欠阻尼自然频率
undamped natural frequency
无阻尼自由振动
undamped free vibration
non damping free vibration
无阻尼自由振动的微分方程
differential equation of free vibration with zero damping
受损自然频率
damaged natural frequency
天线自然频率
antenna natural frequency
自然频率特性
frequency characteristics
自然频率特性系数
natural frequency characteristic coefficient
多自由度无阻尼线性振动系统
unpamping multiple degrees of freedom linear vibra
两自由度无阻尼系统
2-Dimension Undamped System