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摩擦缓冲器的运用实践表明,缓冲器报废的主要原因之一是箱体的损坏。缓冲器箱体强度计算的现行方法在大载荷的情况下(在缓冲器的压缩力N=180吨时)与实验数据不完全相符。本文提出了在引起塑性变形小的压缩力作用下的箱体计算方法。所研究的这种型式的摩擦缓冲器的主要特点是楔块与箱体之间的力相互作用的不均匀性以及箱体壁上应力分布的不均匀性。计算与试验表明,在摩擦缓冲器箱体的拐角处,当N=140吨时,最大应力就达到σ=4600公斤/厘米~2,这就超过了箱体材料的屈服极限σ=4500公斤/厘米~2。
The application of friction bumpers shows that one of the main reasons for the bumpers being scrapped is the damage of the bombs. The current method of calculating the strength of the bumper cabinet does not exactly match the experimental data at large loads (with a compressive force of N = 180 tons). In this paper, the calculation method of box body under the compressive force with small plastic deformation is proposed. The main features of this type of friction absorber studied are the inhomogeneity of the force interaction between the wedge and the housing and the inhomogeneity of the stress distribution on the wall of the housing. Calculations and tests show that the maximum stress reaches 4600 kg / cm ~ 2 at N = 140 tons at the corner of the friction damper box, which exceeds the yield limit of the box material by σ = 4500 kg / Cm ~ 2.