CAJ | 학술논문

使役状态机架变形测量及机架完整性评价对钢丝缠绕重型模锻液压机的安全运转至关重要。常规的测试手段有局限性无法实现机架变形全场测量，运用数字图像相关法(Digital image correlation，DIC)实现了400 MN模锻液压机加、卸载工作循环机架位移和变形的全场测量。用降温法模拟钢丝缠绕预紧力，对机架预紧、合成工况进行有限元模拟，有限元结果与DIC测量结果吻合，验证了降温法有限元模型。研究机架工作循环变形特点，加、卸载过程中机架变形基本对称，标识点水平间距A2D2最大变化量5.45 mm，竖直间距A1A3最大变化量1.53 mm，均符合设计要求。基于DIC的测量方法有效解决了重型液压机机架变形全场测量难题，并为降温预紧有限元模型提供了验证，为钢丝缠绕液压机设计提供了有益参考。
사역상태궤가변형측량급궤가완정성평개대강사전요중형모단액압궤적안전운전지관중요。상규적측시수단유국한성무법실현궤가변형전장측량，운용수자도상상관법(Digital image correlation，DIC)실현료400 MN모단액압궤가、사재공작순배궤가위이화변형적전장측량。용강온법모의강사전요예긴력，대궤가예긴、합성공황진행유한원모의，유한원결과여DIC측량결과문합，험증료강온법유한원모형。연구궤가공작순배변형특점，가、사재과정중궤가변형기본대칭，표식점수평간거A2D2최대변화량5.45 mm，수직간거A1A3최대변화량1.53 mm，균부합설계요구。기우DIC적측량방법유효해결료중형액압궤궤가변형전장측량난제，병위강온예긴유한원모형제공료험증，위강사전요액압궤설계제공료유익삼고。
Deformation measurement and integrity evaluation of the frame are vital for normal running of the heavy hydraulic press with steel wire wound.The full-field deformation measurement of the frame is realized hardly due to the limitations of the conventional testing method. By using the digital image correlation method(DIC), the full-field measurements of the deformation for the frame are performed for the loading-unloading cycles of the 400 MN die forging press. Cooling method is employed for simulating the pre-stress of the wound wire and then finite element method(FEM) simulations are performed for the pre-stressed and the combined loading cases of the frame.The FEM results agree well with the DIC experimental data, which verifies the validities of the FEM modelling. Researches on the frame deformation during the working cycles show that the deformation of the frame is basically symmetrical. The maximum changes of the horizontal spacingA2D2and the vertical spacingA1A3 are 5.45 mm and 1.53 mm respectively which meets the design requirement.The DIC method is used to effectively solve the problem of the full-field deformation measurement of the frame of the heavy hydraulic press, verify the FEM modeling of the frame and provide the beneficial reference for the design of the heavy hydraulic press with steel wire wound.