采用塑性增量理论，建立了波纹管液压胀形的应力、应变数值计算方法，解决了波纹管液压胀形工艺的理论计算问题。在该理论分析基础上，制定并实现了小变薄率胀形波纹管的特殊液压胀形工艺的新构思，成功地研制出了小变薄率波纹管。理论计算与试验结果相吻合。 Adopting plastic incremental theory, the stress and strain numerical calculation method of hydraulic bulging of bellows was established, and the theoretical calculation of hydraulic bulging of bellows was solved. On the basis of the theoretical analysis, a new concept of special hydraulic bulging process of small thinning ratio bellows was developed and realized, and a small thinning ratio bellows was successfully developed. The theoretical calculation is consistent with the experimental results.