Integrated test device for dynamic buckling of grids under temperature field

Abstract

The invention discloses a temperature field grid shelf dynamic buckling integration test apparatus. The temperature field grid shelf dynamic buckling integration test apparatus comprises a hanger bracket, suspension connection rods, an impact hammer, a moveable temperature control box and a grid shelf mounting rack, the upper ends of two parallel suspension connection rods can be mounted at the top of the hanger bracket in a rotate mode through the connection shafts, the connection shaft corresponding to the upper end of one suspension connection rod is the angle measurement shaft, the angle measurement shaft is provided with an angle measurement encoder used for measuring the rotate angle of the corresponding suspension connection rod; the impact hammer comprises a hammer body and an impact head, the lower ends of two suspension connection rods are connected with the hammer body in a rotate mode, the grid shelf mounting rack used for mounting the grid shelf is located in the moveable temperature control box, which moves horizontally and controls the temperature, a box door is formed in the box wall of the moveable temperature control box and the impact head of the impact hammer aligns at the grid shelf mounting rack. The integration test device is specially used for executing the grid shelf dynamic buckling test and the grid shelf dynamic buckling test in two working conditions (hot state and cold state) can be achieved.

Description

Technical field [0001] The invention relates to a test device for a lattice frame of a nuclear power generation fuel assembly, in particular to an integrated test device for dynamic buckling of the lattice frame in a temperature field. Background technique [0002] Fuel assembly is a key component in nuclear power generation. The grid is an integral part of the fuel assembly and is a thin-walled frame structure supporting the fuel rods and the guide tube. [0003] The buckling test is a test used for buckling analysis that is to study the stability of a structure under a specific load and determine the critical load for structural instability. The buckling analysis includes: linear buckling and nonlinear buckling analysis. Linear buckling analysis can consider fixed preloads. Inertial release can also be used; nonlinear buckling analysis includes geometric nonlinear instability analysis, elastoplastic instability analysis, and nonlinear post-buckling analysis. [0004] Dynamic buck...

AI Technical Summary

Problems solved by technology

For grids, dynamic buckling tests are generally not done, and a few will be done, usually in the form of drop weights or Hobkinson rods, but this traditional test device cannot simultaneously achieve low-speed, high-energy and temperature environments. Dynamic buckling test, and it is impossible to complete the dynamic buckling test of the grid under two working conditions of hot state and cold state

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