Non-classically damped systems are rife in reality but they currently cause a good deal of consternation in component mode analysis. Apart from requiring a larger amount of preparatory computation to find the modes, modal representations of non-classically damped (sub-) structures require around twice as much memory as the those for classically-damped structures and calculations of the response of a (sub-)structure receptance involves twice as many operations. A recent paper [1] shows that for any non-classically damped system, there must be a certain relationship between the real and imaginary parts of the complex modes. This paper shows how this relationship can be used to advantage in compressing the amount of storage required for modal representation of a non-classically damped (sub-)structure by 25%.
展开▼
