Know how to calculate force by couple moment

1.

In theoretical mechanics, Q stands for the action density of uniform load, which means the uniform load within the action range. The calculation method is as follows:

1. The uniform load can be equivalent to the force by integral method, and its size is equal to the area of uniform load, and the action point falls at 1 / 3 of the length near the bottom according to the moment equivalent method

2.

Calculation of "couple distance": vector method, M = R F, where R is the position vector from any point of one force to any point of another force. The combination of couple moments can be obtained from the sum of vectors in the couple system

Basic meaning: couple is two equal parallel forces whose resultant moment is equal to the proct of the distance between one of the parallel forces and the parallel force (called couple arm); Couple moment;, The moment of couple has nothing to do with the position of rotation axis

working characteristics:

1. The resultant force of the couple at any point on the action surface of the couple is zero; Therefore, it will not change the translational state of the object, only the rotational state of the object

Usually, the couple can only be balanced by the couple; But in fixed axis rotation, it can be balanced by circular force (i.e. torque)

Keeping the moment and turning direction of the couple unchanged, changing the force in the couple and the length of the arm of the couple will not change its effect on the rigid body

The space resultant force couple moment is the vector sum of each couple moment; The plane resultant couple moment is equal to the algebraic sum of the component couple moments

The moment of couple is proced by the forces on two different action lines. The two forces are equal in magnitude and opposite in direction, and the moment of couple will proce pure rotation effect

The moment of couple is a free vector, so it will proce the same effect wherever it acts on the object

Property introction:

the unit of couple moment is the same as that of moment; cattle × M (kg) × M / s) & quot; It means that the moment of couple is a vector, and the relationship between its direction and the direction of the two forces that make up the couple follows the right-hand spiral rule. For the object with fixed axis, under the action of couple, the object will rotate around the fixed axis; If there is no fixed axis, the object will rotate around the axis passing through the center of mass under the action of couple

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3. Walk about 50 meters, and transfer to Metro Line 1
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5. Bus route: Metro Line 3 → Metro Line 1, the whole journey is about 23.2km
1. Take Metro Line 3 from Shiqiao, pass 9 stops, and reach TIYU West Road Station
2. Take Metro Line 1, pass 1 stop, and reach the sports center station
3. Walk about 170m, and reach Zhengjia square network map
< p class = "f-aid" style = "margin: Auto;" > This data comes from the network map, and the final result is subject to the latest data of the network map

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10. Fill in the GPGPUs per machine on the fluent startup page according to your own configuration. After opening it, you can check whether your previous settings are recognized correctly in the report system GPU information, and then use the coupled algorithm to calculate. AMG on GPGPU will be displayed when calculating

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