The high natural frequencies of symmetrical section beam with different constraints are calculated in detail, and effects of rotary inertia and shearing deformation are given.
计算了对称截面粱在不同边界条件下的高阶固有频率，讨论了转动惯量及剪切变形效应对各阶固有频率的影响。
Conditions by which a circular symmetrical focussed spot can be obtained when the incident laser beam is an elliptical Gaussian profile are determined.
确定了当入射光场为椭圆高斯分布时，获得圆对称聚焦光斑的条件。
The natural frequencies of symmetrical section and non-symmetrical section continuous-beam are calculated in detail, and results of continuous-beam with different constraint conditions are given.
分别计算了对称截面及非对称截面多跨连续梁，当相邻跨按对称振型振动时的固有频率，讨论了不同边界条件对固有频率的影响。
应用推荐