Fluid-solid coupling dynamics simulation method for single-side pull launch system

Abstract

The invention provides a fluid-solid coupling dynamics simulation method for a single-side pull launch system, comprising the following steps: Step 1: Construct a launch aerodynamic model of the single-side pull launch system; Step 2: Build a single-side pull launch system The multi-body dynamics model of the system; Step 3: Based on the launch gas dynamics model and the multi-body dynamics model, construct a fluid-structure coupling simulation model of the single-side pulling launch system; Step 4: Call the launch gas dynamics A model and a multi-body dynamics model, performing fluid-solid coupling simulation based on the fluid-solid coupling simulation model, and obtaining simulation calculation results. Wherein, step 1, step 2, step 3, and step 4 are executed in sequence, or step 2, step 1, step 3, and step 4 are executed in sequence. The invention realizes the strong coupling of the gas force of the single-side pulling launch system and the attitude of the projectile body, realizes the strong fluid-solid coupling simulation, and greatly improves the accuracy of the cylinder shell separation simulation of the single-side pull launch system.

Description

technical field [0001] The invention relates to the field of aerospace, in particular to a fluid-solid coupling dynamics simulation method for a single-side pulling launching system. Background technique [0002] The single-side pull launch technology has the advantages of fast response, high launch rate, compact structure, small footprint, and large ammunition load, so it is gradually being applied to domestic and foreign tactical missile models. The single-side pull launch system exhausts the gas generated by ejection by opening exhaust holes on the piston barrel and guide rail. During the one-sided launch of the missile, the gas will flow directly into the launch tube through the exhaust hole of the piston cylinder, the exhaust hole of the guide rail, and the gap between the guide rail and the piston cylinder, eliminating the need for a special gas exhaust structure. However, when this gas discharge method is adopted, the gas directly acts on the ejected missile body thr...

AI Technical Summary

Problems solved by technology

[0005] At present, there are two main research methods for fluid-solid interaction. One is to calculate the six-degree-of-freedom equation of the projectile coupled with computational fluid mechanics. This method cannot consider the impact of the collision force between the missile slider and the guide rail on the attitude of the projectile; the other One is to import the calculation results of computational fluid dynamics into the multi-body dynamics model to realize weak fluid-solid coupling simulation. This method cannot consider the influence of the attitude change of the projectile on the gas force

In the process of single-side pulling launch, the contact force and gas force have an important influence on the exit attitude of the projectile during the separation process of the projectile, so the simulation accuracy of the above two methods cannot meet the requirements

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