How gravity loads are applied in ANSYS

How can there be no gravitational load, this should belong.

Inertia. Partial knowledge, generally by imposing.

Acceleration. to finish, can be.

Linear. And also.

Angle. acceleration, for example.

domega,domgx,domgy,domgzmainmenu>solution>defineloads>apply>structural>inertia>angular

accel>global

It's to define.

Structure. Rotational acceleration! Hehe, like yes.

Gravity. , you can use the command.

acelmain

menu>solution>define

Come and finish!

It's important to note that gravitational acceleration in ANSYS is negative. The exact value depends on what your unit of calculation is.

If the calculation is done in mm n s, then -9800 should be filled

Khan, it's still the old interface, it's ......Let's change to the next version......The old version is really not used to ......

Methods for applying loads by deformation (displacement) in ANSYS:

Law. First, it is also the most commonly used method, which can be implemented through the functioner and loader in the main menu of ANSYS, and the whole process can be realized through the GUI, and the operation interface is concise and easy to understand, which is convenient for error checking and debugging.

Law. Second, it is implemented by the method of table parameters. The most important feature of table parameters is that it provides the function of linear interpolation by subscripts of rows, columns, and surfaces, which can be used to define boundary conditions or loads that vary with time, response spectrum curves, pressure curves, material-temperature curves, b-h curves of magnetic materials, etc. This is a very straightforward and effective method, and in terms of the essence of the method, the function file defined by the function user in the first method is eventually called in and defined as table parameters by the function loader for the user to use.

Law. 3. Use the APDL language provided by ANSYS to program the application of complex boundary conditions. This method is suitable for intermediate and advanced users, and the power of APDL can be used to achieve the application of boundary conditions that cannot be achieved by many GUI operations.

ANSYS software is a large-scale general finite element analysis (FEA) software developed by ANSYS in the United States, which is the fastest growing computer-aided engineering (CAE) software in the world, which can interface with most computer-aided design (CAD) software to achieve data sharing and exchange, such as Creo, Nastran, Alogor, I Deas, AutoCAD, etc. It is a large-scale general finite element analysis software that integrates structure, fluid, electric field, magnetic field and acoustic field analysis.

I tried it myself just now and solved it.

After selecting the node.

get,l5ncou,node,,count*get,l5nnum,node,,num,min*dim,l5sy,array,l5ncou,2*do,i,1,l5ncou

get,l5sy(i,1),node,l5nnum,loc,x*get,l5sy(i,2),node,l5nnum,locyl5nnum=ndnext(l5nnum)!Now that you know the coordinates, you can calculate the displacement yourself.

enddo

First, material properties have nothing to do with your meshing. The mesh is just a discrete process.

Second, the principle of gravity has nothing to do with the density of the mesh, the principle is the same, it is equivalent to gravity to the node.

Thirdly, the force is ultimately added to the node.

Fourth, from your question, you may be building a 3D model and then dividing. If you use 95 units to divide freely, the accuracy is okay, if you use 45 units to divide freely, because of the self-locking characteristics of the elements, the rigidity of the beam will increase, the calculation error is very large, and the denser it is possible, the more serious the distortion.

It is advisable to use beam elements, if your beam conforms to the beam in the sense of material mechanics, the accuracy will be very high. If you use a 3D model to divide the mesh, it is better to divide it with the 95-element rule, and you can also get good accuracy. The worst thing is to divide freely with 45 units, and the result is not of reference value.

The gravitational acceleration is added to the whole model, so it is not expressed on nodes or elements, but the acceleration is taken into account in the calculation. The finer the meshing, the more accurate the calculation results, this is not only the case with inertial analysis, all have a certain relationship, but if it is refined to a certain extent, the result of the calculation is almost the same, then there is no need to further fine.

It's a little different, because the mesh is different, that is, the shape and size of the elements, you can calculate the mass of the model by hand, and then compare the total mass of the elements output by ANSYS, the closer it is, the more accurate the calculation will be.