Within 30 Hz, the discomfort caused by whole-body vibration in rotational direction is higher than vertical vibration at similar equivalent magnitude. Roll vibration, in particular, produces greater discomfort comparing with pitch and yaw vibrations. It is critical to understand the biodynamic characteristics of seated human body under roll vibration for both comfort assessment and vibration control. Experiments are carried out to obtain the biodynamic response of seated human body under random roll vibrations at four r.m.s. magnitude levels. It is found that the principal resonance in the roll apparent inertia is about 1 Hz, but varied from 0.7 to 1.5 Hz depending on the magnitude of vibration (0.5 to 2.0 rad/s²), and the secondary resonance locates around 3 Hz with a much lower modulus. It is noted that the human response to roll vibration has some features in common with that in the lateral direction. Two lumped parameter models are developed and calibrated to study the correlation between the two excitation axials. The equivalent relationships of magnitude and phase between roll and lateral vibrations are obtained on condition that they produce similar rotational responses of the upper human body. It suggests an equivalence approach between translational and rotational vibrations that can benefit the comfort assessment when exposed to multiaxial excitations.

中文翻译：

---

坐姿人体对侧倾振动的生物动力响应以及侧倾和侧向之间的相关性

在30 Hz以内，由人体在旋转方向上的振动引起的不适感在相似的等效量级上高于垂直振动。与俯仰和偏航振动相比，滚动振动尤其会产生更大的不适感。对于舒适度评估和振动控制来说，了解坐姿人体在侧倾振动下的生物动力学特性至关重要。进行实验以获得在4 rms量级的随机侧倾振动下就座人体的生物动力响应。已经发现，侧倾视在惯性中的主共振约为1 Hz，但根据振动的大小（0.5至2.0 rad / s ²），次级谐振位于3 Hz左右，模量低得多。注意，人类对侧倾振动的响应具有与横向方向相同的一些特征。开发并校准了两个集总参数模型，以研究两个激励轴之间的相关性。在横摇和侧向振动产生与上半身相似的旋转响应的条件下，可以得到幅值和相位的等效关系。它提出了一种平移振动和旋转振动之间的等效方法，当暴露于多轴激励时可以有益于舒适度评估。