有關(guān)use subgridding 的問(wèn)題

仿真設(shè)置網(wǎng)格CST小弟在剖分網(wǎng)格的時(shí)候使用了special里面的use subgridding選項(xiàng)，可是仿真時(shí)出現(xiàn)以下信息：
please note that the flexible subgridding algorithm requires some numerical overhead compared to normol PBA meshing. therefor subgridding should only be used if the number of meshsells can be reduced by a factor 3 or more. 這是什么意思，是網(wǎng)格剖分的太密了還是怎么了？我網(wǎng)格設(shè)置是5,5，應(yīng)該不會(huì)是太密的原因啊。希望有人知道的幫忙解答

When you applying subgridding, the minimum mesh step will be half as the normal mesh algorithm. Thus your excitation simulation time will be doubled. If your model is too simple to have more than 3 factor of subgridding, there won't be any benefit to apply this algorithm.
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非常感謝！