Question

FEA ( finite element analysis )

b) Describe an example of a harmonic response finite element analysis c) Describe the difference between solid elements and shell elements. DO

Answer 1

b) Harmonic Response Finite Element Analysis

It is the linear dynamic analysis used to analyse and compute the response of a system under the excitation of varying frequencies. This is also known as Frequency Response Analysis. In this, the load applied is the steady sinusoidal load to the linear model. It is used to compute the developed stresses due to the continuous and steady operation of machines and vehicles. Common example is Study of Vehicle's crank shaft and balancing of rotor, Also used to study the cyclic loading in IC Engine.

c) Difference between Solid and Shell Elements

Shell element is most widely used for effective result. It saves lots of computation timings. Meshing of shell elements is much easier than solid elements. They are less Jacobian errors in Shell elements compare to the solid elements. A solid model is considered a huge solid element, while shells are hollow from inside. We can say that shells are the simplified model of solids.