Application of Continnuumnization for Predicting Dynamic Properties of Brick Mortar Systems

摘要

We developed equivalent continuum forms for brick structures based on continuumnization byrnHori et al. Approximating the discrete vector felds with Taylor series expansion, we obtained tworncontinnumnized models for predicting wave properties; the frst model is based on second orderrnapproximation, while the other uses infnite series. With numerical simulations, we demonstraternthat continuumnization can accurately predict the properties of p-, s- and rotational wavesrnmaking it good tool for verifcation of rigid body spring model (RBSM) based codes. It isrndemonstrated that the second order model can predict wave properties for a reasonably widernrange of wave numbers, while the model based on infnite series can make accurate predictionsrneven for high frequency applications. Further, a preliminary investigation is conducted on thernpossible contribution from predicted high speed spins to damping of brick mortar or granulernsystems.