文档详情

vibration test4(振动测试).pdf

发布：2017-07-02约1.19万字共3页下载文档

文本预览下载声明

王彤：《振动测试实验》第四讲1/3 ，2011-12-2 频率混叠《振动测试实验》第四讲 • 采样信号的频谱包含原信号的频谱和无限个经过平移的原信号频谱，平移量为采样频率Fs |X (f )| 动态信号采集 Fs Fs • 若原信号中含有大于采样频率1/2的频率成分，将叠加到采样频率1/2以内，并与该频率内的数据发生混叠 • 直观物理解释：在一个信号周期内采集的数据点不超 1 过2个，所得到的离散序列不足以表现信号的周期性 5 x ( t) 加速度 * 适调器 * 传感器模拟信号中含有 f 3 = 900Hz * t 频率为900Hz ， f S = 500Hz 0 a 1 * 1 400Hz及100Hz 的 * 0 0 成分

显示全部

相似文档

vibration test2(振动测试).pdf 王彤：《振动测试实验》第一讲1/5 ，2011-11-24 动传感器动传感器定义定义
2017-05-31 约2.1万字 5页立即下载
vibration test dut position picture procedure振动测试程序.pdf Vibration Test NOTest ConditionVibration Test Setting DUTPositionPicturePicture descriptionFrequency (Hz)Amplitudo Sweep RateTime duration test ( mm pp ) 1 1 3Bottom side of TV carton box on the base2021 oct/min30 minute # ) T U D ( 3021 oct/min30 minute t s e T r e4Back side of TV carton box on the
2025-04-22 约7.13千字 3页立即下载
Balance, Vibration, and Vibration Analysis - （平衡、振动和振动分析-）.pdf Fan Application ® FA/108-00 A technical bulletin for engi
2017-07-25 约2.18万字 4页立即下载
vibration_isolation_material_introduction 振动.ppt Vibration Shock Isolation Material Introduction Vibration Isolation Theory Resonance Example * 2nd Run 1st Run SDOF (P800) Aout-- Ain-- M K C FD = The frequency of the input force FN = Natural frequency of the system = 1/2π √(K/M) (P800) Peak become higher a
2017-05-27 约1.03千字 13页立即下载
Accelerated Vibration Testing Based on Fatigue （加速振动测试基于疲劳）.pdf ACCELERATED VIBRATION TESTING BASED ON FATIGUE DAMAGE SPECTRA Dr. A Halfpenny nCode International, 230 Woodbourn Road,
2017-07-25 约5.29万字 10页立即下载
测试听力部分问题以下表格7 test4.pdf TEST4 SECTION1Questions1-10 Questions1-6 Completetheformbelow. WriteNOMORETHANTHREEWORDSANDIDRANUMBERforeachanswer. HOMESTAYAPPLICATION ExampleAnswer Surname:Yuichini Firstname:1 :femaleNationality:Japanese Passportnumber:2Age:28years Presentaddress:Room21C,WillowCollege Lengthofhomestay:approx3 Cou
2025-06-03 约4.44万字 21页立即下载
测试听力节问题以下表格5 test4.pdf Test4 SECTION1Questions1-10 Questions1-10 Completetheformbelow. WriteNOMORETHANTHREEWORDSAND/ORNUMBERSforeachanswer. HOSTFAMILYAPPLICANT ExampleAnswer Name:JennyChan Presentaddress:Se
2025-06-02 约4.9万字 25页立即下载
UNDERSTANDING VIBRATION ANALYSIS In （理解振动分析）.pdf Understanding Vibration Analysis Vibration analysis is a useful method of performing all of the following: evaluating current machine condition diagnosing faults associated with operational machines monitoring and trendin
2017-08-29 约1.19万字 4页立即下载
Understanding Noise Vibration Control 噪声与振动控制.pdf Understanding Noise Vibration Control 了解噪声与振动控制 Type of Noise 噪声的类型 • There are 2 types of noise: – Air-borne noise 空气传播的噪音 – Structure-borne vibration, which will appear as airborne noise after being rad
2017-05-22 约1.21万字 25页立即下载
振动学系列(Vibration)6._Base_Excitation.docx 6. Base ExcitationNow that we can find the FRF for a mass/spring/damper system, let us tackle something slightly more complicated:Here, the system is excited by movement in the base, y(t). This is analagous to a car driving down the road – bumps in the road cause the contact patch of the tire to mo
2017-12-08 约3.26千字 8页立即下载
ADAMS Vibration 振动分析模块教程.ppt ADAMS/Vibration振动分析模块教程内容了解模块功能；了解Vibration与Linear模块的区别；使用Vibration模块进行虚拟振动试验及方案设计。 Vibration Issues Facing Engineers and Designers How comfortable is ride, whether in automobile, airplane, railcar, or off-road machinery? Will excitations in one part of system interact with another part of
2017-05-28 约4.12千字 25页立即下载
4-Vibration Analysis Procedure 振动的分析过程.ppt Vibration Analysis Procedure 振动的分析过程 Contents Mathematical Modeling,数学建模 Governing Equations （控制方程，基本方程）Derivation, 系统微分方程推导 Equations Solution,微分方程求解 Results Interpretation. 结果分析 Vibratory System A vibratory system is a dynamic system for which the variables such as the excitations (inputs) and r
2018-02-26 约1.57千字 8页立即下载
振动和非电离辐射 Vibration non-ionizing radiation.ppt Vibration non-ionizing radiation振动与非电离辐射历史上的共振事件 1831年，一支高歌凯旋的骑兵队雄赳赳、气昂昂地通过英国曼彻斯特附近的一座吊桥。洪亮而由节奏的“嗒、嗒、嗒”的马蹄声充分展示了队伍的雄风。然而，随着一声巨响，大桥突然倒塌，人马纷纷坠入河中，死伤惨重。 1906年的某一天，俄国首都彼得格勒有一支全副武装的沙皇军队正步伐整齐、不可一世地通过坚固无比，纵然跑过千军万马也难以撼动的爱妃华特大桥。可就在指挥官正洋洋得意地指挥军队前进时，突然桥身剧烈振动起来。然后伴着一声巨大的断裂声，大桥崩塌了。顿时，军官、士兵、辎重、马匹纷纷落水，马嘶人叫，狼狈不
2019-05-25 约1.27万字 79页立即下载
Understanding Bearing Vibration Frequencies（了解轴承振动频率）.pdf September 2003 Understanding Bearing Vibration Frequencies By Dave Felten 4. Rolling Element (ball, roller or tapered roller) Mechanical
2017-08-31 约2.32万字 3页立即下载
990 Vibration Transmitter Datasheet - 141612 振动变送器数据手册.pdf 990 Vibration Transmitter Datasheet Bently Nevada Machinery Condition Monitoring 141612 Rev. R Description The 990 Vibration Transmitter is intended
2023-08-29 约4.08万字 16页立即下载