Measurement of aspherical surfaces using test plate and computer generated hologram (CGH)

2002 ◽  
Author(s):  
Feenix Pan ◽  
J. Burge ◽  
D. Anderson
Keyword(s):  
Test Plate ◽  
Computer Generated Hologram

Computer-generated hologram of asymmetry fractional Fourier transform

2005 ◽  
Author(s):  
Zhaoxuan Sheng ◽  
Hongxia Wang ◽  
Junfa He ◽  
Youjie Zhou ◽  
Jun Wang ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Fractional Fourier Transform ◽  
Computer Generated Hologram

New method for making array of computer-generated hologram

2000 ◽  
Author(s):  
Toshio Honda ◽  
Tomiko Suzuki ◽  
Masami Takano
Keyword(s):  
New Method ◽  
Computer Generated Hologram

Effects of Roughness Strip and Acoustic Sensor Height on Subsonic Boundary Layer by Experiment

2013 ◽  
Vol 421 ◽  
pp. 459-463
Author(s):  
Ning Zong ◽  
Guang Jun Yang ◽  
Jing Sun
Keyword(s):  
Boundary Layer ◽  
Flow Structure ◽  
Dynamic Test ◽  
Acoustic Sensor ◽  
Body Type ◽  
Test Plate ◽  
Spectrum Measurement ◽  
Layer Flow ◽  
Analysis System ◽  
Wind Speed Measurement

According to the measurement requirements of acoustic fatigue load on aft fuselage structure and the external installation restriction of the acoustic sensor on aircraft surface, an acoustic sensor is installed on the silencing jet test plate with reference to body type of the real aircraft. A dynamic test and analysis system combined hot wire wind speed measurement and acoustic spectrum measurement is built up for the combined experiments with different acoustic sensor height and various boundary layer flow structure at subsonic flow condition. Turbulence development of different boundary layer is analyzed. The test result can be coordinated with the local measurement to aircraft flow structure so as to estimate the effect of acoustic sensor on the flow field.

Study on Reinforce Saturated Soft Clay Foundation with Dynamic Consolidation by Drainage

2013 ◽  
Vol 438-439 ◽  
pp. 1171-1175
Author(s):  
Zhi Li Sui ◽  
Zhao Guang Li ◽  
Xu Peng Wang ◽  
Wen Li Li ◽  
Tie Jun Xu
Keyword(s):  
Pore Water ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Soft Clay ◽  
Soil Layer ◽  
Good Effect ◽  
Loading Test ◽  
Test Plate ◽  
Dynamic Consolidation ◽  
Saturated Soft Clay

Dynamic consolidation method has been widely used in improving soft land, but always inefficient to saturated soft clay land, which is hard to improve, and even leads to rubber soil. Dynamic and drain consolidation method will deal with it well, with drainage system, pore-water can be expelled instantly from saturated soft clay as impacting. The pore-water pressure and earth pressure test in construction, the standard penetration test, plate loading test, geotechnical test after construction, which are all effective methods for effect testing. There is a comprehensive detection through different depth of soil layer with different detecting means on construction site. The results show that improving saturated soft clay land with dynamic and drain consolidation method has obtained good effect, and the fruit can be guidance for such construction in the future.

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