Mechanics Applied to EngineeringLongmans, Green and Company, 1904 - 770 страници |
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Страница 117
... heads as shown . Transfer these arrows to the bars themselves at the joint in question ; then , if an arrow points ... heads transferred to the structure . But arrow - heads must not be put on the reciprocal diagram ; if they are they ...
... heads as shown . Transfer these arrows to the bars themselves at the joint in question ; then , if an arrow points ... heads transferred to the structure . But arrow - heads must not be put on the reciprocal diagram ; if they are they ...
Страница 118
... heads on each side . At some joints , where there are no external forces , the direction of the arrows will not be evident at first ; they must not be taken from other polygons , but from the arrow - heads on the structure itself at the ...
... heads on each side . At some joints , where there are no external forces , the direction of the arrows will not be evident at first ; they must not be taken from other polygons , but from the arrow - heads on the structure itself at the ...
Страница 120
... heads , links , etc. , such motion is known as plane motion . In plane motion a body may have either a motion of translation in any direction in a given plane or a motion of rotation about an axis . Screw Motion . - When a body has both ...
... heads , links , etc. , such motion is known as plane motion . In plane motion a body may have either a motion of translation in any direction in a given plane or a motion of rotation about an axis . Screw Motion . - When a body has both ...
Страница 133
... velocity of the cross - head at any instant is readily found by means of the principles laid down above . We have shown that- velocity P velocity X = Obd.P Obd.X From O draw a line parallel to the connecting - Mechanisms . 133.
... velocity of the cross - head at any instant is readily found by means of the principles laid down above . We have shown that- velocity P velocity X = Obd.P Obd.X From O draw a line parallel to the connecting - Mechanisms . 133.
Страница 134
... head But the velocity of the crank - pin may be taken to be constant . Let it be represented by the radius of the crank - circle OP ; then to the same scale Pe represents the velocity of the cross- head . Set up fg = Pe at several ...
... head But the velocity of the crank - pin may be taken to be constant . Let it be represented by the radius of the crank - circle OP ; then to the same scale Pe represents the velocity of the cross- head . Set up fg = Pe at several ...
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acceleration angle angular velocity balance weight balls beam bearing bending bending moment bending-moment diagram body Calculate cent centre of gravity centrifugal circle coefficient compression connecting-rod constant crank Crown 8vo curve cylinder deflection diameter direction distance efficiency elastic limit ELEMENTARY energy engine equal feet per second Find flange flywheel force acting given governor hence horizontal Illustrations increase inertia length load material maximum mechanism metal method moment of inertia neutral axis orifice parallel pipe piston plane plate polygon pressure pulley pump R₁ radius of gyration ratio revolutions per minute rivets rotation shaft shear shear stress shown in Fig side speed square inch strain stress stroke strut surface tangent tensile tensile stress tension tons per square triangle turbine V₁ valve vanes varies vertical virtual centre W₁ Watt governor wheel Young's modulus
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