波纹管的计算问题 Calculation of bellows
Double-wall bellows has been used as a sensitive element in the instrument since the beginning of this century. For a long time, the performance of bellows and its characteristics can only be determined experimentally.
It was only in the early forties that comparisons were sufficient for basic research on bellows calculations. This is due to the many difficulties encountered in selecting the calculation diagram that is easy to understand for theoretical analysis and reflects the real bellows well. The energy method is very effective for bellows calculations. Odochev first adopted this force method, and used the Litz method to find out.
This solution can determine the sensitivity of the bellows. When determining the sensitivity, taking into account the geometric characteristics of the corrugation, it is assumed that the wall thickness of the corrugated tube is inversely proportional to the distance from the central axis (this can be used as a feature of the hydroformed corrugated tube). The contour of the meridional section of the bellows can be considered as a combination of some arcs of the same diameter of the foot mountain—'some straight lines. A simple formula can be used to determine the displacement of the bottom of the bellows when subjected to the axial JJ load. The calculation results are in good agreement with the experiments. This situation is why the calculation method proposed by B.H. Duodoshev is welcome. His 15 Its formula is quoted in the references and special literatures concerning the calculation of elastic components. However, when determining the stress, the first approximation of the Litz method does not give good results, so the stress calculation in the bellows is N The question has been pending for a long time.