An insert (510) comprising a core (532) and one or more extensions (530) extending from the core. The insert is adapted to be inserted into a cavity of a hollow tube-shaped member (512). The hollow member can be a motorcycle handlebar or footrest. The insert can be made of metal or a polymer and can be an extrusion product.

A friction-damping energy absorber has at least one sliding post, a sliding sleeve, and two supporting boards. The at least one sliding post has two ends. Each one of the at least one sliding post is composed of multiple first material layers and multiple second material layers arranged in an alternate manner mounted. The sliding sleeve is mounted around at least one part of the at least one sliding post and is composed of at least one sliding unit. The supporting boards are respectively mounted on two ends of the at least one sliding post.

A friction-damping energy absorber has at least one sliding post, a sliding sleeve, and two supporting boards. The at least one sliding post has two ends. Each one of the at least one sliding post is composed of multiple first material layers and multiple second material layers arranged in an alternate manner mounted. The sliding sleeve is mounted around at least one part of the at least one sliding post and is composed of at least one sliding unit. The supporting boards are respectively mounted on two ends of the at least one sliding post.

A safety device for use in a fall arrest or fall safety system includes an energy absorber to absorb energy in the event of a fall or other impulse event. The energy absorber is a resilient element (such as a tolerance ring) providing an interference fit between a first component of the device and a second component of the device. In the event of a fall arrestor other impulse event, the first and second components effect movement relative to one another, the interference fit being overcome, and the resilient element/tolerance ring acting to resist the relative movement thereby absorbing energy.

Various examples are provided related to reducing global vibrations of tubular structures. In one example, a structure includes a tubular base structure extending along a longitudinal axis; a viscoelastic (VE) layer disposed on and distributed about the tubular base structure; and a constraining layer including a plurality of sections distributed about the tubular base structure and disposed on the VE layer, each section extending along the longitudinal axis of the tubular base structure and separated from an adjacent section by a longitudinal slit extending over an entire length of the section. In another example, a method includes disposing a VE layer on a tubular base structure extending along a longitudinal axis, the VE layer distributed about the tubular base structure; and disposing a constraining layer on the VE layer, the constraining layer including a plurality of sections distributed about the longitudinal axis of the tubular base structure.

The present invention relates to a body (B); at least a first piece (2) located on the body (B); at least a second piece (3) positioned opposite the first piece (2); a plurality of extensions (201) made of a flexible material, located on the first piece (2) and second piece (3), and extending from the first piece (2) to the second piece (3) and from the second piece (3) to the first piece (2).