?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Heavy+vehicle+suspensions+%3A+testing+and+analysis&rft.creator=Davis%2C+Lloyd+Eric&rft.subject=heavy+vehicle%2C+truck%2C+lorry%2C+suspension+test%2C+Vehicle+Standards+Bulletin+11+(VSB+11)%2C+suspension+health%2C+suspension+model%2C+dynamic+force%2C+wheel+force%2C+pavement+force%2C+tyre+force%2C+spatial+repeatability%2C+spatial+repetition%2C+road+roughness%2C+pavement+roughnes&rft.subject=surface+roughness%2C+suspension+metrics%2C+on-board+mass%2C+heavy+vehicle++telematics%2C+tamper+evidence%2C+tamper+metrics%2C+load+sharing%2C+dynamic+load+sharing%2C++heavy+vehicle+suspension+frequency%2C+heavy+vehicle+suspension+wavelength%2C+heavy+vehicle+suspension+model&rft.description=Transport+regulators+consider+that%2C+with+respect+to+pavement+damage%2C+heavy+vehicles+(HVs)+are+the+riskiest+vehicles+on+the+road+network.+That+HV+suspension+design+contributes+to+road+and+bridge+damage+has+been+recognised+for+some+decades.+This+thesis+deals+with+some+aspects+of+HV+suspension+characteristics%2C+particularly+(but+not+exclusively)+air+suspensions.+This+is+in+the+areas+of+developing+low-cost+in-service+heavy+vehicle+(HV)+suspension+testing%2C+the+effects+of+larger-than-industry-standard+longitudinal+air+lines+and+the+characteristics+of+on-board+mass+(OBM)+systems+for+HVs.+All+these+areas%2C+whilst+seemingly+disparate%2C+seek+to+inform+the+management+of+HVs%2C+reduce+of+their+impact+on+the+network+asset+and%2For+provide+a+measurement+mechanism+for+worn+HV+suspensions.+A+number+of+project+management+groups+at+the+State+and+National+level+in+Australia+have+been%2C+and+will+be%2C+presented+with+the+results+of+the+project+that+resulted+in+this+thesis.+This+should+serve+to+inform+their+activities+applicable+to+this+research.+A+number+of+HVs+were+tested+for+various+characteristics.+These+tests+were+used+to+form+a+number+of+conclusions+about+HV+suspension+behaviours.+Wheel+forces+from+road+test+data+were+analysed.+A+%E2%80%9Cnovel+roughness%E2%80%9D+measure+was+developed+and+applied+to+the+road+test+data+to+determine+dynamic+load+sharing%2C+amongst+other+research+outcomes.+Further%2C+it+was+proposed+that+this+approach+could+inform+future+development+of+pavement+models+incorporating+roughness+and+peak+wheel+forces.+Left%2Fright+variations+in+wheel+forces+and+wheel+force+variations+for+different+speeds+were+also+presented.+This+led+on+to+some+conclusions+regarding+suspension+and+wheel+force+frequencies%2C+their+transmission+to+the+pavement+and+repetitive+wheel+loads+in+the+spatial+domain.+An+improved+method+of+determining+dynamic+load+sharing+was+developed+and+presented.+It+used+the+correlation+coefficient+between+two+elements+of+a+HV+to+determine+dynamic+load+sharing.+This+was+validated+against+a+mature+dynamic+loadsharing+metric%2C+the+dynamic+load+sharing+coefficient+(de+Pont%2C+1997).+This+was+the+first+time+that+the+technique+of+measuring+correlation+between+elements+on+a+HV+has+been+used+for+a+test+case+vs.+a+control+case+for+two+different+sized+air+lines.+That+dynamic+load+sharing+was+improved+at+the+air+springs+was+shown+for+the+test+case+of+the+large+longitudinal+air+lines.+The+statistically+significant+improvement+in+dynamic+load+sharing+at+the+air+springs+from+larger+longitudinal+air+lines+varied+from+approximately+30+percent+to+80+percent.+Dynamic+load+sharing+at+the+wheels+was+improved+only+for+low+air+line+flow+events+for+the+test+case+of+larger+longitudinal+air+lines.+Statistically+significant+improvements+to+some+suspension+metrics+across+the+range+of+test+speeds+and+%E2%80%9Cnovel+roughness%E2%80%9D+values+were+evident+from+the+use+of+larger+longitudinal+air+lines%2C+but+these+were+not+uniform.+Of+note+were+improvements+to+suspension+metrics+involving+peak+dynamic+forces+ranging+from+below+the+error+margin+to+approximately+24+percent.+Abstract+models+of+HV+suspensions+were+developed+from+the+results+of+some+of+the+tests.+Those+models+were+used+to+propose+further+development+of%2C+and+future+directions+of+research+into%2C+further+gains+in+HV+dynamic+load+sharing.+This+was+from+alterations+to+currently+available+damping+characteristics+combined+with+implementation+of+large+longitudinal+air+lines.+In-service+testing+of+HV+suspensions+was+found+to+be+possible+within+a+documented+range+from+below+the+error+margin+to+an+error+of+approximately+16+percent.+These+results+were+in+comparison+with+either+the+manufacturer%E2%80%99s+certified+data+or+test+results+replicating+the+Australian+standard+for+%E2%80%9Croad-friendly%E2%80%9D+HV+suspensions%2C+Vehicle+Standards+Bulletin+11.+OBM+accuracy+testing+and+development+of+tamper+evidence+from+OBM+data+were+detailed+for+over+2000+individual+data+points+across+twelve+test+and+control+OBM+systems+from+eight+suppliers+installed+on+eleven+HVs.+The+results+indicated+that+95+percent+of+contemporary+OBM+systems+available+in+Australia+are+accurate+to+%2B%2F-+500+kg.+The+total+variation+in+OBM+linearity%2C+after+three+outliers+in+the+data+were+removed%2C+was+0.5+percent.+A+tamper+indicator+and+other+OBM+metrics+that+could+be+used+by+jurisdictions+to+determine+tamper+events+were+developed+and+documented.+That+OBM+systems+could+be+used+as+one+vector+for+in-service+testing+of+HV+suspensions+was+one+of+a+number+of+synergies+between+the+seemingly+disparate+streams+of+this+project.&rft.publisher=Queensland+University+of+Technology&rft.date=2010&rft.type=Thesis&rft.format=application%2Fpdf&rft.relation=https%3A%2F%2Feprints.qut.edu.au%2F34499%2F1%2FLloyd_Davis_Thesis.pdf&rft.rights=free_to_read&rft.relation=Davis%2C+Lloyd+Eric+(2010)+Heavy+vehicle+suspensions+%3A+testing+and+analysis.+PhD+thesis%2C+Queensland+University+of+Technology.&rft.id_number=https%3A%2F%2Feprints.qut.edu.au%2F34499%2F&rft.identifier=Faculty+of+Built+Environment+and+Engineering