机械原理试卷（国外英文资料）.docVIP

机械原理试卷（国外英文资料） The mechanical principle of the examination paper reference answer (№ 1) One, fill-in-the-blanks: (30 points) The speed of the moment in an organization is the coincidence point of zero (relative speed) of the two components The plane mechanism (velocity) analysis. In the following organization, if the length of the rod is given, the first group is for the longest pole (double rocker mechanism); The second group is the organ of crankshaft. b A c (1) a = 250 b = 200 c = 80 d = 100; (2) a = 90 b = 200 c = 210 d = 100. The component is (the unit of motion) and the part is (the unit of manufacture). The smaller the radius of the base circle of the CAM, the larger the size (larger) but too small the radius of the base circle Cause pressure Angle (increase). In order to make the standard gear not to be cut when the gear is being cut by using a rack cutter, The tool should be made (the top line of the tooth shall not exceed the limit mesh). When the motion of the CAM mechanism is not affected, the regulation should be chosen. The intermittent CAM mechanism is converted (the continuous rotation of the active wheel) to (the intermittent of the moving disc) The movement. 98 In the balance of the rigid rotor, the rotors mass distribution should be adopted when the mass distribution of the rotor is not in a plane (dynamic balance) method balance. The equilibrium condition for (Σ M = O; Σ F = 0). The establishment of mechanical equivalent dynamics model is the equivalent principle: equivalent components The kinetic energy should be (equal to the total kinetic energy of the whole system). Equal force, equivalent moment The amount of work done or instantaneous power should be (equal to the force of the whole system, all of the torque) The sum of the power or power produced. In the analysis of structural analysis, the structure formula of the basic rod group is (3n = 2PL). While moving In static analysis, the static condition is (3n = 2PL). Choice question: (20 point