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目前在提升机设计、计算中,传统的算法是将作用在筒壳上的载荷考虑为轴对称的静载荷,但实际作用在壳上的载荷是既沿周向又沿轴向运动的非对称载荷。这样,由传统算法得到的筒壳中的应力与筒壳中的实际应力状态有差异,但这并未得到应有的注意。本文采用福留盖壳体理论,分析了筒壳对实际载荷工况的动力响应,借助计算机进行了具体计算,并用实验进行了验证。理论和实验都表明,筒壳的真实应力与按传统算法得到的应力有一定差异。实际的应力值明显较大,且筒壳的最大应力发生在缠绕过程中,而不是缠绕终了。
At present, in hoist design and calculation, the traditional algorithm considers the load acting on the shell as an axisymmetric static load, but the actual load applied on the shell is asymmetric both in the circumferential direction and in the axial direction Load. Thus, there is a difference between the stress in the shell obtained by the conventional algorithm and the actual stress in the shell, but this has not been given due attention. In this paper, Fuhou lid shell theory is used to analyze the dynamic response of the shell to the actual load case. The calculation is carried out by computer, and the experiment is validated. Both theory and experiment show that there is a certain difference between the real stress of cylinder shell and the stress obtained by traditional algorithm. The actual stress is significantly larger, and the maximum stress in the shell occurs during the winding process, rather than at the end of the winding.