关于地震物理模型相似比问题

SIMILITUDE IN SEISMIC PHYSICAL MODELLING

本文从弹性波波动理论出发,较全面地推导并论述了地震物理模型实验中急待解决的相似关系问题。指出了实体和模型相似的基本关系是位移和应力的相似,从而导出了实际应用中几何尺度和动力学参数相似准则,并从模型实际应用出发引出相似比。在系统的实体与多层模型制作中,重点应考虑的是两类模型设计方法、非理想弹性介质和勘探地震物理模型参数选择及处理方法问题。

Based on the elastic wave theory, the similitude, a problem should be given atop priority, was discussed and the formulae for calculation were also d-erived. It has been pointed out that the basic relation in similarity between the material object and the model is, in essence, the similarity of displacement and s tress. For this reason, the physical parameters about similarity creterion between the geometry scale and the kinetic parameters were derived. Founded on what have been mentioned above, tne concept of similitude was thus drawn out. In model constructing, the focal points which should be taken into account may include the design of the object and the model; the non-ideal elastic medium, the selection of the parameter for modelling and the technique for processing.