基于Newmark-β法的换热管振动反问题的求解方法  

Inverse problem solution for heat exchange tube vibrations based on Newmark-β method

作　　者：徐波[1] 吴远峰[1] 苏文献[1] 许伍[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《中国工程机械学报》2015年第1期12-15,共4页Chinese Journal of Construction Machinery

摘　　要：换热器管束振动的响应反问题,即根据换热管的结构特性和响应参数确定换热管所受的载荷.按照对响应处理方法的不同,可以分为时域法和频域法.在换热器寿命内,流体诱导换热器管束振动一直是工程师主要关注的问题.20世纪60年代以来,在物理学以及其他众多的科学技术领域中,提出了由输入求输出的反问题,通常称为"数学物理反问题".将换热管处理成无阻尼的、简单的欧拉梁模型.由于时域法拥有更高的识别精度,因此采用基于时域内的Newmark法直接识别换热管所受的载荷,完成载荷的识别.The inverse problem of heat exchange tube-bundle vibration response,viz.the heat exchange tube loading is determined by structural properties and response parameters,can be classified as time and frequency domains based on different response processing methods.Within the heat exchanger lifecycle,the fluid-induced heat exchange tube-bundle vibration is concerned by engineers.Since the 1960 s of last century,the inputoutput inverse problem,i.e.generally the mathematical physics inverse problem,has been proposed in such science and technology disciplines as physics.The heat exchange tube is treated as an undamped simple Euler beam model.Due to the higher accuracy of time-domain method,the Newmark-β method is applied for loading identification.

关 键 词：换热器 反问题 欧拉梁 时域 

分 类 号：TK172[动力工程及工程热物理—热能工程]