How to calculate the flexibility of force method

1. Flexibility is a concept of mechanics, which refers to the deformation of the component along the vertical axial direction under axial force. If the flexibility is large, the deformation is large, and the stability of the component is poor. The flexibility is related to the following factors: the section size of the component, the larger the section size, the smaller the flexibility; The longer the length, the greater the flexibility; The flexibility of fixed constraint is smaller than that of sliding constraint, and that of constrained is smaller than that of unconstrained.

2.

The flexibility coefficient is the reciprocal of the stiffness coefficient, and the calculation method is:

the stiffness coefficient is EA / L, where e is the elastic molus of the member, a is the sectional area of the member, and l is the length of the member

The flexibility coefficient is 1 / (EA / L) = L / EA

3. λ B calculation does not need elastic molus, which is related to the yield limit of the material and has nothing to do with the proportional limit

4. Slenderness, also known as slenderness ratio, is a concept of mechanics λ， It refers to the deformation along the vertical axial direction of the component under axial force, which is used to calculate the stability of the compression bar
if the flexibility is large, the deformation is large, and the stability of the component is poor. The flexibility is related to the following factors: the section size of the component is
plane size, the section size is large, and the flexibility is small; The longer the length, the greater the flexibility; The flexibility of fixed constraint is smaller than that of sliding constraint, and that of constrained is smaller than that of unconstrained. Flexibility, which is the reciprocal of stiffness
C, indicates the ability of elastic deformation of parts under the action of force
calculation formula: λ=μ l/i among μ Is the length coefficient of the compression bar, which is related to the constraint conditions of the compression bar, for example, the length coefficient of the hinged support at both ends μ= One end is fixed and the other is free μ= 2. Fixed at one end and hinged at the other μ= 7, actually μ L is the effective length of the strut; L is the length of compression bar; I is the radius of inertia.

5. There are three parts of Graph Multiplication:
the left and right parts are triangle and triangle Graph Multiplication
the middle part is ladder and ladder Graph Multiplication
do you understand
remember to adopt

6. First measure your body, then compare it

7. There are three foundation models: 1. Winkler foundation model (linear elastic foundation model). Winkler foundation model regards the foundation as a re rigid foundation, which is composed of a series of soil columns without friction on the side, and can be simulated by a series of independent springs; 2. The foundation model of spring semi infinite space assumes that the foundation is a uniform, continuous and isotropic spring body in semi infinite space.

8. Do you mean the flexibility coefficient in the force method
each flexibility coefficient is obtained by multiplying the unit load diagram and load diagram
flexibility is the reciprocal of stiffness