Deployable trusses that are widely applied in space missions utilize many hinged members to adapt to different geometrical shapes and work conditions. This paper presents two improved finite elements for a link and a bending beam to calculate dynamic characteristics of non-jointed and jointed trusses. First, the axial and transverse wave motion equations of a beam are used to get the shape func...

In order to quantitatively describe the energy dissipation law of jointed rock mass, we obtained cores in laboratory conditions using marble from roof and floor Jinchanghe Lead–zinc mine Baoshan. The dissipative degree stress wave mass is measured by introducing quality factor Qs parameter. Based on experimental principle Split Hopkinson Pressure rod loading device (SHPB), proposed a three-wave...

A columnar jointed rock mass is a type of with strong geometric anisotropy and high interface permeability. Its seepage characteristics pose new challenges to the construction maintenance Baihetan Hydropower Station on Jinsha River. The research object in this study (basalt) dam area Station. Similar-material model samples different column dip angles ( <math xmlns="http://www.w3.org/1998/Math/M...