Method for evaluating binding strength of mechanical composite pipe

摘要

A method for evaluating the binding strength of a mechanical composite pipe comprises the following steps: selecting a standard mechanical composite pipe; imposing excitation on the standard mechanical composite pipe in specific manner, recording an excitation force signal, collecting acceleration signals in real time, and obtaining a modal parameter value of the standard mechanical composite pipe after analysis; imposing the same excitation on a mechanical composite pipe under test in the same manner, collecting acceleration signals at corresponding points in real time, and obtaining the same modal parameter value of the mechanical composite pipe under test after analysis; comparing the two modal parameter values; and determining, according to a comparison result, whether the binding strength of the mechanical composite pipe under test meet requirements, thereby solving the problems in the prior art that the destructive test needs to be performed, the test error is big, the cost is high, the efficiency is low, and the on-line test cannot be performed.