They throwback time to when life was arguably simpler and to days which most of us cannot remember. But these brilliant images give us a glimpse to what those years were like - it’s a whole lot ...

In total, there are 14 wave modes propagating in the box-girder below 200 Hz. The G1, A1 and D2 wave modes are the dominant wave modes generating vibration velocity peaks on the top, bottom and flange ...