边界荷载位移反分析确定法

ISOSTATIC ANOMALIES AND UPLIFT IN THE HIMALAYAS

根据有限元法推导了由位移观测值反演确定边界荷载的反分析数学模型。３个算例的分析结果表明，良好的位移观测量可获得准确和稳定的荷载反分析值。

The isostatic anomalies and the gravity effect under the horizontal compression of Eurasian plate in the Himalayas are analyzed using the gravity data, and the field source of positive isostatic anomaly zone in the Himalaya ridge is studied at an angle of anomaly mantle, thus some new opinions are obtained as follows:(1)The action of the horizontal compression has a little effect on isostasy in the Himalayas. (2)The field source under the Moho interface could be inferred as a mantle body with the high temperature material, which likes a horizontal cylinder. (3)Acoording to the hot anomaly mantle and its model, the relative height 2.5km and raising velocity 5.2 mm/a of the Himalayas are evaluated.