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drawbridge    音标拼音: [dr'ɔbr,ɪdʒ]
n. 可开闭的吊桥

可开闭的吊桥

drawbridge
n 1: a bridge that can be raised to block passage or to allow
boats or ships to pass beneath it [synonym: {drawbridge}, {lift
bridge}]

Drawbridge \Draw"bridge`\, n.
A bridge of which either the whole or a part is made to be
raised up, let down, or drawn or turned aside, to admit or
hinder communication at pleasure, as before the gate of a
town or castle, or over a navigable river or canal.
[1913 Webster]

Note: The movable portion, or draw, is called, specifically,
a bascule, balance, or lifting bridge, a turning,
swivel, or swing bridge, or a rolling bridge, according
as it turns on a hinge vertically, or on a pivot
horizontally, or is pushed on rollers.
[1913 Webster]

81 Moby Thesaurus words for "drawbridge":
Bifrost, abatis, advanced work, balistraria, bank, banquette,
barbed-wire entanglement, barbican, barricade, barrier, bartizan,
bascule bridge, bastion, bateau bridge, battlement, breastwork,
bridge, bulwark, cantilever bridge, casemate, catwalk,
cheval-de-frise, circumvallation, contravallation, counterscarp,
curtain, demibastion, dike, earthwork, enclosure, entanglement,
escarp, escarpment, fence, fieldwork, floating bridge, flyover,
footbridge, fortalice, fortification, gangboard, gangplank,
gangway, glacis, lift bridge, loophole, lunette, machicolation,
mantelet, merlon, mound, outwork, overbridge, overcrossing,
overpass, palisade, parados, parapet, pontoon bridge, portcullis,
postern gate, rampart, ravelin, redan, redoubt, rope bridge,
sally port, scarp, sconce, span, stepping-stone, stepstone,
stockade, suspension bridge, swing bridge, tenaille, toll bridge,
vallation, vallum, viaduct, work


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  • How were drawbridges and portcullises used tactically?
    How were drawbridges and portcullises used tactically? I was recently asked why medieval castles would have both a drawbridge and a portcullis After giving an explanation, I realized that it was j
  • High Quality SOLUTION A uniform drawbridge must be held at a 37 . . . - Chegg
    A uniform drawbridge must be held at a 37∘ angle above the horizontal to allow ships to pass underneath The drawbridge weighs 45,000 N and is 14 0 m long
  • Solved during summer weekdays boats arrive at the inlet - Chegg
    Question: during summer weekdays boats arrive at the inlet drawbridge according to the Poisson distribution at a rate of 3 per hour In a 2 hour period, a what is the probability that no boats arrive?
  • Solved A drawbridge is being held stationary. Thisdrawbridge - Chegg
    A drawbridge is being held stationary Thisdrawbridge is 10 m long and has a mass of270 kg  It is attached at its base to a stone wallwith a hinge The drawbridge is uniform, so itscenter of gravity is exactly at its (geometric)center The drawbridge is being fixed by a chainattached 2 0 m from the end of the bridge
  • Solved Suppose the weight of the drawbridge in the figure is - Chegg
    Question: Suppose the weight of the drawbridge in the figure is supported entirely by its hinges and the opposite shore, so that its cables are slack The mass of the bridge is 2500 kg
  • Solved Problem 8 (Stabilizing a drawbridge) A drawbridge is - Chegg
    Problem 8 (Stabilizing a drawbridge) A drawbridge is being held stationary This drawbridge is 10 m long and has a mass of 270 kg It is attached at its base to a stone wall with a hinge The drawbridge is uniform, so its center of gravity is exactly at its (geometric) center The drawbridge is being fixed by a chain attached 2 0 m from the end
  • Where is (or was) the biggest medieval drawbridge?
    The purpose of the drawbridge was to deny access to the castle gate As such, spanning large distances was not usually necessary, at least by the drawbridge itself The still-operational drawbridges at Helmingham Hall are a good example: The moat is up to 18m wide by 1 8m deep
  • Solved Drawbridges, such as this one at the Tower of London . . . - Chegg
    Engineering Mechanical Engineering Mechanical Engineering questions and answers Drawbridges, such as this one at the Tower of London, are raised and lowered by cable systems Now consider the drawbridge illustrated below wherein the nearly horizontal brown door is centered along the vertical brick wall, the door- wall angle is α-80° as measured relative to the black hinge axis, the tension
  • Solved (a) Consider a drawbridge of mass M being held in - Chegg
    Science Advanced Physics Advanced Physics questions and answers (a) Consider a drawbridge of mass M being held in place by a rope (in green) that has a tension T The length of the drawbridge is L and it is at an angle θ above the horizontal The rope is at anangle φ above the horizontal Draw the FBD for the drawbridge showing all forces acting on it On your diagram
  • Solved At night while it is dark, a driver inadvertently - Chegg
    At night while it is dark, a driver inadvertently parks his car on a drawbridge Some time later, the bridge must be raised to allow a boat to pass through The coefficients of friction between the bridge and the car's tires are μs=0 840μs=0 840 and μk=0 510μk=0 510 1 At what angle will the car just start to slide? 2 If the bridge attendant sees the car suddenly start to slide and





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