Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Modelling the biomechanical behaviour of growing trees at the forest stand scale. Part I: Development of an Incremental Transfer Matrix Method and application to simplified tree structures. | Ann. For. Sci. 61 2004 263-275 INRA EDP Sciences 2004 DOI forest 2004019 263 Original article Modelling the biomechanical behaviour of growing trees at the forest stand scale. Part I Development of an Incremental Transfer Matrix Method and application to simplified tree structures Philippe ANCELINa b Thierry FoURCAUDa b Patrick LACa a Laboratoire de Rhéologie du Bois de Bordeaux UMR CNRS INRA Université Bordeaux I Domaine de l hermitage 69 route d Arcachon 33612 Cestas Cedex France b Programme Modélisation des Plantes CIRAD-AMIS - AMAP - TA40 PS2 boulevard de la Lironde 34398 Montpellier France Received 18 July 2002 accepted 23 April 2003 Abstract - Stem straightness defects are often associated with heterogeneities in wood structure in relation to tree tropisms. This paper presents a numerical model which is dedicated to simulate the biomechanical behaviour of growing trees. A simplified description of tree structure separating trunk and crown has been used in order to perform future calculations at the stand level. The model is based on the Transfer Matrix Method which was adjusted under an incremental form to compute the evolution of trunk biomechanics during growth. Deflections due to selfweight distribution and straightening up reactions which are associated with maturation strains of reaction wood cells were considered. This model has been implemented in the CAPSIS software. Numerical results were compared to those obtained by the software AMAPpara which is more applicable to the whole tree architecture level. Limits of the simplified description which will be useful for studies at stand level are discussed. biomechanics negative-gravitropic response reaction wood stem shape growth stresses Résumé - Modélisation du comportement biomécanique d arbres en croissance à l echelle du peuplement forestier. Partie I développement d une Méthode Incrémentale des Matrices de Transfert et application au cas d arbres simplifiés. Les défauts de rectitude des tiges
