Multi-scale heat-proof optimization method for composite material

Abstract

The invention provides a multi-scale heat-proof optimization method for a composite material. The multi-scale heat-proof optimization method comprises the following steps: step 1, establishing finite element models of the composite material to be optimized according to design variables, wherein the finite element models comprise a mesoscopic finite element heat transfer analysis model, a macroscopic finite element heat transfer analysis model and a cell body expansion model; step 2, performing mesoscopic heat transfer analysis on the established mesoscopic finite element heat transfer analysis model to obtain equivalent thermophysical parameters; transmitting equivalent thermophysical property parameters obtained through mesoscopic heat transfer analysis into a macroscopic finite element heat transfer analysis model through a cell body expansion model for macroscopic heat transfer analysis; in the heat transfer analysis, optimizing the mesoscopic heat transfer analysis model and the macroscopic heat transfer analysis model by adjusting design variables, ending the optimization if the optimized target meets constraint conditions, and outputting a heat transfer analysis result; and if the constraint condition is not met, readjusting the design variable of the finite element model, and repeatedly iterating until a heat transfer analysis result is output. By adopting the scheme of the invention, the optimization algorithm and the grid free deformation technology can be introduced while the temperature is reduced more effectively, so that the calculation efficiency is effectively improved.

Description

technical field [0001] The invention relates to the field of thermal science, in particular to a multi-scale heat-resistant optimization method for composite materials. Background technique [0002] Composite materials are considered to be the most promising high-temperature materials in the field of aerospace, and have been widely used in various parts of aircraft. However, continuous heating of the environment for a long time will cause the composite material / structure to face thermal safety hazards, and it is difficult to ensure the safety and reliability of working in extreme environments. At present, structural heat protection can be achieved through structural design to absorb or dissipate heat, and at the same time adjust the physical parameters, geometric dimensions, installation positions, etc. of materials to achieve the optimization of composite material structure heat protection. However, most current heat protection optimization methods only consider the macros...

AI Technical Summary

Problems solved by technology

However, most of the current heat protection optimization methods only consider the macroscopic size, and do not consider the collaborative design concept based on the multi-scale design of materials (microscopic to macroscopic and then to the structure). It is difficult to adapt to the increasingly complex extreme working conditions.

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