David Hauer

• Ellingsen, Ståle; Hauer, David; Caroti, Mattia; Kosche, Florian; Vedholm, Kjetil & Brekke, Arild [Vis alle 7 forfattere av denne artikkelen] (2024). Structural mitigation measures to archaeological wooden Viking age sledges based on calibrated FEM models using advanced vibration measurements. Journal of Physics: Conference Series (JPCS). ISSN 1742-6588. doi: 10.1088/1742-6596/2647/25/252028. Fulltekst i vitenarkiv Vis sammendrag

  The Viking Ship Museum in Oslo, Norway, houses the world's largest collections of artefacts from the Viking era and holds the best-preserved Viking ships in the world. It is being expanded to provide new exhibition areas, improving both the visitor experience and the physical conditions for the objects on display. Three extremely fragile alum treated sledges are secured onsite as they are considered too fragile to move off the premisses. Finite element models are developed as a tool for understanding the sledges' static and dynamic behaviour and the models are used to design effective mitigation measures applied to the sledges' existing support systems. The models are established using highly detailed geometry 3D scans. They are dynamically calibrated using advanced vibration measurements identifying the sledges' eigenfrequencies with corresponding mode shapes. The models are also calibrated using load deformation measurements with controlled loads applied to the sledges' support systems.

• Hauer, David; Ellingsen, Ståle; Vedholm, Kjetil; Kosche, Florian & Brekke, Arild (2023). New methodologies on the analysis of archaeological wooden structures. Establishing protective measures of Viking age ships and sledges prior to construction work and relocation processes. Proceedings of the 15th ICOM-CC Group on Wet Organic Archaeological Materials Conference: Mainz 2023. International Council of Museums Committee for Conservation (ICOM-CC). s. 48–56. Fulltekst i vitenarkiv Vis sammendrag

  The Viking Ship Museum in Oslo, part of the Museum of Cultural History, University of Oslo, is under reconstruction. The existing museum will be considerably enlarged, and the spectacular ships and sledges will be transferred into the new adjacent building. During the construction work and the relocation process, the objects will be exposed to deformations and vibration. This paper describes the work carried out to meet a satisfactory level of object protection during the operations. This includes relevant conservation history, current storage situation, object geometry, material composition, weight, structural and dynamic behaviour, and shows how this information is used to tailor an adequate protection strategy for the large and complex archaeological wooden structures in question.

• Colson, Amandine; Hauer, David; Gamstedt, Kristofer & Schofield, Elanor (2019). KEEPING AN EYE ON CONSERVED SHIPS, WHY IMPLEMENT LONG-TERM MONITORING? Proceedings of the 14th ICOM-CC Group on Wet Organic Archaeological Materials Conference: Portmouth 2019. International Council of Museums Committee for Conservation (ICOM-CC). s. 276–280. Fulltekst i vitenarkiv Vis sammendrag

  Over the last years, several museums have begun to investigate the long-term maintenance of their ships (Vasa, Mary Rose, Arles-Rhône 3, Oseberg and Bremen Cog) and attempt to seek solutions on how best to monitor the structural changes occurring. It is increasingly clear that more emphasis must be placed on long-term preservation based on monitoring, which is more challenging than previously expected and therefore requires more research. After the pioneer work done at the Vasa and the Mary Rose, other museums have started to take a closer look at their ships, and in particular, the deformation processes. Since 2014, the German Maritime Museum has been working on a three-dimensional measuring system for the long-term deformation monitoring of the Bremen Cog, a 14th century vessel on display since 2000. Quickly realizing that a few projects were dealing with the same issues, we decided to reinforce networking between the museums and associated partners. This was the foundation stone for the creation of a European working group “Monitoring of Preserved Ships” MoPS). The first meeting held in June 2017 in Bremerhaven. The group currently consists of 17 research institutes from nine European countries. The members come from various disciplines and work together informally on common topics such as 3D protocols, assessing data, developing new tools, and joining forces for funding research projects either in each country or on a European level.

• Hauer, David; Colson, Amandine; Hastedt, Heidi & Gamstedt, Kristofer (2019). MONITORING STRUCTURAL CHANGE OF LARGE, COMPLEX ARCHAEOLOGICAL WOODEN OBJECTS - APPLICATION OF FIXED TARGET PHOTOGRAMMETRY. Proceedings of the 14th ICOM-CC Group on Wet Organic Archaeological Materials Conference: Portmouth 2019. International Council of Museums Committee for Conservation (ICOM-CC). s. 287–296. Fulltekst i vitenarkiv Vis sammendrag

  There has been an increasing awareness of challenges associated with the preservation management of large complex wooden structures. The use of 3D technology for monitoring structural stability of large wooden structures is suitable to uncover underlying problems at an early stage and limit damage over time. This study is part of a research project on preventive conservation within the framework of the Saving Oseberg project. The main objective of this part of the project is to identify relevant behavioural patterns of complex wooden structures resulting from the effects of fluctuating climate. Such findings can be helpful in preventive conservation, in terms of identifying the most pressing needs for the structure, such as the design of an improved support structure, better climate control or re-conservation of certain parts of the structure. In this paper, we investigate the suitability and limitations of fixed target photogrammetry as a tool for monitoring structural change of large, complex archaeological wooden objects in a museum setting. To obtain required results, the measuring procedure needs to be adapted to the object within its surrounding. This includes assessing the accuracy, precision, special considerations given by the subject material, in situ considerations such as limited access to the objects, lack of sufficient working space around the objects, and the use of reference points and scales. We will also point out how deformation, measured by fixed target photogrammetry, can be contextualized using other methodologies such as static and dynamic load distribution, and their correlations with climate monitoring.

• Dionisi-Vici, P; Braovac, Susan; Hauer, David & Jensen, Maria Malherbes (2018). Measuring stress levels of archaeological samples from the Oseberg ship under fluctuating relative humidity - preliminary results. I Williams, Emily & Hocker, Emma (Red.), Proceedings of the 13th ICOM-CC Group on Wet Organic Archaeological Materials Conference: Florence 2016. International Council of Museums Committee for Conservation (ICOM-CC). ISSN 9789290124368. s. 333–337. Fulltekst i vitenarkiv Vis sammendrag

  Long-term effects of climate fluctuations are very important to consider regarding preservation of archaeological wooden artifacts. Since 2009, a hygromechanical monitoring has been carried out on the Oseberg ship in the Viking Ship Museum (VSH) in Oslo. The monitoring has showed a measurable warping response of the oak planks to the uncontrolled relative humidity fluctuations in the museum. However, one of the missing pieces of information for an improved understanding of the hygro-mechanical behavior of the ship is the measurement of the stress levels potentially absorbed by the restrained planks during relative humidity (RH) fluctuations. Here, a methodology aiming to contribute to this analysis is proposed and the first results of the tests are presented. Measurements were carried out in a climate chamber, simulating the average extremes in RH commonly measured at VSH (30% and 75% RH). The experimental results will allow us to determine realistic climatic set points for the plans of a new museum complex.

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• Hauer, David & Biørnstad, Lasse (2025). I dette lukkede kammeret står noen av Norges skjøreste og flotteste skatter. [Internet]. forskning.no. Fulltekst i vitenarkiv
• Biørnstad, Lasse & Hauer, David (2025). Siste tokt for vikingskipene. [Internet]. forskning.no. Fulltekst i vitenarkiv
• Hauer, David & Tunheim, Helga (2025). Prøveflytt av Osebergskipet. [TV]. NRK, Dagsrevyen. Fulltekst i vitenarkiv
• Hauer, David (2025). Vikingtid på flyttefot. Fulltekst i vitenarkiv
• Hauer, David (2024). Mechanical research applied to overall structural assessment of large archaeological wooden objects from the Viking age. Fulltekst i vitenarkiv
• Hauer, David (2024). På vei mot nytt Vikingtidsmuseum. Fulltekst i vitenarkiv
• Hauer, David (2024). Work starts on new museum of the Viking age - Head engineer outlines plans for priceless Viking ships. [Internet]. The Viking Herald. Fulltekst i vitenarkiv
• Hauer, David (2023). Sikring og flytting av skip og sleder på Vikingskipshuset Forberedelser til nytt Vikingtidsmuseum. Fulltekst i vitenarkiv
• Hauer, David (2023). Stålrigger på 40 tonn skal skåne vikingskipene under byggingen av nytt museum. Forskerforum. ISSN 0800-1715. Fulltekst i vitenarkiv
• Hauer, David (2023). Vikingskipene trygge i sikkerhetsrigger fra Nordsjøen. [Internet]. https://www.vikingtidsmuseet.no/. Fulltekst i vitenarkiv
• Hauer, David (2022). The SGO Project at the Vikingship museum Safeguarding ships and sleds for storms to come and prepare long term preservation measures. Fulltekst i vitenarkiv
• Hauer, David (2022). Klokkemakeren. I Rorgemoen, Dag (Red.), Jarand Åsmundsson Rønjom. "Den største Kunstner i Øvre-Tellemarken". Stiftinga Vest-Telemark Museum. ISSN 9788269014280. s. 62–80. Fulltekst i vitenarkiv
• Hauer, David (2022). Skip og sleder på Vikingskipshuset, Oslo. Overføringsverdi vedrørende sikringstiltak og relokasjon planlagt ved Vikingskibsmuseet i Roskilde. Fulltekst i vitenarkiv Vis sammendrag

  NKF netværksgruppen Vanddrukne Materialer 2022. Vikingeskibsmuseet i Roskilde ved Jesper Stub Johnsen inviterer til ekspertgruppemøde under temaet: Hvordan flytter og udstiller vi bedst vores vikingeskibe?

• Colson, Amandine & Hauer, David (2022). Excavated, conserved, presented, ... forgotten? Ships in museums and their long-term preservation. Fulltekst i vitenarkiv
• Hauer, David (2022). Vi må sikre at vikingskipene og vikingsledene ikke blir skadet i byggeperioden. [Journal]. Uniforum. Fulltekst i vitenarkiv
• Hauer, David & Klesty, Victoria (2022). Millennium-old Viking ships shored up for Oslo move. [TV]. Reuters. Fulltekst i vitenarkiv
• Hauer, David; Glørstad, Håkon & Carlsen, Marianne Rustad (2022). Praktsledene fra Osebergfunnet flyttes. [TV]. nrk. Fulltekst i vitenarkiv
• Hauer, David (2021). Sikring og bevaring av skip og sleder på Vikingskipshuset. Fulltekst i vitenarkiv
• Hauer, David & Smeland, Kari (2020). I 2025 opnar nytt vikingtidsmuseum. David Hauer passar på at ferda til vikingskipa dit blir trygg. [Journal]. Vest-Telemark Blad. Fulltekst i vitenarkiv
• Hauer, David (2019). Assessment of structural response to seasonal climate variations of large, complex archaeological wooden objects. Fulltekst i vitenarkiv
• Hauer, David (2019). Gokstadskipet fikk seks nye støtter for å hindre kollaps. [Journal]. Uniforum. Fulltekst i vitenarkiv
• Hauer, David & Mauren, Arnfinn (2019). Gokstadskipet slår sprekker og må støttes opp for å unngå kollaps. [Journal]. Aftenposten. Fulltekst i vitenarkiv
• Hauer, David (2018). New approach to structual assessment of large, complex wooden objects. Fulltekst i vitenarkiv
• Hauer, David (2018). Wood technology applied in the Saving Oseberg project. Fulltekst i vitenarkiv
• Hauer, David (2018). Preventive conservation at the Viking Ship Museum. Fulltekst i vitenarkiv
• Hauer, David (2018). Developments on the monitoring of large archaeological wooden structures. Fulltekst i vitenarkiv
• Hauer, David (2018). Vikingskattene brytes ned i Vikingskipshuset. [Radio]. Tønsbergs Blad. Fulltekst i vitenarkiv Vis sammendrag

  Podcast: Viking spesial

• Hauer, David (2018). Structural monitoring of the Viking ships at the Museum of Cultural History. Fulltekst i vitenarkiv
• Hauer, David & Klokkernes, Torunn (2018). Vikingskip veies for første gang. [Internet]. nrk. Fulltekst i vitenarkiv
• Hauer, David (2017). Deformation Monitoring of conserved ships. Fulltekst i vitenarkiv
• Braovac, Susan; Hauer, David; Steindal, Calin Constantin; McQueen, Caitlin; Andriulo, Fabrizio & McHale, Emily (2016). Oseberg-konserveringen for dummies. Museumsnytt. ISSN 0027-4186. Fulltekst i vitenarkiv
• Hauer, David (2016). Slår alarm om vikingskip: - Har oppdaget nye sprekker i skipene. [Internet]. https://www.nrk.no/. Fulltekst i vitenarkiv
• Hauer, David; Andriulo, Fabrizio; McQueen, Caitlin; Braovac, Susan; Steindal, Calin Constantin & Kutzke, Hartmut [Vis alle 7 forfattere av denne artikkelen] (2015). Håper at vikingskattene kan reddes. [TV]. NRK Dagsrevuen. Fulltekst i vitenarkiv
• Hauer, David (2013). Fuktige prognoser og luftige tiltak for eldre bygningskultur i tre. Fulltekst i vitenarkiv
• Hauer, David (2008). Building ecology. Bio deterioration and humidity dynamics in built heritage. Fulltekst i vitenarkiv
• Hauer, David (2008). Conservation of arms and armour. Fulltekst i vitenarkiv
• Hauer, David (2008). Bruk av ikkepigmentert overflatebehandling ved konservering av trebygninger, med vekt på steinkulltjære og steinkulltjærederivater. Fulltekst i vitenarkiv

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