弹带挤进膛线是一个复杂非线性的力学过程。膛线起始部磨损量是身管寿命评判的重要技术指标之一。为了真实地反映弹带挤进膛线过程中膛线起始部的磨损失效过程,以身管材料PCr Ni Mo钢制作销试样,以弹带材料96黄铜制作盘试样,基于MMS-1G...弹带挤进膛线是一个复杂非线性的力学过程。膛线起始部磨损量是身管寿命评判的重要技术指标之一。为了真实地反映弹带挤进膛线过程中膛线起始部的磨损失效过程,以身管材料PCr Ni Mo钢制作销试样,以弹带材料96黄铜制作盘试样,基于MMS-1G型销-盘式摩擦磨损试验机进行高温高速条件下的摩擦磨损试验,测定PCr Ni Mo钢/96黄铜摩擦副在高温、高速、干滑动条件下滑动速度和接触压力对摩擦系数和磨损率的影响。并应用扫描电子显微镜对摩擦表面进行观察,研究滑动速度和接触压力在销试样磨损失效过程中的影响过程。结果表明:滑动速度与接触压力对PCr Ni Mo钢的摩擦磨损性能有类似的影响规律,但影响程度不同,都存在敏感变化范围。展开更多
选用膛线起始部径向磨损量作为衡量身管使用寿命的判别参数,并通过试验数据进行了验证。以身管材料PCr Ni Mo钢制作销试样,以弹带材料96黄铜制作盘试样,在MMS-1G型销-盘式摩擦磨损试验机上进行摩擦磨损试验。模拟高温、高压和高速下弹...选用膛线起始部径向磨损量作为衡量身管使用寿命的判别参数,并通过试验数据进行了验证。以身管材料PCr Ni Mo钢制作销试样,以弹带材料96黄铜制作盘试样,在MMS-1G型销-盘式摩擦磨损试验机上进行摩擦磨损试验。模拟高温、高压和高速下弹带与膛线之间的磨损过程,测定不同滑动速度、接触压力和温度下PCr Ni Mo钢的磨损规律。采用经典内弹道公式计算滑动速度。建立弹带挤进膛线过程的有限元模型,选取膛线起始部不同部位的关键分析点,仿真其接触应力变化规律。在获取滑动速度和接触应力的基础上,生成膛线起始部各分析点的磨损速率和单发磨损量,为进一步预测身管寿命奠定良好的基础。展开更多
Ramming system is the key device to guarantee the firing speed of self-propelled gun. Based on traditional reliability enhancement testing method, a new kind of reliability enhancement testing simulation method of ram...Ramming system is the key device to guarantee the firing speed of self-propelled gun. Based on traditional reliability enhancement testing method, a new kind of reliability enhancement testing simulation method of ramming system is put forward firstly. In CAD software Pro/E and dynamic simulation software ADAMS, the virtual prototype of ramming system is established. In EASY5 software, the corresponding hydraulic system and control system models are built. The reliability enhancement testing virtual environment of ramming system is developed using the mechanical-electrical-hydraulic co-simulation technology. Based on the load spectra provided by virtual prototype, and the stress distribution provided by finite element analysis and material's S-N curve(S is fatigue strength, N is fatigue life), a model of fatigue enhancement coefficient is established through the failure mechanism analysis. The simulation processes and simulation results show the feasibility of reliability enhancement testing based on virtual prototype, and provide sufficient theory reference for structure improvement and optimization of ramming system.展开更多
文摘弹带挤进膛线是一个复杂非线性的力学过程。膛线起始部磨损量是身管寿命评判的重要技术指标之一。为了真实地反映弹带挤进膛线过程中膛线起始部的磨损失效过程,以身管材料PCr Ni Mo钢制作销试样,以弹带材料96黄铜制作盘试样,基于MMS-1G型销-盘式摩擦磨损试验机进行高温高速条件下的摩擦磨损试验,测定PCr Ni Mo钢/96黄铜摩擦副在高温、高速、干滑动条件下滑动速度和接触压力对摩擦系数和磨损率的影响。并应用扫描电子显微镜对摩擦表面进行观察,研究滑动速度和接触压力在销试样磨损失效过程中的影响过程。结果表明:滑动速度与接触压力对PCr Ni Mo钢的摩擦磨损性能有类似的影响规律,但影响程度不同,都存在敏感变化范围。
文摘选用膛线起始部径向磨损量作为衡量身管使用寿命的判别参数,并通过试验数据进行了验证。以身管材料PCr Ni Mo钢制作销试样,以弹带材料96黄铜制作盘试样,在MMS-1G型销-盘式摩擦磨损试验机上进行摩擦磨损试验。模拟高温、高压和高速下弹带与膛线之间的磨损过程,测定不同滑动速度、接触压力和温度下PCr Ni Mo钢的磨损规律。采用经典内弹道公式计算滑动速度。建立弹带挤进膛线过程的有限元模型,选取膛线起始部不同部位的关键分析点,仿真其接触应力变化规律。在获取滑动速度和接触应力的基础上,生成膛线起始部各分析点的磨损速率和单发磨损量,为进一步预测身管寿命奠定良好的基础。
基金the National Natural Science Foundation of China(No.51175508)
文摘Ramming system is the key device to guarantee the firing speed of self-propelled gun. Based on traditional reliability enhancement testing method, a new kind of reliability enhancement testing simulation method of ramming system is put forward firstly. In CAD software Pro/E and dynamic simulation software ADAMS, the virtual prototype of ramming system is established. In EASY5 software, the corresponding hydraulic system and control system models are built. The reliability enhancement testing virtual environment of ramming system is developed using the mechanical-electrical-hydraulic co-simulation technology. Based on the load spectra provided by virtual prototype, and the stress distribution provided by finite element analysis and material's S-N curve(S is fatigue strength, N is fatigue life), a model of fatigue enhancement coefficient is established through the failure mechanism analysis. The simulation processes and simulation results show the feasibility of reliability enhancement testing based on virtual prototype, and provide sufficient theory reference for structure improvement and optimization of ramming system.
