全身振动 根据力学观点,人体可以看作是由若干质量、弹性元件和阻尼元件构成的机械系统。在低频和低振动级时,可粗略近似为线性集总参数系统,其力学模型如图1所示。试验表明,当人体受到垂向振动与冲击作用时,首先要考虑的是其中“胸-腹”系统。该系统在3～6赫范围发生明显共振( Whole Body Vibration According to mechanics, the human body can be regarded as a mechanical system consisting of several masses, elastic elements and damping elements. In the low frequency and low vibration level, it can roughly approximate the linear lumped parameter system, the mechanical model shown in Figure 1. Experiments show that when the human body is subjected to vertical vibration and shock, the first thing to consider is the “chest-abdomen” system. The system resonates clearly in the 3 to 6 Hz range