Substructure set of multi stage gear box coupling dynamic model

According to the different coordination relationship of the interface of each substructure, the connection types between the corresponding nodes can be summarized into three types: rigid connection, linear elastic connection and nonlinear connection. Before expounding the standardized assembly process, the standard matrix form of the coupled dynamic model of the whole system after assembly is given directly, as shown in the formula. The cutting part after coupling is shown in the figure.

The specific meanings of the symbols are as follows:

Where blkdiag (*) is a matlab function, which represents the block diagonal matrix.