The aim of research was to determine the stress-strain-state of water conducting belt made of composite material (fiberglass) for a wide coverage multitower sprinkling machine of cabling construction, assessment of its load-bearing capacity and stiffness. Basic method of work is finite element design with the subsequent analytical results processing, using reasonable hypotheses and assumptions. In the above-materials load cases of hard span are considered. The stress state of hard span with guys was determined in three versions: with a non-strained guys, the tension guys, the transfer of guys point of attachment to the composite pipe flanges. The studies found out that the tested rigid span of water conductive belt, made of pipes (fiberglass) doesn’t meet the required conditions of structural rigidity and integrity in all design cases. The most acceptable option is the one based on the transfer the fixing point of guys with the composite pipe flanges. In this case the maximum relative deformations are equal to 0.27 %, that is significantly below the permissible value (0.40%), therefore, the condition of pipe sealing is performed. The total direct stress in the pipe is 53.16 MPa, which is significantly less than the maximum allowable tensile stress at longitudinally (162.50 MPa) and compression (79.20 MPa) with a view to ensuring a given resource. Extremes of maximum bending moments are equal each other and constitute 2.74 kNm, which is 7 % lower than in the variant of fastening guys not on the flanges.
Keywords: wide coverage multitower sprinkling machine, fwater conductive belt, rigid span, guy, design calculation.
