基于弧长法对柔性接头高压下屈曲响应研究
|
摘要
高压下柔性接头摆动力矩减小的原因一直未得到确切解答,只归结到剪应力分布的变化很难让人信服。通过对柔性喷管中柔性接头结构形式的特点进行分析,认为随压强升高摆动力矩减小的根本原因为柔性接头的屈曲响应。分析了弧长法的原理以及其在屈曲分析中的应用,通过数值计算软件ABAQUS开展对柔性接头屈曲过程的仿真分析。分别通过通用静力算法和弧长算法对不同预摆角下承压过程进行模拟,得到摆角随压强的变化规律。计算结果表明:不同压力下的弹性力矩与实验结果对比,一致性较好,所用方法和结论可以为柔性接头高压工作环境下的设计提供有益参考。
The mechanism of the deflection torque of the flexible joint decrease with enhancing pressure has never been resolved. Just say the shear stress has changed can not be convincing. The structure of the flexible joint are analyzed, the real reason for the deflection torque of the flexible joint decrease is that it would be buckling when it bearing the deflection and pressure at the same time. The risks method is analyzed and used in this paper, the buckling process of the flexible joint is simulated by ABAQUS. The risks method and static general method are used to simulate the different processes of different pre-angle with enhancing pressure, the rules of pendulum angle changing with the enhancing pressure are got. The spring torque is got and had a good coherence with the test results. The method and conclusion in this paper will provide the beneficial reference for the design of the flexible joint in high-pressure work environment.
The mechanism of the deflection torque of the flexible joint decrease with enhancing pressure has never been resolved. Just say the shear stress has changed can not be convincing. The structure of the flexible joint are analyzed, the real reason for the deflection torque of the flexible joint decrease is that it would be buckling when it bearing the deflection and pressure at the same time. The risks method is analyzed and used in this paper, the buckling process of the flexible joint is simulated by ABAQUS. The risks method and static general method are used to simulate the different processes of different pre-angle with enhancing pressure, the rules of pendulum angle changing with the enhancing pressure are got. The spring torque is got and had a good coherence with the test results. The method and conclusion in this paper will provide the beneficial reference for the design of the flexible joint in high-pressure work environment.
引文
[1]陈汝训,刘铭初,李志明,等.固体火箭发动机设计与研究[M].北京:中国宇航出版社,2007.
[2]王春光,史宏斌,王雪坤,等.高压下喷管柔性接头摆动力矩数值分析[J].推进技术,2011,32(2):202-206.
[3]张晓光,刘宇,任军学,等.小型柔性接头推力矢量性能试验[J].航空动力学报,2012,27(12):2836-2840.
[4]王超,任军学,郝文强,等.柔性接头有效摆心漂移特性[J].航空动力学报,2014,29(12):2993-2996.
[5]史宏斌,等.控制力作用柔性喷管动力响应研究[J].航空动力学报,2003,18(4):563-568.
[6]Shani S,Putter S,Peretz A.Development of a high-performance flexible for thrust vector control[R].AIAA95-3047,1995.
[7]Donat J R.Solid rocket motor nozzle flexseal design sensitivity[R].AIAA93-1122,1993.
[8]安春利,常新龙.柔性接头弹性件超弹性本构参数拟合和低压摆动非线性有限元分析[J].固体火箭技术,2008,31(1):79-85.
[9]曹翠微,陈伟民.固体火箭发动机柔性接头的结构分析[J].推进技术,2006,27(5):450-454.
[10]曹翠微,陈伟民,蔡体敏.固体火箭发动机柔性接头弹性件力学性能研究[J].宇航材料与工艺,2005,35(5):36-41.
[11]王雪坤,王春光,史宏斌.柔性接头弹性件压缩剪切联合加载试验研究及数值分析[J].固体火箭技术,2011,(34)3:364-368.
[12]王春光,田维平,史宏斌,等.弹性件剪切模量随压力变化的试验分析[J].宇航材料工艺,2011,41(5):81-86.
[13]韩强.弹塑性系统的动力屈曲和分叉[M].北京:科学出版社,2000.
[14]Alfano G,Crisfield M A.Solution strategies for the delamination analysis based on a combination of local control arc-length and line searches[C].Sydney:International of Journal Numerical Methods in Engineering,2003.
[15]Souza D E,Neto E A,Feng Y T.On the determination of the path direction for arc-length methods in the presence of bifurcations and snapbacks[J].Computer Methods in Applied Mechanics and Engineering,1990,179(1-2):81-89.
[16]刘文光.橡胶隔震支座力学性能及隔震结构地震反应分析研究[D].北京:北京工业大学,2003.
[2]王春光,史宏斌,王雪坤,等.高压下喷管柔性接头摆动力矩数值分析[J].推进技术,2011,32(2):202-206.
[3]张晓光,刘宇,任军学,等.小型柔性接头推力矢量性能试验[J].航空动力学报,2012,27(12):2836-2840.
[4]王超,任军学,郝文强,等.柔性接头有效摆心漂移特性[J].航空动力学报,2014,29(12):2993-2996.
[5]史宏斌,等.控制力作用柔性喷管动力响应研究[J].航空动力学报,2003,18(4):563-568.
[6]Shani S,Putter S,Peretz A.Development of a high-performance flexible for thrust vector control[R].AIAA95-3047,1995.
[7]Donat J R.Solid rocket motor nozzle flexseal design sensitivity[R].AIAA93-1122,1993.
[8]安春利,常新龙.柔性接头弹性件超弹性本构参数拟合和低压摆动非线性有限元分析[J].固体火箭技术,2008,31(1):79-85.
[9]曹翠微,陈伟民.固体火箭发动机柔性接头的结构分析[J].推进技术,2006,27(5):450-454.
[10]曹翠微,陈伟民,蔡体敏.固体火箭发动机柔性接头弹性件力学性能研究[J].宇航材料与工艺,2005,35(5):36-41.
[11]王雪坤,王春光,史宏斌.柔性接头弹性件压缩剪切联合加载试验研究及数值分析[J].固体火箭技术,2011,(34)3:364-368.
[12]王春光,田维平,史宏斌,等.弹性件剪切模量随压力变化的试验分析[J].宇航材料工艺,2011,41(5):81-86.
[13]韩强.弹塑性系统的动力屈曲和分叉[M].北京:科学出版社,2000.
[14]Alfano G,Crisfield M A.Solution strategies for the delamination analysis based on a combination of local control arc-length and line searches[C].Sydney:International of Journal Numerical Methods in Engineering,2003.
[15]Souza D E,Neto E A,Feng Y T.On the determination of the path direction for arc-length methods in the presence of bifurcations and snapbacks[J].Computer Methods in Applied Mechanics and Engineering,1990,179(1-2):81-89.
[16]刘文光.橡胶隔震支座力学性能及隔震结构地震反应分析研究[D].北京:北京工业大学,2003.