摘要
基于集中质量块法研究了叶片相似缩尺试验模型的模态调节问题.首先根据薄板的小挠度理论假设,得出了考虑质量块分布的薄板固有频率理论计算公式,通过引入质量块位置比值坐标,重点分析了集中质量块在薄板上的位置和质量块材料对薄板振动特性的影响规律.最后通过工程实例给出基于集中质量块的具体应用方法,并用有限元法从固有频率和模态振型两方面得以验证和对照,确认了所提出的模态调节方法的正确性和有效性.
Modal adjustment method for similar test model of blade was studied on the basis of the lumped mass method. Firstly, the natural frequency formulas of thin plate with lumped mass distribution were obtained according to the small plate deflection theory assumption. Secondly, the vibration characteristics influence rules of the materials and position of the lumped mass on the thin plate were analyzed using ratio coordinate system. Finally, the application method based on lumped mass was given through a practical example, and the effectiveness and correctness of the adjustment method were verified with finite element method from natural frequency and modal shapes.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第10期1470-1473,1520,共5页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51105064)
国家重点基础研究发展计划项目(2012CB026000)
中国博士后科学基金资助项目(201004812100)
中央高校基本科研业务费专项资金资助项目(N100403007)
