正拱型爆破片的疲劳寿命及其影响因素研究
发布时间：2019-01-24 08:51
【摘要】：爆破片作为一种保护压力容器安全的安全泄放装置,其疲劳寿命是工程中十分关注的问题。目前国内外对爆破片疲劳性能的研究不多,而对在役爆破片疲劳性能的影响因素又较多,故规定和预测爆破片的疲劳寿命相当困难。我国的各个标准中对爆破片装置的疲劳寿命没有明确规定,只要求进行定期更换,这是不合理的。正确合理确定爆破片的疲劳寿命,既能为使用厂家节省成本、减少损失,又能保证生产、设备正常安全运行。本文搭建了一个用于正拱型爆破片疲劳寿命实验的实验平台,对正拱型爆破片进行了疲劳实验,并与ANSYS有限元模拟结合,研究了压环圆角、残余应力等对爆破片疲劳寿命的影响,对正拱型爆破片的研究与制造具有重要意义。本文主要的研究内容如下：(1)搭建了一个应用范围广、压力波形可调、耐疲劳性能强的,用于正拱型爆破片疲劳寿命实验的实验平台。改进了高压脉冲实验机,设计了连接实验机与爆破片的夹具,并改进了夹具的密封性能与抗疲劳性能,使疲劳实验平台能准确地输出高压脉冲波形,用于进行正拱型爆破片的疲劳寿命实验。(2)进行正拱型爆破片的疲劳寿命实验。自主将圆平板成型加工制造成正拱型爆破片,进行正拱型爆破片的疲劳寿命实验,并与静压爆破实验进行对比；对不同压环圆角下的正拱型爆破片进行疲劳寿命实验,研究了压环圆角对正拱型爆破片疲劳寿命的影响。(3)利用ANSYS有限元软件对正拱型爆破片进行应力分析,通过计算应力强度来计算正拱型爆破片的疲劳寿命；给出了不同弯曲程度R/S对正拱型爆破片的疲劳破坏位置影响的临界曲线；发现残余应力对正拱型爆破片的疲劳寿命有很大影响；提出正拱型爆破片疲劳寿命相关的工程应用。
[Abstract]:As a kind of safe release device for protecting pressure vessel, the fatigue life of blasting disc is a problem of great concern in engineering. At present, there are not many researches on the fatigue performance of blasting discs at home and abroad, and there are many factors affecting the fatigue performance of blasting discs in service, so it is very difficult to specify and predict the fatigue life of blasting discs. The fatigue life of the explosive disc device is not clearly stipulated in the standards of our country. It is unreasonable to require periodic replacement only. The correct and reasonable determination of the fatigue life of the blasting disc can not only save the cost, reduce the loss, but also ensure the production and the normal and safe operation of the equipment. In this paper, an experimental platform for fatigue life test of positive arch blasting disc is set up. The fatigue test of positive arch blasting disc is carried out, and combined with ANSYS finite element simulation, the circular corner of compression ring is studied. The influence of residual stress on the fatigue life of blasting disc is of great significance to the research and manufacture of positive arch blasting disc. The main contents of this paper are as follows: (1) an experimental platform for fatigue life test of positive arch blasting discs with wide application range, adjustable pressure waveform and strong fatigue resistance is set up. The high pressure pulse experiment machine is improved, the fixture connecting the experiment machine and the blasting disc is designed, and the sealing performance and the fatigue resistance performance of the fixture are improved, so that the fatigue experiment platform can output the high pressure pulse waveform accurately. It is used to test the fatigue life of the positive arch blasting disc. (2) the fatigue life experiment of the positive arch blasting disc is carried out. In this paper, the circular plate is made into a positive arch blasting disc, and the fatigue life test of the positive arch blasting disc is carried out, and compared with the static pressure blasting test. In this paper, the fatigue life of the normal arch blasting disc with different pressure ring circular angle is tested, and the influence of the pressure ring circle angle on the fatigue life of the normal arch blasting disc is studied. (3) the stress analysis of the normal arch blasting disc is carried out by using ANSYS finite element software. The fatigue life of the positive arch blasting disc is calculated by calculating the stress intensity. The critical curve of the influence of different bending degree R / S on the fatigue failure position of the normal arch blasting disc is given, and it is found that the residual stress has a great influence on the fatigue life of the normal arch blasting disc. The engineering application related to fatigue life of positive arch blasting disc is put forward.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.3
本文编号：2414325
[Abstract]:As a kind of safe release device for protecting pressure vessel, the fatigue life of blasting disc is a problem of great concern in engineering. At present, there are not many researches on the fatigue performance of blasting discs at home and abroad, and there are many factors affecting the fatigue performance of blasting discs in service, so it is very difficult to specify and predict the fatigue life of blasting discs. The fatigue life of the explosive disc device is not clearly stipulated in the standards of our country. It is unreasonable to require periodic replacement only. The correct and reasonable determination of the fatigue life of the blasting disc can not only save the cost, reduce the loss, but also ensure the production and the normal and safe operation of the equipment. In this paper, an experimental platform for fatigue life test of positive arch blasting disc is set up. The fatigue test of positive arch blasting disc is carried out, and combined with ANSYS finite element simulation, the circular corner of compression ring is studied. The influence of residual stress on the fatigue life of blasting disc is of great significance to the research and manufacture of positive arch blasting disc. The main contents of this paper are as follows: (1) an experimental platform for fatigue life test of positive arch blasting discs with wide application range, adjustable pressure waveform and strong fatigue resistance is set up. The high pressure pulse experiment machine is improved, the fixture connecting the experiment machine and the blasting disc is designed, and the sealing performance and the fatigue resistance performance of the fixture are improved, so that the fatigue experiment platform can output the high pressure pulse waveform accurately. It is used to test the fatigue life of the positive arch blasting disc. (2) the fatigue life experiment of the positive arch blasting disc is carried out. In this paper, the circular plate is made into a positive arch blasting disc, and the fatigue life test of the positive arch blasting disc is carried out, and compared with the static pressure blasting test. In this paper, the fatigue life of the normal arch blasting disc with different pressure ring circular angle is tested, and the influence of the pressure ring circle angle on the fatigue life of the normal arch blasting disc is studied. (3) the stress analysis of the normal arch blasting disc is carried out by using ANSYS finite element software. The fatigue life of the positive arch blasting disc is calculated by calculating the stress intensity. The critical curve of the influence of different bending degree R / S on the fatigue failure position of the normal arch blasting disc is given, and it is found that the residual stress has a great influence on the fatigue life of the normal arch blasting disc. The engineering application related to fatigue life of positive arch blasting disc is put forward.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.3
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