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前人只研究了山字型构造体系的构造应力场和主应力轨迹线,本文是在李四光教授提出的山字型构造应力场模型的基础上,利用弹性板失稳的有限元法,分析了山字型构造体系的挠度场,并进行了初步计算。从地块失稳屈曲来研究山字型构造体系的形成条件,是一新的尝试。研究结果表明,在四边固定条件下,板失稳褶皱,不能出现脊柱,要出现脊柱,必须放松脊柱后面的边界条件。这对山字型构造体系的野外研究工作,具有指导意义。
Previous studies have only studied the tectonic stress field and the principal stress trajectory of the mountain-shaped tectonic system. Based on the mountain-shaped tectonic stress field model proposed by Professor Li Siguang and using the finite element method of instability of the elastic plate, The deflection field of the mountain-shaped structure and its initial calculation. It is a new attempt to study the formation conditions of the mountain-shaped structural system from the instability and buckling of the block. The results show that, under the four-sided fixation, the plate can not buckle and appear spine. To appear the spine, the boundary condition behind the spine must be relaxed. This mountain font structure system of field research, with guiding significance.