期刊文献+
共找到5篇文章
< 1 >
每页显示 20 50 100
Experimental Mode and Vibration Comfort Analysis of High-Rise Glulam Building Floor Structure
1
作者 Yuhang He Rongzhuo Zhang +1 位作者 Yifan Zhang Zheng Wang 《Journal of Renewable Materials》 SCIE EI 2023年第6期2729-2743,共15页
In order to better meet the objective requirements of the use safety of the high-rise glulam building floor structure and the living comfort of the residents,the transient excitation,environmental excitation and frequ... In order to better meet the objective requirements of the use safety of the high-rise glulam building floor structure and the living comfort of the residents,the transient excitation,environmental excitation and frequency spectrum identification methods were used to carry out experimental modal test in-site on the three rooms numbered A,B and C of the same glulam structural building.The three rooms have different functions,different floor sizes and different floor supporting structures.The research results have shown that the first-order bending frequency of the floor structure of Room A is 27.50 Hz,the transverse second-order bending frequency is 34.75 Hz,the longitudinal second-order bending frequency is 53.25 Hz,and the first-order torsional frequency is 56.25 Hz.The reinforced wooden beam at the bottom of the floor of Room A increases the transverse stiffness of the floor structure,but does not offset the anisotropy caused by the longitudinally installed glulam floors.The fundamental frequency values of the floor structures of the three rooms numbered A,B,and C are 27.5,13 and 18 Hz,respectively.This has a relatively high innovation and reference significance for integrating the theory of structural dynamic characteristics with the dynamic testing technology,improving the design level of high-rise glulam structure buildings,and improving the living comfort of residents. 展开更多
关键词 Glulam building wooden floor experimental mode vibration comfort fundamental frequency
下载PDF
ODS & Modal Testing Using a Transmissibility Chain 被引量:1
2
作者 Brian Schwarz Patrick McHargue Mark Richardson 《Sound & Vibration》 2018年第2期2-7,共6页
In this paper, we show how Operating Deflection Shapes (ODS’s) andmode shapes can be obtained experimentally from measurements thatare made using only two sensors and two short wires to connect them to amulti-channel... In this paper, we show how Operating Deflection Shapes (ODS’s) andmode shapes can be obtained experimentally from measurements thatare made using only two sensors and two short wires to connect them to amulti-channel acquisition system. This new test procedure is depicted inFigure 1. Not only is the equipment required to do a test much more costeffective, but this method can be used to test any sized test article, especiallylarge ones. 展开更多
关键词 Fourier spectrum (DFT) Auto power spectrum (APS) Crosspower spectrum (XPS) Frequency Response Function (FRF) OperatingDeflection Shape (ODS) experimental mode Shape (EMA mode) Operationalmode Shape (OMA mode) Modal Assurance Criterion (MAC) ShapeDifference Indicator (SDI)
下载PDF
Experimental analysis of acousto-ultrasonic wave propagation mode in thin plate 被引量:2
3
作者 LIU Zhenqing HUANG Ruiju (Institute of Acoustics, Tongji University Shanghai 200092) 《Chinese Journal of Acoustics》 2000年第3期277-284,共8页
in the acousto-ultrasonic technique, a broadband ultrasonic wave is injected onto the surface at one location of the tested plate with the help of a longitudinal transducer and a receiving transducer is coupled to the... in the acousto-ultrasonic technique, a broadband ultrasonic wave is injected onto the surface at one location of the tested plate with the help of a longitudinal transducer and a receiving transducer is coupled to the same surface at another location. Thus, understanding the propagation characteristics of the ultrasonic wave is essential for successful application of the technique. It has been found that the dominant acousto-ultrasonic waves produced experimentally in thin plate are multi-mode Lamb waves. The broadband generation and detection of Lamb waves have been performed in two aluminum plates with different thickness using the acousto-ultrasonic method. 展开更多
关键词 WAVE mode experimental analysis of acousto-ultrasonic wave propagation mode in thin plate
原文传递
Simulation and experimental characterization of a dual-mode two-section amplified feedback laser with mode separation over 100 GHz 被引量:1
4
作者 潘碧玮 余力强 +2 位作者 陆丹 张莉萌 赵玲娟 《Chinese Optics Letters》 SCIE EI CAS CSCD 2014年第11期26-30,共5页
A tunable two-section amplified feedback laser, which employs an amplifier section as the integrated feedback cavity, is designed and fabricated for dual-mode operation with mode separation of 100 GHz. Detailed simula... A tunable two-section amplified feedback laser, which employs an amplifier section as the integrated feedback cavity, is designed and fabricated for dual-mode operation with mode separation of 100 GHz. Detailed simulations and experimental characterizations on the performance of the laser are presented. Promising dual-mode emission with continuous tuning range over 16 GHz(87.41–103.64 GHz) is experimentally demonstrated. 展开更多
关键词 mode Simulation and experimental characterization of a dual-mode two-section amplified feedback laser with mode separation over 100 GHz OVER
原文传递
Experimental Investigation of Macro-Bending Loss in Large Mode Area Photonic Crystal Fibers
5
作者 Joo Hin Chong Ping Shum 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期-,共2页
We measured macro-bending losses for two large mode area photonic crystal fibers. Experimental results show that macro-bending loss and loss window are dependent on the parameter d/∧ and number of air-holes ring in t... We measured macro-bending losses for two large mode area photonic crystal fibers. Experimental results show that macro-bending loss and loss window are dependent on the parameter d/∧ and number of air-holes ring in the cladding. 展开更多
关键词 PCF on BE as of experimental Investigation of Macro-Bending Loss in Large mode Area Photonic Crystal Fibers mode in
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部