Lerr is obtained through tracing the variety of elastic energy density of each element and recording the maximal fluctuation when brittle failure happens during numerical calculation 該指標的實現(xiàn)是通過在數(shù)值計算中追蹤每個單元彈性能量密度變化的全過程,記錄單元發(fā)生脆性破壞前后的彈性能密度差值,得到單位體積巖體突然釋放的彈性能量。