Work on improving the Lawrence Livermore DYNA3D code to allow it to accurately model hypervelocity impact is presented. The unmodified version of DYNA3D was tested, results showed that improvements were required in three main areas: material modelling, the element erosion criterion, the ability to m
The development of lagrangians for biological models
โ Scribed by Gregory H. Paine
- Book ID
- 104272438
- Publisher
- Springer
- Year
- 1982
- Tongue
- English
- Weight
- 526 KB
- Volume
- 44
- Category
- Article
- ISSN
- 1522-9602
No coin nor oath required. For personal study only.
โฆ Synopsis
A modern theory of the calculus of variations is used to form necessary and sufficient conditions for the existence of a Lagrangian representation of a system of first-order ordinary differential equations. There exists a theorem to the effect that when a system of ordinary differential equations is variationally self-adjoint, the fulfillment of such conditions is guaranteed. In addition, self-adjointness allows establishment of an algorithm by which a Lagrangian for the system may be explicitly constructed. Examples in mathematical biology are given to illustrate the use of the stated theorem.
๐ SIMILAR VOLUMES