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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?
    The drawbridge is a routine, minimal, defense (drawn up nightly for example) intended against attack mainly to provide time to lower the inner portcullis The fortification is the headquarters of the defender's territory, such as a capital city; and or It's seen as a status symbol: "Look! a drawbridge! Aren't I just the coolest Baron, with the
  • High Quality SOLUTION A uniform drawbridge must be held at a 37 . . . - Chegg
    A uniform drawbridge must be held at a 3 7 ∘ angle above the horizontal to allow ships to pass underneath The drawbridge weighs 4 5, 0 0 0 N and is 1 4 0 m long A cable is connected 3 5 m from the hinge where the bridge pivots (measured along the bridge) and pulls horizontally on the bridge to hold it in place
  • Where is (or was) the biggest medieval drawbridge?
    The south east drawbridge is of oak, with timbers 2 9m wide and 203mm thick The north east one is similar but a little narrower They are raised every night and lowered every morning, just as they have been since 1510 So the drawbridge only reaches out 2 75m(9ft) although the moat was 18m(~60ft) wide
  • Solved 1 -12. 0 m Sir Lancelot rides slowly out of the castle - Chegg
    1 -12 0 m Sir Lancelot rides slowly out of the castle at Camelot and onto the 12 0-m-long drawbridge that passes over the moat (Fig P11 46) Unbeknownst to him, his enemies have partially severed the vertical cable holding up the front end of the bridge so that it will break under a tension of 5 80* 103 N
  • Solved The drawbridge shown consists of two identical - Chegg
    The drawbridge shown consists of two identical sections that open to allow boats to pass Write an equation you can use to find the length s (in feet ) of each section of the drawbridge There are 2 steps to solve this one
  • Solved Problem 10 (Stabilizing a drawbridge) A drawbridge is - Chegg
    The drawbridge is uniform, so its center of gravity is exactly at its (geometric) 40° center The drawbridge is being fixed by a chain attached 2 0 m from the end of the bridge At this instant shown, the drawbridge is at an angle of 30° above the horizontal 30° In this problem, give all torques relative to the point where the drawbridge is
  • 2. A truss drawbridge is pinned to its support at | Chegg. com
    - The drawbridge (line HP) currently makes an angle of θ with respect to the horizontal - Three external forces are applied: F 1 at O, F 2 at L, and F 3 at L - A counterbalance weight, W CB , is attached to point P by a cable - The length of each link is given in the table 2 A truss drawbridge is pinned to its support at point N Tt
  • Solved Problem 7 (Stabilizing a drawbridge) A drawbridge is - Chegg
    Problem 7 (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
  • Solved Part B (Figure 2)The drawbridge then starts to rise . . . - Chegg
    Part B (Figure 2)The drawbridge then starts to rise The dancer continues to stand on one leg The drawbridge stops just at the point where the dancer is on the verge of slipping What is the magnitude f of the frictional force now? Express your answer in terms of some or all of the variables n is , andort The angle θ should not appear in
  • Solved Problem 7 (Stabilizing a drawbridge) 2. 0 m A - Chegg
    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 of the bridge





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