Non-linear dynamics modeling method for undercarriage buffer
A non-linear dynamics, landing gear buffer technology, applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve the problem of the effective damping of the landing gear buffer, the inability to draw correct conclusions, ground resonance analysis Errors and other issues, to avoid the cost of body weight, improve accuracy, and avoid large errors
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[0039] Specific embodiment: Taking a certain type of helicopter landing gear buffer as an example, using the structure configuration and structural parameters of this type of helicopter landing gear buffer, as well as test data, establish a buffer nonlinear dynamic characteristic model, the specific steps are as follows:
[0040] Step 1: Change the axial force of the buffer F S Expressed as air spring force F a , Internal friction F f And oil damping force F h Sum, namely F S = F a +F f +F h .
[0041] Step 2: Calculate the air spring force of the buffer. First, calculate the static stiffness of the buffer. During static compression, the air spring force model of the low pressure chamber of the buffer: Air spring force model of high pressure chamber: F ′ ( s ) = a 1 1 - bS max L + a ′ 1 1 - b ′ ( s - S max L ) , Combining the static compression characteristic test data of the buffer, see Table 2. Us...
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