Method for determining weak rods in truss structures of hoisting and conveying machinery
A technology for lifting and transporting machinery and truss structures, which is applied in special data processing applications, instruments, electrical digital data processing, etc. The effect of increasing market competitiveness
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[0073] The truss arm in this embodiment is as Figure 11 As shown, it is a truss arm section welded by circular steel pipes. The ends of the four main chords at the right end are fixed, and the left end bears the torque, and the torque is applied through the thrust generated by two symmetrical oil cylinders, and the weak links of the structure are analyzed and determined. The material yield limit of the main chord of the jib section is 770MPa, the yield limit of the web tube material is 245MPa, the density is 7850kg / m3, and the elastic modulus is 2.1×10 11 , Poisson's ratio 0.3.
[0074] The method for determining the weak members of the truss structure in the above-mentioned hoisting and transporting machinery is carried out according to the following steps:
[0075] Step 1: Use the finite element software ANSYS to carry out parametric modeling, constrain all degrees of freedom at the right end of the arm section, and use the mass point Mass21 at the left end to couple the ...
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