发射筒热力耦合场下力学性能研究

Study on mechanical properties of launcher in thermal coupling field

发射筒是潜载导弹发射装置的重要组成部分,需要有足够的强度和刚度满足不同发射条件。本文结合实验数据,建立仿真模型,通过静力分析得到压力和结构载荷作用下的变形和应力分布;通过温度场分析得出筒上温度分布及温度载荷作用下应力应变情况;通过热力耦合场分析得到发射筒整体变形与应力分布。结果表明:在气压和结构载荷作用下发射筒最大变形1.5 mm,筒底应力125 MPa;温度场下温度自筒底段至筒体段阶梯分布,热应力作用下最大变形3.5 mm,最大应力317 MPa;热力耦合场下发射筒最大变形4.23 mm,最大应力384 MPa。3种工况下分析结果显示温度载荷是影响发射筒应力应变的主要因素,设计时在筒底圆弧面中心处需要加强。

Launchers are an important part of a submarine-launched missile launch device. Launchers must have enough strength and stiffness to meet different launch conditions. This article combines experimental date, ANSYSWORKBENCH software is used to establish simulation model. According to the simulation result of deformation and strength of the operating condition, we could get the deformation of the structure, the launcher are analyzed in thermal, the temperature distribution on the launcher was obtained by thermal analysis, according to the analysis of thermal coupling field, the overall deformation and stress distribution of the launcher were obtained. The simulation result shows： under the pressure and structural loads, the maximum deformation of the launcher was 1.5 mm, the stress was 125 MPa; under the action of temperature load, the deformation of the launch tube flange can reach 3.5 mm, the stress can reach 385 MPa; under the action of thermal coupling field, the maximum deformation of the launcher can reach 4.23 mm. The result of three condition analysis showed that the temperature load is the main factor affecting the stress and strain of the launcher. The center of the launcher bottom are needed to be strengthened to prevent damage.