Rocket engine cold swinging digital test method

Abstract

The invention provides a rocket engine cold swinging digital test method comprising the steps that S1, simulation environment initialization parameters are set; S2, a movement mechanism model including a real movement mechanism and state is constructed on the basis of an engine three-dimensional model, and a rocket engine and a servo mechanism are installed in software; S3, the movement equation of the movement mechanism of the rocket engine is defined; and S4, operation of a cold swinging digital test is started according to the movement equation of the engine movement mechanism, and dynamic interference inspection is performed. The complete set of method and technology are complete, the steps are reasonable, operation is standard and items are comprehensive, and rationality of a related structural design scheme is verified in the early design so that the forecast effect of simulation to the object test is fully reflected.

Description

Technical field [0001] The invention relates to the rocket engine test field, in particular to a rocket engine cold pendulum digital test method. Background technique [0002] The aerospace model rocket engine has a complex structure and requires a large number of ground tests. The cold pendulum test of the engine is an important part of structural coordination and must be resolved as early as possible in the development cycle. [0003] At present, the cold pendulum test in the prior art is mainly based on the ground test of the finished product, and there is no necessary means to test at the early stage of engine design to check whether the pipeline, nozzle, main structure, etc. interfere during the engine cold pendulum process, so as to correct the design early Program. At the same time, the existing technology also lacks effective grounding and evaluation of the limit state that cannot be simulated by ground tests. Summary of the invention [0004] The technical problem to be s...

AI Technical Summary

Problems solved by technology

[0003] At present, the cold swing test of the existing technology is mainly based on the ground test of the finished product, and there is no necessary means to carry out the test in the early stage of engine design to check whether the pipeline, nozzle, main structure, etc. interfere during the engine cold swing process, so as to correct the design early Program

At the same time, the existing technology lacks effective investigation and evaluation of limit states that cannot be simulated by ground tests

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