Study on the coupled vibration of human body and car body system in light elastic car body

本研究的目的在于阐明加速和轻量化容易产生的车体固有振动问题，并从动力学的角度提出有效的汽车减振设计新方法。具体来说，接下来的三个项目是主要的研究目的。1)车体与人体的紧密耦合振动问题作为本文所强调的特殊振动问题，是由于现代汽车车身的轻量化设计，即车身与人体的质量比变小而引起的。2)提出了基于耦合振动问题的车身轻量化设计方法。3)为了减小车体的弹性振动，仅仅抑制通过悬架从轨道传递到车体的振动是不够的，还要抑制车体本身的弯曲振动。针对这种振动控制，阐明了利用附着在车身上的传感器和执行器进行振动控制的方法。利用国产的平顺性评价实验装置进行了试验，对车身与人体、座椅之间的耦合振动相似性进行了评价和分析。验证了人体与车身耦合系统基本评价方法的有效性。为了具体分析车身系统的垂直振动，建立了车身振动控制系统的解析模型和人体车身系统的解析模型。并利用铁道技术研究院生产的实尺寸试验车体，进行了人体与车体的耦合振动实验，对人体与车体耦合系统进行了评价。通过这些分析和实验，得到了以下新的认识。1)通过对人体振动特性的建模，证明了人体与车身之间的耦合振动可以从理论上解释。这一理论分析结果在我校的比例模型实验装置中得到了清晰的验证。2)根据铁道技术研究院一辆实尺寸试验车体的耦合振动实验结果，我校开展的实验结果与实际车辆中人体振动特性的结果较为吻合，能够阐明我校提出的人体模型的有效性。3)利用人-车身耦合振动解析模型，提出了一种受人体振动特性影响的轻型轨道车辆设计新方法，通过车身附着控制系统抑制弯曲振动（弹性振动）。计算机仿真分析表明，采用该控制系统后，阻尼性能得到了显著改善。少

The purpose of this study is to clarify the car body proper vibration problem which is easy to occur by speedup and lightening, and to propose the effective and new vehicle design method from the dynamics standpoint in the vibration suppression. Concretely, the next three items are the main research purposes.1) The close coupled vibration problem between car-body and human-body as a peculiar vibration problem emphasized here is investigated because of the light-weight design of the recent car-body which means that the mass ratio of car body to human body becomes small.2) The design method of lightweight vehicle body based on the coupled vibration problem is proposed.3) In order to reduce the elastic vibration of the car body, it is not enough to suppress the vibration that is transmitted through suspension from the track to the car body only, but also to suppress the car-body bending vibration itself. For this vibration control, the method of the vibration control is clarified by using … More the sensors and actuators attached to the car body.The experiment by riding comfort evaluation experimental set-up produced in our university was carried out, and the similarity of the coupled vibration between car-body and human-body and seat was evaluated and was analyzed. And the validity of the fundamental evaluation method of human body and car body coupled system was examined. Analytical model of the car body vibration control system and analytical model of the human body car body system were constructed in order to analyze the vertical vibration of the system concretely. And, by using real-size test car body produced in Railway Technical Res. Inst., the coupled vibration experiment of human body and car body was carried out, and human body and car body coupled system were evaluated. The following new knowledge was obtained by these analysis and experiments.1) By modeling the vibration characteristic of human body, it was shown that the coupled vibration between human body and car body can be theoretically explained. The result of this theoretical analysis was verified clearly by the scale model experimental set-up in our university.2) According to a result of coupled vibration experiment using a real-size test car body which belong to Railway Technical Res. Inst., the experimental result carried out in our university can be in accordance with the result of the human body vibration characteristic in actual vehicle, and it can clarify the effectiveness of the human body model proposed in our university.3) By using analytical model of the human and car-body coupled vibration, a new design method for light-weight railway vehicle, which is influenced by the vibration characteristic of human body, is proposed to suppress the bending vibration (elastic vibration) by car-body attached control system. By this control system, the drastic improvement in damping performance was shown by computer simulation analysis. Less