Multi-objective optimization design method for overall parameters of variable thrust solid engine

Abstract

The invention relates to the field of engine design, and discloses a variable thrust solid engine overall parameter multi-objective optimization design method, which comprises the following steps: generating uniformly distributed initial sample points in a design space based on Latin hypercube test design; calculating an engine mass ratio and a thrust regulation ratio of a design scheme corresponding to sample points based on a variable thrust engine multidisciplinary simulation model, establishing an agent model for each target function based on existing data, gradually increasing the sample points based on a sequence sampling criterion and updating the agent models until the number of times of use of a real model reaches a given maximum threshold value, and calculating the engine mass ratio and the thrust regulation ratio of the design scheme corresponding to the sample points. And more efficient and reasonable overall optimization design of the variable thrust solid engine is realized.

Description

technical field [0001] This application relates to the field of engine design, in particular to a multi-objective optimal design method for the general parameters of variable thrust solid engine. Background technique [0002] In order to meet the multi-task application requirements of missile weapon systems and adapt to the development trend of "solidification" of missile power systems, variable thrust solid motors have become one of the important research directions of missile weapon power systems because of their thrust follow-up characteristics and high energy utilization efficiency. In the design process of variable thrust solid motors, a larger thrust adjustment ratio can greatly improve the maneuverability of missiles or guided rockets, which is conducive to the application efficiency of variable thrust engines. The thrust adjustment ratio largely depends on the pressure ratio of the engine combustion chamber. Blindly pursuing a larger thrust adjustment ratio will lead...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a multi-objective optimization design method for the overall parameters of the variable thrust solid engine, aiming to solve the problem that the prior art cannot realize the overall optimization design efficiency of the thrust solid engine, and multiple objective functions cannot be considered in the design process Technical issues that restrict each other and conflict with each other

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