运动学 绝对加速度:a 相对加速度:an 牵连加速度:a
16 绝对加速度: 相对加速度: 牵连加速度: aa ae ar
Kinematics Moving point: Al (on rod OA1) MCS: circular disk SCS: support Absolute motion: curvilinear(arc) Relative motion: curvilinear motion convected motion: rotation 0▲ Moving point: A (on disk) MCS: rod o'A SCS: support 0 Absolute motion: curvilinear(circle) Relative motion: rectilinear motion convected motion: rotation
17 Moving point:A(on disk) MCS:rod O'A SCS:support Absolute motion: curvilinear (circle) Relative motion: rectilinear motion convected motion: rotation Moving point:A1 (on rod O'A1) MCS:circular disk SCS:support Absolute motion: curvilinear (arc) Relative motion:curvilinear motion convected motion:rotation
动学 动点:A(在OA摆杆上) 动系:圆盘 静系:机架 绝对运动:曲线(圆弧) 相对运动:曲线 牵连运动:定轴转动 0▲ 动点:A(在圆盘上) 动系:OA摆杆 静系:机架 绝对运动:曲线(圆周) 0 相对运动:直线 牵连运动:定轴转动
18 动点:A(在圆盘上) 动系:O'A摆杆 静系:机架 绝对运动:曲线(圆周) 相对运动:直线 牵连运动:定轴转动 动点:A1(在O'A1 摆杆上) 动系:圆盘 静系:机架 绝对运动:曲线(圆弧) 相对运动:曲线 牵连运动:定轴转动
Kinematics B If the moving point is on the CAM Moving point: A(on rod AB) A on the cam) MCS: cam rod ABv SCS: earth ground earth ground absolute motion: rectilinear Circle (red dashed line) Relative motion: curvilinear(circle) curve(path unknown convected motion rotation Translation INote Clear state that to which object the moving point is attached. The moving point can not be A attached to the MCS. otherwise its relative motion is rest on the Mcs 0 19
19 If the moving point is on the CAM Moving point: A (on rod AB) A(on the cam) MCS:cam rod AB SCS:earth ground earth ground Absolute motion:rectilinear Circle ( red dashed line) Relative motion: curvilinear (circle) curve(path unknown convected motion: rotation Translation [Note] Clear state that to which object the moving point is attached. The moving point can not be attached to the MCS, otherwise its relative motion is rest on the MCS
运动学 B 若动点A在偏心轮上时 动点:4(在AB杆上) A(在偏心轮上) 动系:偏心轮 AB 杆 静系:地面 地面 绝对运动:直线 圆周(红色虚线) 相对运动:圆周(曲线)曲线(未知) 牵连运动:定轴转动 平动 注]要指明动点应在哪个 物体上,但不能选在 A 动系上。 0 20
20 若动点A在偏心轮上时 动点:A(在AB杆上) A(在偏心轮上) 动系:偏心轮 AB杆 静系:地面 地面 绝对运动:直线 圆周(红色虚线) 相对运动:圆周(曲线) 曲线(未知) 牵连运动:定轴转动 平动 [注] 要指明动点应在哪个 物体上, 但不能选在 动系上