波轮式脱水机甩干桶爆裂原因及有限元模拟分析  

Cause analysis and finite element simulation of cracking of drying barrel in wave wheel dehydrator

作　　者：王慧萍[1] 刘迎春 袁北哲 杨波 杜莹 钟振前 WANG Hui-ping;LIU Ying-chun;YUAN Bei-zhe;YANG Bo;DU Ying;ZHONG Zhen-qian(China National Institute of Standardization, Beijing 100191, China;NCS Testing Technology Co., Ltd.,Beijing 100081, China;University of Science and Technology Beijing, Beijing 100091, China)

机构地区：[1]中国标准化研究院,北京100191 [2]钢研纳克检测技术股份有限公司,北京100081 [3]北京科技大学,北京100091

出　　处：《冶金分析》2020年第6期68-74,共7页Metallurgical Analysis

摘　　要：消费者反馈信息表明某品牌的脱水机甩干桶在用户使用过程会发生爆裂事故,为分析事故发生的原因,实验对事故品牌的脱水机和对比品牌的脱水机进行了一系列试验,应用拉伸试验、压力试验、接缝区剖面结构分析以及有限元仿真模拟等研究了脱水机甩干桶的爆裂原因和甩干桶内壁的应力分布。拉伸试验和压力试验结果表明,事故甩干桶的接缝处结合力很薄弱,仅为正常桶身强度的13%,而对比品牌的甩干桶接缝区的强度与桶身的强度相当,大约是前者的5.7倍。接缝区剖面结构分析表明,两甩干桶的接缝方式不同是造成二者强度存在差异的原因,前者为卷压式连接,后者采用了焊接方式。应用有限元分析了甩干筒的应力分布,结果表明,事故品牌的甩干桶接缝处的应力水平偏高,在相同工作条件下其发生开裂的风险远高于对比品牌的接缝处。试验分析和有限元理论计算均表明,事故品牌甩干桶的卷压连接处结合力偏低是造成其发生爆裂的主要原因。The consumer feedback information indicated that the drying barrel of a brand of dehydrator might be cracked in the process of use.In order to analyze the reasons for accident,a series of tests were carried out for the dehydrator of accident brand and contrast brand.By using tensile test,pressure test,section structure analysis of joint area and finite element simulation,the cracking reasons of drying barrel and the stress distribution of inner wall were studied.The results of tensile test and pressure test showed that the bonding force at the joint of the accident drying barrel was very weak,only 13%of the strength of the normal barrel body.The strength of the joint area of the contrast brand drying barrel was equivalent to the strength of the barrel body,which was about 5.7 times of the former.The analysis of section structure of the joint area showed that the difference of joint mode between two barrels resulted in the difference of their strength.The former was the crimping joint connection,while the latter was connected by welding.The stress distribution of drying barrel was analyzed by finite element method.The results showed that the stress level at the joint of accident brand was higher,and the cracking risk under the same working condition was much higher than that of the contrast brand.Both experimental analysis and finite element theoretical calculation indicated that the main reason for cracking was the low binding force at the crimping joint for the accident brand dehydrator.

关 键 词：力学试验 有限元模拟 波轮式脱水机 卷压 

分 类 号：TG142.1[一般工业技术—材料科学与工程]