Abstract There is great variation in the lithology and lamination thickness of composite roof coal-measure strata; thus, prone to delamination falling, it difficult control surrounding rock when developing roadway such strata. In deep mining, stress environment complex, mechanical response mass different from that shallow mass. For composite-roof excavated mass, key safe efficient production mi...

Based on the phenomenon of serious tensile-shear failure bolts and cables, domestic foreign scholars’ research mechanical properties cables has gradually changed from pure tensile to performance. To reduce long-term bolt cable breakage accidents in deep soft rock tunnels coal mines, we independently developed a new type support material—anchor with C-shaped tube corresponding test system. The s...

Abstract Maintenance of wind turbine towers is currently a manual process that requires visual inspection and bolt tightening yearly. This costly to energy companies its necessity not well-defined. In this study, two Rayleigh-based distributed fiber optic sensing technologies are evaluated compared for their ability monitor the dynamic structural behavior model tower subject free forced vibrati...

A method for robotized cable winding of the Uppsala University Wave Energy Converter generator stator has previously been presented and validated. The purpose of this study is to present and validate further developments to the method: automated stand-alone equipment for the preparation of the winding cables. The cable preparation consists of three parts: feeding the cable from a drum, forming ...

The cable equation describes the voltage in a straight cylindrical cable, and this model has been employed to model electrical potential in dendrites and axons. However, sometimes this equation might give incorrect predictions for some realistic geometries, in particular when the radius of the cable changes significantly. Cables with a nonconstant radius are important for some phenomena, for ex...

In this paper, a bolt feeding device and assembly system are designed manufactured. The includes: incoming parts, including material channel, which is used to accommodate bolts; the part includes silo first power part. equipped with receiving hole can be opposite channel. bolts in channel moved hole. push hole, so that head of set axial clearance. above scheme facilitate stable pickup by downst...

The nearly 21-year-old Jiujiang Bridge, which is suffering from uneven line shape, constant great downwarping of the main beam and cracking of the box girder, needs reinforcement and cable adjustment. It has undergone cable adjustment for twice with incomplete data. Therefore, the initial internal force state of the Jiujiang Bridge is identified as the key for the cable adjustment project. Base...