低密度聚乙烯压缩机扭转振动计算及验证
Calculation and verification for crankshaft torsional vibration of hypercompressor in LDPE unit
叶君超 1余小玲 2侯小兵 3卢昌存 4吕倩 2盘潇潇3
作者信息
- 1. 西安交通大学能源与动力工程学院,陕西西安 710049;中石化石油机械股份有限公司三机分公司,湖北武汉 430040
- 2. 西安交通大学化学工程与技术学院,陕西西安 710049
- 3. 中石化石油机械股份有限公司三机分公司,湖北武汉 430040
- 4. 中国石油化工股份有限公司北京燕山分公司,北京 102500
- 折叠
摘要
以低密度聚乙烯压缩机轴系为研究对象,分别采用多体动力学法和集中参数法进行了模态与响应计算,采用无线应变测试系统进行了扭转振动测试及评估,得到了轴系一阶扭转固有频率及动态扭矩,并将计算结果与测试结果进行对比分析.结果表明:多体动力学法和集中参数法的计算结果与测试结果的时域误差均小于17%,一阶固有频率误差均小于3%,两种方法都可以对具有类似结构动力学特性并不明显的轴系进行扭转振动分析,结果的准确度均能满足工程实际需求.
Abstract
Multi-body dynamics and lumped parameter methods were adopted respectively to do modal and response computation for an in-service secondary compressor shafting in low density polyethylene unit.Its torsional vibration was tested and evaluated by the wireless strain testing system to obtain the dynamic torque and first-order natural frequency of the shafting.The comparison results between the calculation and the test show that the computation errors in time domain for both the multi-body dynamics method and the lumped parameter method to test results are less than 17%,and that for the first-order natural frequency is less than 3%.Both methods are suitable for analyzing the torsional vibration of the shafting with similar structure without obvious dynamic characteristics,and the computation accuracy of both methods can meet engineering requirements.
关键词
低密度聚乙烯/扭转振动/多体动力学法/集中参数法/压缩机Key words
low density polyethylene/torsional vibration/multibody dynamics method/lumped parameter method/compressor引用本文复制引用
基金项目
国家自然科学基金资助项目(52076166)
温州市重大科技项目(ZG2020042)
压缩机技术国家重点实验室(压缩机技术安徽省实验室)开放基金项目(SKL-YSJ202111)
出版年
2024
NETL
NSTL
万方数据