate is fixed in the x- and y-directions; each corner is fixed in the z-direction while x- and y-translation and rotation about x- and y- are permitted at each corner, a temperature difference of -140°C is applied to the plate; a temporary force in the +z-direction is applied to get the plate to converge to the stable state that has positive deflection of the centre of the plate. A static analysis with NLGEOM activated is used to simulate the cool-down process.

I now wish to model the dynamic response of a system consisting of the plate coupled to a linear oscillator (LO) consisting of a mass, linear spring, and dashpot. Please see below a visualisation of the system I wish to model. I wish to model the coupling between the mass of the LO and the plate by coupling the z-dof of each corner of the plate to the z-dof of the mass of the LO. I am familiar with how to set up the mass, spring, and dashpot of the LO and how to model the plate; however, I do not know how to set up the coupling of the z-dof of each corner of the plate to the z-dof of the LO mass.

• Ashish Khemka
Forum Moderator

Try using Remote Points. Under Details of Remote Point, you can choose the DOF to be coupled:
Regards Ashish Khemka