2results about How to "Does not affect the force" patented technology

The invention provides a shield tunnel internal structure construction simulation method and system based on a tracking unit method, and relates to the technical field of shield tunnel simulation, the method comprises the following steps: establishing a numerical calculation model of a shield tunnel and an internal structure thereof, the numerical calculation model comprising a segment ring unit and an internal structure unit; copying nodes of the internal structure unit based on a tracking unit method to generate a tracking unit; the tracking unit and the internal structure unit share nodes, and the tracking unit keeps preset rigidity; the internal structure unit is removed in the water and soil load applying stage, and the tracking unit deforms along with the segment ring unit; in the construction stage of the internal structure, the internal structure unit is activated without initial strain, the activated internal structure unit is fully attached to the deformed segmental lining, the construction process of the internal structure in the actual construction process can be truly and accurately simulated, and the stress and deformation conditions of the shield tunnel and the internal structure are truly reflected.

This utility model discloses a thrust device for a die-casting machine, including a base, a first connecting rod group, a thrust seat, and a second connecting rod group. The first connecting rod group consists of two symmetrically distributed members, rotatably connected to the base. The thrust seat is mounted on the base and can move axially relative to the base. The second connecting rod group consists of two symmetrically distributed members, each rotatably connected to both the first connecting rod group and the thrust seat. The second connecting rod group includes two first connecting rods and a second connecting rod disposed between the two first connecting rods, the thickness of the second connecting rod being greater than that of the first connecting rod. The base has two spaced-apart supports, each support having a guide post. The thrust seat has guide holes at both ends along its length that fit around the guide posts. Compared with the prior art, this utility model has good stability and is lightweight.