【摘要】 根据变截面杆纵向振动的波动方程,推导悬链形超声变幅杆的频率方程,应用有限元法对变幅杆进行模态分析,得到共振频率、横向振动频率、位移节点、放大系数等重要参数。与理论计算值比较表明,有限元法可获得很高精度。更多还原

【Abstract】 Basing on the longitudinal wave equation of a pole with varying sections,the frequency equation of a catenary pole is presented. Normal modes of the pole are analyzed utilizing finite element method.Some impor tant parameters such as resonance frequency both transversely and longitudinally ,vibration node and magnifying factor are obtained.The comparison with the resul ts in theory shows the modal analysis has obtained accurate results.更多还原