Direct approach: mechanical electrical analogy (2/2)
The construction of the network is illustrated in the following image:
 | Two non coupled masses |
Two coupled masses |  |
We can see that the topology of the electrical network is not the same as the mechanical one. This means that it is not always intuitive to go directly from the mechanical schematic to the electrical network. The risk of errors increases with the complexity of the system (increasing the degrees of freedom).
For those for which the above method does not seem practical, another approach exists: the "mobility" method.
