考虑惯性力矩与剪切变形的曲梁面内自由振动微分方程的建立

Establishment of differential equation of in-plane free vibration of curved beams under MOI and shear deformation

振动微分方程的推导与建立是结构动力分析的关键.依据Timoshenko梁理论,计入惯性力矩与剪切变形的影响,通过联立几何变形协调方程与内力平衡方程,推导建立曲梁面内横向弯曲自由振动微分方程与曲梁面内轴向自由振动微分方程.研究结果为曲梁动力学研究提供一定的理论基础.

The derivation and establishment of vibration differential equation are the key to the structural dynamic analysis.The moment of inertia(MOI)and shear deformation were taken into account,the differential equations of in-plane free vibration about lateral bending and axial deformation of curved beams were derived and established by combining geometric equations and the internal force equilibrium according to the theory of Timoshenko beam.The research results can provide a theoretical basis for dynamic study on the curved beams.