Synchronous wind-induced pressures, measured in wind-tunnel tests on model buildings instrumented with hundreds of pressure taps, are an invaluable resource for designing safe buildings efficiently. They enable a much more detailed, accurate representation of the forces and moments that drive engineering design than conventional tables and graphs do. However, the very large volumes of data that...

In order to maintain the cryogenic environment of wind tunnel in service, heat transfer insulation structure is investigated this work. Firstly, design and material selection conducted. Afterwards, theoretical calculation on carried out based 1-D conduction model. Subsequently, finite element model established, basis, involving actual work condition tunnel, numerically calculated. Finally, test...

The influence of foundation pit excavation on deformation and stability the supporting structure underlying adjacent existing tunnel is a comprehensive geotechnical engineering problem, including unloading effect coupling surrounding rock structure. Using numerical calculation methods, this paper changes different depths widths discusses evolution law about force structure, changing relationshi...

A train–tunnel–surrounding rock numerical model was established by using ABAQUS to analyze the dynamic response of a heavy-haul railway tunnel in hard rock, quantify influence train axle load on and determine its potential vulnerable position. The results suggested that: Under 30 t surrounding pressure coupling, maximum principal stress caused 1.27 MPa, located at bottom structure below side dr...

Abstract Wind tunnel test is a critical way to investigate flutter characteristics of aircraft, particularly in identifying the transonic dip phenomenon aeroelastic design. The continuous wind has advantages over blow-down long running time, wide bandwidth dynamic pressure, and stable flow field. Thus, more suitable for tests. Flutter techniques are studied FL-62 tunnel, first large-scale China...

Displacements around a tunnel, occurring as a result of excavation, consist of the elastic and plastic parts. In this paper, we discuss the elastic part of displacements as a result of excavation, called net displacement. In general, the previous analytical solutions presented for determining the displacements around a circular tunnel in an elastic medium do not give the net displacements...

The study of two-phase fluid flow behavior in hydraulic structures such as pressurized flow tunnels, culverts, sewer pipes, junctions and other similar conduits is of great importance. A two-phase mixture flowing in a pipe can exhibit several interfacial geometries such as bubbles, slugs or films, depending on the fluid and hydrodynamic properties of flow. The main variables, giving rise to a v...

The study of two-phase fluid flow behavior in hydraulic structures such as pressurized flow tunnels, culverts, sewer pipes, junctions and other similar conduits is of great importance. A two-phase mixture flowing in a pipe can exhibit several interfacial geometries such as bubbles, slugs or films, depending on the fluid and hydrodynamic properties of flow. The main variables, giving rise to a v...

OBJECTIVE To investigate survival and risk factors influencing intermediate outcome after the Fontan procedure. METHODS Retrospective analysis of 122 patients operated between April 1991 and September 2002. Poor outcome was defined as late death or poor functional status (intractable supraventricular arrhythmias/NYHA 3-4) necessitating revision surgery. RESULTS 64(52%) patients had an inter...