风洞用盒式应变天平系统动态响应分析
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摘要
建立与盒式应变天平系统等效的质量-弹簧-阻尼系统理论模型,并以此理论模型为基础,对其进行系统动态响应分析。分析时,通过改变盒式应变天平系统中测量元件的刚度,得出该天平系统中不同质量块在给定的动载作用下的位移响应。计算结果表明测量元件的刚度越大,结构的响应频率越高,质量块的位移响应曲线与所加动载荷的形式越吻合。基于此结论,根据输入的载荷形式,通过调节测试元件的刚度,使计算结果能够准确地反映出载荷的真实情况,从而为基于响应曲线反推外加动载荷提供理论指导。
An equivalent theoretical model based on a mass-spring-damper system is established for the strain-gauge balance system. Based on the proposed model,the dynamical response of the balance is analyzed. The displacements of the different mass blocks of the balance under given loads are studied by altering the stiffness of the measuring elements. Numerical simulation shows that the greater the stiffness of the system,the higher is the frequency of the response of the system.Besides,the displacement curves of the mass are consistent with the type of the loads very well. By adjusting the stiffness of the measuring elements,the numerical calculations for different types of loading agree very well with the real load conditions.Therefore,the present mass-spring-damper model is expected to provide theoretical guidance to the design,fabrication and the experimental scheme of the strain-gauge balances.
An equivalent theoretical model based on a mass-spring-damper system is established for the strain-gauge balance system. Based on the proposed model,the dynamical response of the balance is analyzed. The displacements of the different mass blocks of the balance under given loads are studied by altering the stiffness of the measuring elements. Numerical simulation shows that the greater the stiffness of the system,the higher is the frequency of the response of the system.Besides,the displacement curves of the mass are consistent with the type of the loads very well. By adjusting the stiffness of the measuring elements,the numerical calculations for different types of loading agree very well with the real load conditions.Therefore,the present mass-spring-damper model is expected to provide theoretical guidance to the design,fabrication and the experimental scheme of the strain-gauge balances.
引文
[1]贺德鑫.风洞天平[M].北京:国防工业出版社,2001.(He De-xin.Wind Tunnel Balance[M].Beijing:National Defense Industry Press,2001.)
[2]朱本华.低速风洞应变天平校核系统总体方案及关键部件设计与分析[D].长沙:国防科技大学,2009.(Zhu Ben-hua.Design and analysis on general project and key parts of low-speed wind tunnel strain-gauge balance static calibration system[D].Changsha:National University of Defense Technology,2009.)
[3]姚裕,吴洪涛,张召明.并联风洞天平应用研究[J].南京航空航天大学学报,2007,39(1):549-552.(Yao Yu,Wu Hong-tao,Zhang Zhao-ming.Application of parallel wind tunnel balance[J].Journal of Nanjing University of Aeronautics and Astronautics,2007,39(1):84-87.)
[4]姚裕,张召明.整体式盒式应变天平有限元设计[J].南京航空航天大学学报,2010,42(1):58-61.(Yao Yu,Zhang Zhao-ming.Finite element design on integrated box balance[J].Journal of Nanjing University of Aeronautics and Astronautics,2010,42(1):58-61.)
[5]Arief Suhariyono,Jong Hyun Kim,Nam Seo Goo.Design of precision balance and aerodynamic characteristic measurement system for micro aerial vehicles[J].Aerospace Science and Technology,2005,10(2):92-99.
[6]解亚军,叶正寅,杨中艳.遗传优化算法在盒式应变天平设计中的应用[J].弹箭与制导学报,2011,31(1):128-130.(Xie Ya-jun,Ye Zheng-yan,Yang Zhong-yan.The application of genetic algorithm optimization to a cassette strain-gauge balance[J].Journal of Projectiles,Rockets,Missiles and Guidance,2011,31(1):128-130.)
[7]DANIEL W J T,MEE D J.Finite element modeling of a three-component force balance for hypersonic flows[J].Computers&Brurhrm,1995,54(1):35-48.
[8]解亚军,叶正寅,杨中艳.盒式应变天平优化设计与有限元分析[J].机械科学与技术,2011,30(12):1973-1976.(Xie Ya-jun,Ye Zheng-yan,Yang Zhong-yan.Optimization and finite element analysis of a cassette strain-gauge balance[J].Mechanical Science and Technology for Aerospace Engineering,2011,30(12):1973-1976.)
[9]祝小梅,蔡勇.应变天平系统动力学分析[J].机械设计与制造,2014(3):207-210.(Zhu Xiao-mei,Cai Yong.Dynamic analysis of strain balance system[J].Machinery Design and Manufacture,2014(3):207-210.)
[10]李宝,曹佳琪,袁卫锋.盒式应变天平系统理论模型研究[J].机械设计与制造,2015(4):48-51.(Li Bao,Cao Jia-qi,Yuan Wei-feng.Study on the theoretical model of strain-gauge balance system[J].Machinery Design and Manufacture,2015(4):48-51.)
[2]朱本华.低速风洞应变天平校核系统总体方案及关键部件设计与分析[D].长沙:国防科技大学,2009.(Zhu Ben-hua.Design and analysis on general project and key parts of low-speed wind tunnel strain-gauge balance static calibration system[D].Changsha:National University of Defense Technology,2009.)
[3]姚裕,吴洪涛,张召明.并联风洞天平应用研究[J].南京航空航天大学学报,2007,39(1):549-552.(Yao Yu,Wu Hong-tao,Zhang Zhao-ming.Application of parallel wind tunnel balance[J].Journal of Nanjing University of Aeronautics and Astronautics,2007,39(1):84-87.)
[4]姚裕,张召明.整体式盒式应变天平有限元设计[J].南京航空航天大学学报,2010,42(1):58-61.(Yao Yu,Zhang Zhao-ming.Finite element design on integrated box balance[J].Journal of Nanjing University of Aeronautics and Astronautics,2010,42(1):58-61.)
[5]Arief Suhariyono,Jong Hyun Kim,Nam Seo Goo.Design of precision balance and aerodynamic characteristic measurement system for micro aerial vehicles[J].Aerospace Science and Technology,2005,10(2):92-99.
[6]解亚军,叶正寅,杨中艳.遗传优化算法在盒式应变天平设计中的应用[J].弹箭与制导学报,2011,31(1):128-130.(Xie Ya-jun,Ye Zheng-yan,Yang Zhong-yan.The application of genetic algorithm optimization to a cassette strain-gauge balance[J].Journal of Projectiles,Rockets,Missiles and Guidance,2011,31(1):128-130.)
[7]DANIEL W J T,MEE D J.Finite element modeling of a three-component force balance for hypersonic flows[J].Computers&Brurhrm,1995,54(1):35-48.
[8]解亚军,叶正寅,杨中艳.盒式应变天平优化设计与有限元分析[J].机械科学与技术,2011,30(12):1973-1976.(Xie Ya-jun,Ye Zheng-yan,Yang Zhong-yan.Optimization and finite element analysis of a cassette strain-gauge balance[J].Mechanical Science and Technology for Aerospace Engineering,2011,30(12):1973-1976.)
[9]祝小梅,蔡勇.应变天平系统动力学分析[J].机械设计与制造,2014(3):207-210.(Zhu Xiao-mei,Cai Yong.Dynamic analysis of strain balance system[J].Machinery Design and Manufacture,2014(3):207-210.)
[10]李宝,曹佳琪,袁卫锋.盒式应变天平系统理论模型研究[J].机械设计与制造,2015(4):48-51.(Li Bao,Cao Jia-qi,Yuan Wei-feng.Study on the theoretical model of strain-gauge balance system[J].Machinery Design and Manufacture,2015(4):48-51.)