14. starptautiskÄ konference 2012 - Latvijas JÅ«ras akadÄmija

More documents

Recommendations

Info

Proceedings of 14th International conference „Maritime Transport and Infrastructure - <strong>2012</strong>”Fig.7. The summarize (Nae) of acoustic impulses AE vs. Time at cooling and natural heatingNevertheless such approach is especially interesting in operation when fast return of a vehiclefrom one temperature environment in another allows practically applying in a mode of AE continuousmonitoring methods behind a condition of its composite components.Conclusions1. For the purpose of the approbation of a new approach to diagnostics of composite-madeelements the thermal loading tests for three types of objects were plunged: specimens of a coveringwith the brought defects and free of ones, aileron with known defect and an elevator with damagesfrom lightning stroke imitation, but free of defects, characteristic for composite materials, such asstarved spot, stratification or peeling.2. Thermal loading was carried out by two plans of experiment: heating of a covering ofobjects to temperature +70°С with the subsequent natural cooling till room temperature (+18°C) atcontinuous registration of the acoustic emission impulses sum (for specimens of two types and aileron)and keeping at negative temperature with the subsequent natural heating (also till +18°C) in a room(for an elevator).3. It is shown that at the AE sensor installation around a defective zone while at heating ofobject of research, it is observed intensive growth of AE-impulses, up to the completion of naturalcooling whereas in the free of defects zones it practically isn't present.4. It is shown that at long cooling of object of research without damages, characteristic forcomposite materials, but with external damages of a covering with the subsequent its natural heating,AE sensors also didn't register existence of such defects.5. An offered new approach of application of the AE monitoring of a condition of compositemadeelements allows to lead it in operation almost constantly for those vehicles, that occurs invarious temperature environments or conditions.References1. http://www.mak.ru/russian/investigations/2009/report_ra-22968.pdf.This work has been supported by the European Regional Development Fund within the project “Development ofan unmanned aircraft system and creation of the industrial prototypes of unmanned aerial vehicles forperforming the tasks of Latvian national economy” No.2010/0256/2DP/2.1.1.1.0/10/APIA/VIAA/07050
KEMPINSKItNt>...... /1--":-...... I j...... ...... I 9-77nm...... / I i 163"~0 nrning and also would have only 1.25 mflesto make northward. This seemed to makegood sense to me.I spoke next with Monty Featherstone."I have a feel'ing," he said, "that if Ifigure a heading which will be commonto all my glides and which will take meto the goal, I can't do very much betterthan this." He did concede that he mightneed to adjust his heading for his final."My heading will be 59 degrees," hedec'lared, "and I am well aware that thepoint from which I sha.l! start my finalwill be well south of tile task line." Ihad a feeling that Kevin might do a.hair better with his plan but I keQt mymouth shut.Finally, I had a word with ChuckPattoD. Looking ovcr his shoulder beforeSPeaking, he remarked, "I feel it in mybones that this lousy northetlY is goingto back during 'the next hOUl;" Qr so,whatever the met. man may think. I'mnot wasting a lot of my time fightipgmy way north in the early part of the"of----------:100..] 2.5 nrnrace when the wind is probably going toend blowing fmm the west." I asked himwhat he planned to do. With anotherglance OVer his shoulder, he told methat he would head due east on his firstglide. On subsequent glides, he wouldhead in the direction of the goal whenhe came out of his climb and then flysteady on Ilis compass reading untflhewas down to 2,000 feet. He reckoned thathe could locate HOWling Dog from a longwayotf by the well-known gap in theline of hills which lies just east of thefield. I had grave misgivings about hisplan but I thought it better not to voicethem.I saw the boys across the line andthen headed east with Kevin's trailer.When I reached Howling Dog, Kevin andMonty were on the ground. They told methat 'tlley had closed with the field onconverging courses and had landed simultaneOUsly.Quite a while later,. Chuckshowed up almost from the southward.All three had judged their finals with2-5 nmFEATHERSTONE/t ... //~ "/ I 9'79 nm_/ 1 +-.//'6'5 nm63'40 nm49
Page 1 and 2: LATVIJAS JŪRAS AKADĒMIJALJA PĒTN
Page 3: Proceedings of 14th International c
Page 7 and 8: Proceedings of 14th International c
Page 21 and 22: 20002001200220032004200520062007200
Page 71 and 72: Concentration, mg/m 3Proceedings of
Page 73 and 74: 0:001:002:003:004:005:006:007:008:0
Page 101 and 102:
Proceedings of 14th International c
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Air temperature, deg CWater tempera
Page 125 and 126:
Water level (+/-), centimetreProcee
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Mln. LtMln. LtProceedings of 14th I
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
show all

14. starptautiskÄ konference 2012 - Latvijas JÅ«ras akadÄmija

Create successful ePaper yourself

Delete template?

Save as template?

14. starptautiskÄ konference 2012 - Latvijas JÅ«ras akadÄmija