大学实际力学期末试题及谜底.(国外英文资料).docVIP

大学理论力学期末试题及答案.(国外英文资料) One, drawing a picture (10 points) As shown below, the quality of A, B, and C are hinges on the quality of the bar AB and the CD. Try to draw a diagram of the bending of the bar and the bar CD. a. B C D 2, fill in the blanks (30 cents, 2 cents each) As shown below, the cube of a = 1m is affected by three concentrated forces. It will be simplified to the O point: The main vector is (,) N; The main moment is (,) N.m. 2. As shown in the figure below the plane of the body, by a handle, and the T shape rigid frame ABCD, connecting rod of DE and vertical sliding block E, horizontal, vertical AB section frame of CD, and AB =, known, DE =, rod with uniform angular velocity axial fixed axis rotation counterclockwise, uniform distribution and the size of the quality of connecting rod DE. According to the definition of five kinds of rigid body motion form, the T shape frame ABCD form of exercise, form of exercise for connecting rod DE. In graphical position instantaneous, if vertical, connecting rod DE an Angle with the frame of CD, in the instantaneous: point A of size, the speed of the acceleration of A point of size, D point of size, the speed of the speed of the connecting rod DE instantaneous center to the center of mass of the connecting rod DE which points to the distance, connecting rod DE angular velocity of size, connecting rod DE momentum of size, size of the motion of the connecting rod DE. C E B a. D (20 points) As shown in the lower left, the structure consists of A straight bar AC and A fold-bar BC, A is A fixed end, B stands for the roller pedestal, and C is the center hinge. The load is shown here. We know that F is equal to 40 kN, M is equal to 20kN dot M, and q is equal to 10kN over M, and a is equal to 4m. Try A and B binding. Four, the math (20) Institutions as shown in YouShangTu, and in A vertical line, the length of the crank A and at the end of the sleeve with A hinge connection, with uniform velocity when A crank rotates around