近年降膜式吸收器计算模型概述

介绍近十年来竖直管和平板降膜式吸收器计算模型的发展，以理论模型的改进过程为序，概括叙述各种模型所采用的假设、控制方程、边界条件和数学方法，通过计算结果探讨各种模型的优缺点，有利于进一步优化数学模型。     

Conjoint-analysis-based multiattribute optimization: application in acoustical design

The concept of customer preference, or product value, prevalent in economics and management science, is just beginning to be used in engineering design. This concept and the associated measurement approaches offer us a theoretically appealing way to aggregating customer preferences for multiple product attributes into a single objective function, representing total product value, which may then be maximized. Among these methods, conjoint analysis has emerged as the most popular approach in marketing to estimate the value that customers attach to different features of a product that can be at different levels. In this paper, we use conjoint analysis in a novel way to assess a product designer’s preferences for addressing a practical problem in acoustical design. We incorporate a designer’s preferences for reducing noise in a curved pressure vessel excited with broadband noise. The shell is part of a large industrial machine. The “product” here refers to a broadband vibration absorber(s) attached to the structure. Through direct interaction with the design engineer, we elicit his/her preferences for various alternative design configurations and specify an aggregate value function. We then apply optimization techniques, interfaced to simulation codes, to maximize the value function. We show that this method provides more economical designs compared to certain conventional formulations. We conclude by summarizing some limitations to this research, which point to several future research opportunities.     

Ion-beam etched multi-level resist technique for electroplating of submicron gold absorber patterns

A structuring process is developed which enables the fabrication of gold patterns by electroplating with a minimum linewidth of ? 0.3 μm. These patterns are used as mask patterns for X-ray lithography. They can be up to 1.6 μm thick. For this purpose, a resist pattern, which is generated by an electron beam, is transmitted to a multi-layer system by reactive ion-beam etching. The multi-layer system consists of a 2 μm thick polyimide layer, a 70 nm thick aluminum intermediate layer and a 30 nm thick gold passivation layer.With this process, X-ray masks with a polyimide membrane were produced and utilized for exposure to synchrotron radiation.     

Dynamics of Vibroprotection Systems with a Ball-Type Low-Frequency Oscillation Absorber

The paper deals with low-frequency vibration of a vibroprotection system consisting of a heavy ball with an air damper in an inverted-pendulum spherical socket under the action of external harmonic excitation. The ball in the spherical socket rolls without sliding and is a working body of the ball-type absorber of the inverted-pendulum forced oscillation. Dynamic equations for joint motions of the heavy ball and the inverted pendulum are formulated and analyzed. The authors have obtained amplitude-frequency characteristics of the absolute deviation of the inverted pendulum upper point and the relative displacement of the ball in the spherical socket. A new procedure for the determination of setting parameters for a ball-type oscillation absorber is proposed.     

10 MW高温气冷实验堆硼吸收球停堆系统气力输送模拟试验研究

吸收球停堆系统是10MW高温气冷实验堆(HTR-10)的第二停堆系统,于紧急事故停堆之后、重新开堆之前投入运行,利用负压输送过程将在紧急停堆时进入反应堆堆芯落球孔道内的中子吸收球输送到位于堆顶的贮球罐内,实现正常开堆或反应堆再临界。运用气力输送的密相输送理论,对回路各部件和各管段的气固两相流阻力进行计算,并在1：1模拟试验台架上,以空气和氦气为载体,真实硼吸收球为物料,进行了气力输送试验研究。试验数据与理论分析相符合,吸收球第二停堆系统的气力输送功能满足HTR-10工程的技术要求。     

轿车、微车悬架减振器设计与反求工程研究

该文在被动悬架可行设计区理论和工程实践的基础上,由悬架减振器的开阀阻尼系数、最大开阀阻尼系数和平安比构造的非线性外特性为依据,对轿车、微车减振器匹配"软簧轻阻尼"悬架的设计与反求工程,以及减摩擦力、降噪声的软件和硬件质量控制工程,提出了原则性的方法和应用工程结论.     

聚苯胺与Si/C/N复合粉体的制备及其微波介电特性

用原位合成法在Si/C/N纳米粉表面包覆聚苯胺,制备出聚苯胺与Si/C/N复合材料,复合粉体近似球形,粒径为1～3μm.研究了聚苯胺与Si/C/N复合粉在8.2～12.4GHz的微波介电特性,与纳米Si/C/N相比,聚苯胺与Si/C/N复合粉体的ε′、ε"和tanδ有所增加,ε′在5.16～5.88范围内波动,ε"的变化范围为1.96～2.53,介电损耗角正切值达到了0.43,具有较好的微波介电特性.在8～12.4GHz范围内随频率的增加,聚苯胺与Si/C/N复合粉体的ε′、ε"和tanδ值均出现频响效应,是较为理想的微波吸收材料.     

超颖材料在隐身方面的应用进展

超颖材料的奇异特性和近几年的研究进展使该材料成为人们研究的重点，其发展前景引起了学术界，产业界，尤其是军方的无限遐想。针对超颖材料在隐身方面的应用对其基本特性和实验成果进行了总结，并对该材料在隐身和其它方面的应用前景进行了描述。     

核电乏燃料贮存用中子吸收材料的发展及趋势

对常用的核电厂乏燃料贮存用中子吸收材料以及相应的乏燃料贮存格架结构形式进行了讨论,按照HAF102的要求提出了一种新型乏燃料贮存格架结构设计,并据此讨论了中子吸收材料的发展方向与实现路径,提出了后续中子吸收材料的研发思路。     

一种极化无关的多频带超材料吸波体的仿真与实验研究

设计了一种基于C型组合谐振结构的多频带超材料吸波体,通过CST微波工作室进行仿真分析,采用弓形法对超材料样品的反射率进行实验验证。仿真结果表明,该吸波体在3.28GHz、3.89GHz、6.61GHz、9.76GHz、11.43GHz实现了近完美吸收,吸收强度分别为99.67%、99.85%、98.10%、99.99%、99.25%,实测结果和仿真结果基本一致。通过表面电流分布、等效电路图以及理想阻抗匹配理论分析了该吸波体作用的物理机理。该超材料吸波体有极化无关的特性。