Calculation Method of Axial Thermal Deformation for Thin-walled Circular Tube Structure

Abstract

The invention relates to a thin-walled tube structure axial thermal deformation computation method. Aiming at two different temperature field loading modes, the thin-walled tube structure axial thermal deformation is measured by utilizing a fiber grating sensor. The method mainly comprises the following steps: carrying out numerical simulation on the axial thermal deformation related feature parameters of a thin-walled tube structure by adopting a simulation method and giving a thin-walled tube structure axial thermal deformation computation method according to the simulation results; monitoring the response signal of the thermal load borne by the thin-walled tube structure by utilizing the distributed fiber grating sensor, substituting the response signal into an axial thermal deformation computation model and computing the thin-walled tube structure axial thermal deformation. The method has the beneficial effects that by collecting fiber grating central wavelength response signals of a few of discrete points, the axial thermal deformation of the thin-walled tube structure in different temperature fields is deduced with the help of the related computation model.

Description

technical field [0001] The invention belongs to the field of structural health monitoring, and specifically proposes a fast calculation method for the axial thermal deformation of a thin-walled circular tube structure under the action of different temperature fields based on a distributed optical fiber grating sensor network. Background technique [0002] In outer space, thermal loads are the main loads acting on spacecraft. In terms of structural form, large-scale space structures often adopt a structure composed of thin-walled circular tube structures. Under the action of thermal load, the temperature of the space structure changes, resulting in thermal deformation, thermal stress, thermal buckling and thermal vibration, which will cause the spacecraft to fail. In order to reveal the thermal deformation of the space structure caused by thermal loads, it is first necessary to monitor the thermal deformation of the structure under different temperature fields in real time, a...

AI Technical Summary

Problems solved by technology

In terms of structural form, large-scale space structures often adopt a structure composed of thin-walled circular tube structures. Under the action of thermal load, the temperature of the space structure changes, resulting in thermal deformation, thermal stress, thermal buckling and thermal vibration, which will cause the spacecraft to fail.

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