Force superposition
Publish: 2021-04-08 18:44:28
1. Buy a card from China travel.
2. It's the same as what we learned
3. For example, 15% of each of the two Kongming's magic releases in the no pass period are calculated as 30%, and the superposition of two different 15% buffs is 1.15 * 1.15 instead of 1 + (0.15 * 0.15).
4. The water supply pressure is 0.36mpa plus 0.34mpa to meet the height of the building, and then add the resistance of the system. In this way, the pump selection can meet the operation of the system, but you also need to consider how to safely rece the pressure after the water is supplied. This is also a very technical matter in the heating system. Remember, the pressure rection must be careful. If you still can't understand it, I suggest you look at the principle of the water pressure diagram, and you will understand it.
5. Aluminum alloy is formed by heating and melting other metals, and aluminum has the highest proportion in the alloy. The most common and widely used specifications are 6061 and 7075
the shear force of 6065 aluminum alloy is 10ksi; The shear force of aluminum alloy 7075 is 22ksi
the shear force of aluminum alloy is used to measure the impact force that aluminum alloy can bear from the side. For example, the most widely used part of the remote control vehicle is the swing arm bolt. The higher the shear force is used, the greater the side impact force it can bear, and it is not easy to bend and deform.
the shear force of 6065 aluminum alloy is 10ksi; The shear force of aluminum alloy 7075 is 22ksi
the shear force of aluminum alloy is used to measure the impact force that aluminum alloy can bear from the side. For example, the most widely used part of the remote control vehicle is the swing arm bolt. The higher the shear force is used, the greater the side impact force it can bear, and it is not easy to bend and deform.
6. Hello, is that right
mid span load
superposition method: first, consider the bending moment of the left p to the mid span, because there is no given bearing number, I temporarily call the left bearing RA, and the right bearing RB
(1) first calculate the bearing reaction RA = P (2 / 3L) &# 178 1+2/3)/L² RB=P1/3L² 1+1/3)/L² Then Ma = - P (L / 3) (2L / 3) &# 178 can be obtained/ L² MB=-P(L/3)²( 2L/3)/L² < (2) calculate the left p-to-mid-span bending moment M1 = ma + ral / 2-P (L / 2-L / 3)
(3) also calculate the right p-to-mid-span bending moment M2
(4) add M1 + m2, then M = M1 + M2 = PL / 9
this is the idea, the process is too complex, I will not repeat it here
statics manual gives a formula for calculating the bending moment of two symmetrical point loads consolidated at both ends
m = PA & # 178/ L A is the distance from the point load to the fixed end, which is L / 3
I hope it is helpful for you
mid span load
superposition method: first, consider the bending moment of the left p to the mid span, because there is no given bearing number, I temporarily call the left bearing RA, and the right bearing RB
(1) first calculate the bearing reaction RA = P (2 / 3L) &# 178 1+2/3)/L² RB=P1/3L² 1+1/3)/L² Then Ma = - P (L / 3) (2L / 3) &# 178 can be obtained/ L² MB=-P(L/3)²( 2L/3)/L² < (2) calculate the left p-to-mid-span bending moment M1 = ma + ral / 2-P (L / 2-L / 3)
(3) also calculate the right p-to-mid-span bending moment M2
(4) add M1 + m2, then M = M1 + M2 = PL / 9
this is the idea, the process is too complex, I will not repeat it here
statics manual gives a formula for calculating the bending moment of two symmetrical point loads consolidated at both ends
m = PA & # 178/ L A is the distance from the point load to the fixed end, which is L / 3
I hope it is helpful for you
7.
For this kind of simple statically determinate structure, under the action of simple load, the solution usually directly superimposes the effects of these two loads. It is unnecessary to draw the effect graph separately and then superimpose the graph
calculation process: first, the reaction force of the support is calculated by using the two of the three static equilibrium formulas, ∑ y = 0, ∑ Mo = 0; Then, the internal force of the key section is obtained by the formula ∑ y = 0 and ∑ Mo = 0, and the line drawing is made according to the law of load properties
8. In theory, all cases should be solved by relativity
the reason why classical mechanics is used to solve the problem when the speed is far lower than the speed of light is that when the speed is far lower than the speed of light, the error of classical mechanics is not very large, but classical mechanics is very convenient.
the reason why classical mechanics is used to solve the problem when the speed is far lower than the speed of light is that when the speed is far lower than the speed of light, the error of classical mechanics is not very large, but classical mechanics is very convenient.
9. Put the static analysis step after initial
10. It's not as the title says,
in short,
quantum computer is to replace the original ordinary bits with quantum bits
from the physical level, quantum computers are not based on ordinary transistors, but use spin direction controlled particles (such as proton nuclear magnetic resonance) or polarization direction controlled photons (mostly used in school experiments) as carriers. Of course, in theory, any multi-level system can be used as the carrier of qubits
from the perspective of calculation principle, the input state of quantum computer can be either discrete eigenstate (like traditional computer) or superposition state (probability superposition of several different states). The operation of information is extended from traditional logic operations such as "and", "or", "and" to any unitary transformation, and the output can also be superposition state or an eigenstate. So quantum computer will be more flexible and can realize parallel computing< If you want to explain the details, it's a bit troublesome. I'll give you some key words to look up:
1. Quantum state
2. Quantum superposition
3, qubit
4, unitary transformation
5, quantum logic
6, quantum gate (corresponding to traditional logic gate, In fact, it is some special positive transformation)
7, quantum algorithm, quantum algorithm (of course, quantum computer can also realize the traditional algorithm)
8, and then on how to realize from the physical level, it is best to start with quantum optics, because polarized photons are the simplest
in depth:
ordinary digital computers run on binary systems of 0 and 1, which are called "bits". But quantum computers are far more powerful. They can operate on qubits and can compute values between 0 and 1. Suppose an atom placed in a magnetic field rotates like a top, so its axis of rotation can point up or down. Common sense tells us that the rotation of atoms can be up or down, but not all at the same time. But in the strange world of quantum, the atom is described as the sum of two states, an upward turning atom and a downward turning atom. In the wonderful world of quantum, every object is described by the sum of all the incredible states
imagine a string of atoms arranged in a magnetic field and rotating in the same way. If a laser beam is shining on the top of the atoms, it will jump down the group of atoms and quickly flip the rotation axis of some atoms. By measuring the difference between the incoming and outgoing laser beams, we have completed a complex quantum "calculation", involving a lot of rapid spin movement
from the perspective of mathematical abstraction, quantum computer performs the calculation with set as the basic operation unit, while ordinary computer performs the calculation with element as the basic operation unit (if there is only one element in the set, quantum calculation is no different from classical calculation)
take the function y = f (x), X ∈ a as an example. The input parameter of quantum computation is the domain a, and the output domain B is obtained in one step, that is, B = f (a); The input parameter of classical calculation is x, and the output value y is obtained. The range B can only be obtained by multiple calculations, that is, y = f (x), X ∈ a, y ∈ B
quantum computer has a problem to be solved, that is, the output range B can only randomly take out a valid value y. Although the number of elements in output set B is much less than that in input set a by directing the unwanted output to an empty set, it still needs to be calculated many times when all the valid values need to be taken out.
in short,
quantum computer is to replace the original ordinary bits with quantum bits
from the physical level, quantum computers are not based on ordinary transistors, but use spin direction controlled particles (such as proton nuclear magnetic resonance) or polarization direction controlled photons (mostly used in school experiments) as carriers. Of course, in theory, any multi-level system can be used as the carrier of qubits
from the perspective of calculation principle, the input state of quantum computer can be either discrete eigenstate (like traditional computer) or superposition state (probability superposition of several different states). The operation of information is extended from traditional logic operations such as "and", "or", "and" to any unitary transformation, and the output can also be superposition state or an eigenstate. So quantum computer will be more flexible and can realize parallel computing< If you want to explain the details, it's a bit troublesome. I'll give you some key words to look up:
1. Quantum state
2. Quantum superposition
3, qubit
4, unitary transformation
5, quantum logic
6, quantum gate (corresponding to traditional logic gate, In fact, it is some special positive transformation)
7, quantum algorithm, quantum algorithm (of course, quantum computer can also realize the traditional algorithm)
8, and then on how to realize from the physical level, it is best to start with quantum optics, because polarized photons are the simplest
in depth:
ordinary digital computers run on binary systems of 0 and 1, which are called "bits". But quantum computers are far more powerful. They can operate on qubits and can compute values between 0 and 1. Suppose an atom placed in a magnetic field rotates like a top, so its axis of rotation can point up or down. Common sense tells us that the rotation of atoms can be up or down, but not all at the same time. But in the strange world of quantum, the atom is described as the sum of two states, an upward turning atom and a downward turning atom. In the wonderful world of quantum, every object is described by the sum of all the incredible states
imagine a string of atoms arranged in a magnetic field and rotating in the same way. If a laser beam is shining on the top of the atoms, it will jump down the group of atoms and quickly flip the rotation axis of some atoms. By measuring the difference between the incoming and outgoing laser beams, we have completed a complex quantum "calculation", involving a lot of rapid spin movement
from the perspective of mathematical abstraction, quantum computer performs the calculation with set as the basic operation unit, while ordinary computer performs the calculation with element as the basic operation unit (if there is only one element in the set, quantum calculation is no different from classical calculation)
take the function y = f (x), X ∈ a as an example. The input parameter of quantum computation is the domain a, and the output domain B is obtained in one step, that is, B = f (a); The input parameter of classical calculation is x, and the output value y is obtained. The range B can only be obtained by multiple calculations, that is, y = f (x), X ∈ a, y ∈ B
quantum computer has a problem to be solved, that is, the output range B can only randomly take out a valid value y. Although the number of elements in output set B is much less than that in input set a by directing the unwanted output to an empty set, it still needs to be calculated many times when all the valid values need to be taken out.
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