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某设备入水试验的高速摄像系统设计

工程与试验 2024年第2期64卷 61-63页

作者：刘颖茜中国飞机强度研究所强度与结构完整性全国重点实验室陕西西安710065

根据某气炮试验台的高速摄像系统设计需要,搭建了针对某设备入水试验的高速摄像系统,阐述了其工作原理,并进行了系统设计,包括硬件架构、相机参数、相机布局及观察窗尺寸设计。通过所搭建的系统对设备速度进行分析,证明系统设计合理,该... 详细信息

根据某气炮试验台的高速摄像系统设计需要,搭建了针对某设备入水试验的高速摄像系统,阐述了其工作原理,并进行了系统设计,包括硬件架构、相机参数、相机布局及观察窗尺寸设计。通过所搭建的系统对设备速度进行分析,证明系统设计合理,该气炮试验台性能稳定。

关键词：高速摄像气炮速度姿态

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基于品牌定位分析的产品识别设计研究

玩具世界 2024年第1期 202-204页

作者：周颖刘颍希广州美术学院深圳麦克韦尔科技有限公司

品牌建设是企业发展的重要内容，如何塑造一个有价值的品牌，并将其以独特的方式传达给顾客，这是当前中国企业所要面对的一个重大难题。文章围绕品牌定位分析与产品识别设计的紧密联系，深入探讨如何通过品牌定位来指导和优化产品识别... 详细信息

品牌建设是企业发展的重要内容，如何塑造一个有价值的品牌，并将其以独特的方式传达给顾客，这是当前中国企业所要面对的一个重大难题。文章围绕品牌定位分析与产品识别设计的紧密联系，深入探讨如何通过品牌定位来指导和优化产品识别设计。首先，文章明确品牌的定义和作用，并对品牌定位的基本概念进行阐述，分析品牌定位在产品设计中的重要性。在产品识别设计部分，文章详细讲述产品识别设计的内涵与作用，并分析其在外观和界面设计方面的表现方式。最后文章聚焦于品牌定位分析对产品识别设计的影响，从品牌定位、产品识别与目标客户关系的角度出发，提出基于品牌定位的产品设计策略，包括确定品牌核心价值与视觉元素的协调和利用差异化策略强化品牌识别，文章研究旨在为企业的品牌建设和产品设计提供借鉴。

关键词：品牌定位产品识别设计品牌价值目标客户

基于“湿热瘀滞”及“气津两伤”应用经方辨治运动性横纹肌溶解症思路

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中医药通报 2024年第4期23卷 22-24,55页

作者：贾九丽肖勇洪刘颖希河南护理职业学院河南安阳455000 长沙市中医医院湖南长沙410125 湖南中医药大学湖南长沙410208

基于临床实践总结认为运动性横纹肌溶解症以“湿热瘀滞”及“气津两伤”为病机演变特点,急性损伤期治以清热利湿、化瘀通滞为主,方处茵陈蒿汤加减;慢性恢复期治以清余热、养气津、和脾胃为要,方处竹叶石膏汤加减。

关键词：运动性横纹肌溶解症湿热瘀滞气津两伤经方

Identification of vibration loads on hydro generator by using hybrid genetic algorithm

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Acta Mechanica Sinica 2006年第6期22卷 603-610页

作者： Shouju Li yingxi liu State Key Laboratory of Structural Analysis for Industrial Equipments Dalian University of Technology Dalian 116023 China

Vibration dynamic characteristics have been a major issue in the modeling and mechanical analysis of large hydro generators. An algorithm is developed for identifying vibration dynamic characteristics by means of hybrid genetic algorithm. From the measured dynamic responses of a hydro generator, an appropriate estimation algorithm is needed to identify the loading parameters, including the main frequencies and amplitudes of vibrating forces. In order to identify parameters in an efficient and robust manner, an optimization method is proposed that combines genetic algorithm with simulated annealing and elitist strategy. The hybrid genetic algorithm is then used to tackle an ill-posed problem of parameter identification, in which the effectiveness of the proposed optimization method is confirmed by its comparison with actual observation data.

关键词： Hybrid genetic algorithm Parameteridentification Vibration responses Fieldmeasurement Simulated annealing

Numerical analysis of ossicular chain lesion of human ear

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Acta Mechanica Sinica 2009年第2期25卷 241-247页

作者： yingxi liu Sheng Li Xiuzhen Sun State Key Laboratory of Structural Analysis for IndustrialEquipment Dalian University of Technology116024 Dalian China ENT Department The Second Affiliated Hospital of DalianMedical University 116025 Dalian China

Abstract Lesion of ossicular chain is a common ear disease impairing the sense of hearing. A comprehensive numerical model of human ear can provide better understanding of sound transmission. In this study, we propose a three-dimensional finite element model of human ear that incorporates the canal, tympanic membrane, ossicular bones, middle ear suspensory ligaments/muscles, middle ear cavity and inner ear fluid. Numerical analysis is conducted and employed to predict the effects of middle ear cavity, malleus handle defect, hypoplasia of the long process of incus, and stapedial crus defect on sound transmission. The present finite element model is shown to be reasonable in predicting the ossicular mechanics of human ear.

关键词： Finite element model Ossicular chain lesionAcoustic-structural coupled analysis Middle ear cavity Sound transmission

Fatigue Analysis and Life Prediction of Dumpers with Cumulative Fatigue Damage Approach

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上海交通大学学报 2004年第Z2期38卷 96-100页

作者： LI Shouju liu yingxi SUN Huiling State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian116024 China State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian116024 China Department of Engineering Mechanics Dalian University of Technology Dalian116024China

A fatigue damage model is developed for evaluating accumulative fatigue damage of dumpers. The loading spectrums acted on dumpers are created according to measured strain data in field. The finite element analysis is carried out for assessing stress distribution and strength characteristics of dumpers. Fatigue damage indexes and service life are calculated by a modified Palmgren-Miner rule. The investigation shows that fatigue notch factor has a significant influence on the calculation of fatigue damage of dumpers.

关键词： fatigue life prediction dumper miner's rule finite element analysis loading spectrums

Static analysis of tympanic membrane in aero-otitis media by three-dimensional model of the middle ear

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Theoretical & Applied Mechanics Letters 2022年第2期12卷 111-117页

作者： Kaili Sun Xu Bie Zhixing Feng Shen Yu Xiuzhen Sun Jizhe Wang yingxi liu Lina Peng Zhaoxu Yao Department of Otolaryngology-Head and Neck Surgery The 2nd Affiliated Hospital of Dalian Medical UniversityDalian 116027China Department of Otolaryngology-Head and Neck Surgery Handan Central HospitalHandan 056001China Department of Engineering Mechanics Dalian University of TechnologyDalian 116024China

The three-dimensional(3D)model of the middle ear is of great significance to the research of middle ear related *** particular focus of this work is to simulate the impact of aircraft altitude and speed changes on the tympanic membrane(TM)during the descent phase,so as to analyze the pathogenesis of aero-otitis media and the mechanical response characteristics of TM under static *** simulations showed that the stress and strain of TM increase as the altitude difference and speed of the aircraft increase,and the maximum stress and strain areas are consistent with the clinical observation of TM ***,among many prevention and treatment measures of aero-otitis media,it is a therapeutic method to directly balance the pressure difference between the inner and outer TM.

关键词： Aero-otitis media The middle ear Numerical simulation Statics calculation Tympanostomy tube placement

Numerical analysis of respiratory flow patterns within human upper airway

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Acta Mechanica Sinica 2009年第6期25卷 737-746页

作者： Ying Wang yingxi liu Xiuzhen Sun Shen Yu Fei Gao State Key Laboratory of Structural Analysisfor Industrial Equipment Dalian University of Technology116024 Dalian China Department of Otorhinalaryngology The Second Affiliated Hospital of Dalian Medical University116027 Dalian China

A computational fluid dynamics （CFD） approach is used to study the respiratory airflow dynamics within a human upper airway. The airway model which consists of the airway from nasal cavity, pharynx, larynx and trachea to triple bifurcation is built based on the CT images of a healthy volunteer and the Weibel model. The flow character- istics of the whole upper airway are quantitatively described at any time level of respiratory cycle. Simulation results of respiratory flow show good agreement with the clinical mea- sures, experimental and computational results in the litera- ture. The air mainly passes through the floor of the nasal cavity in the common, middle and inferior nasal meatus. The higher airway resistance and wall shear stresses are distrib- uted on the posterior nasal valve. Although the airways of pharynx, larynx and bronchi experience low shear stresses, it is notable that relatively high shear stresses are distrib- uted on the wall of epiglottis and bronchial bifurcations. Besides, two-dimensional fluid-structure interaction models of normal and abnormal airways are built to discuss the flow-induced deformation in various anatomy models. The result shows that the wall deformation in normal airway is relatively small.

关键词： Upper airway . Computational fluid dynamicsAirflow distribution .Resistance

Computational fluid dynamics simulations of respiratory airflow in human nasal cavity and its characteristic dimension study

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Acta Mechanica Sinica 2008年第2期24卷 223-228页

作者： Jun Zhang yingxi liu Xiuzhen Sun Shen Yu Chi Yu State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116024 China Department of Otorhinolaryngology the Second Affiliated Hospital of Dalian Medical University Dalian 116027 China

To study the airflow distribution in human nasal cavity during respiration and the characteristic parameters of nasal structure, three-dimensional, anatomically accurate representations of 30 adult nasal cavity models were recons- tructed based on processed tomography images collected from normal people. The airflow fields in nasal cavities were simulated by fluid dynamics with finite element software ANSYS. The results showed that the difference of human nasal cavity structure led to different airflow distribution in the nasal cavities and variation of the main airstream passing through the common nasal meatus. The nasal resistance in the regions of nasal valve and nasal vestibule accounted for more than half of the overall resistance. The characteristic model of nasal cavity was extracted on the basis of characteristic points and dimensions deduced from the original models. It showed that either the geometric structure or the airflow field of the two kinds of models was similar. The characteristic dimensions were the characteristic parameters of nasal cavity that could properly represent the original model in model studies on nasal cavity.

关键词： Nasal cavity Characteristic dimension Three-dimensional reconstruction Numerical simulation of flowfield Computational fluid dynamic Finite element method