Miftakhov R N, Wingate D L
Department of Medical Physics and Engineering, UAE University, Al Ain, United Arab Emirates.
Med Eng Phys. 1994 Sep;16(5):406-15. doi: 10.1016/1350-4533(90)90007-u.
A biomechanical model and results of numerical simulation of the propagation of electromechanical waves of deformation along the small bowel are presented. The organ is modelled as a soft orthotropic cylindrical biological shell reinforced by orthogonally interwoven smooth muscle elements, embedded in a connective tissue network. The dynamic reaction starts as a response to the propagation of a depolarization wave along the smooth muscle layers. The muscle layers contract independently but in a coordinated way with the generation of active forces. The mechanical properties of the wall are assumed to be nonlinear. Deformations of the bioshell are finite. The governing system of equations is obtained and solved numerically. The finite-difference method of the second order accuracy over the time and space variables was used. The dynamics of strain distribution in the biological shell and shape changes are analysed.
本文提出了沿小肠传播的机电变形波的生物力学模型及数值模拟结果。该器官被建模为一个由正交交织的平滑肌元件加强的软正交各向异性圆柱形生物壳，嵌入结缔组织网络中。动态反应始于对去极化波沿平滑肌层传播的响应。肌肉层独立收缩，但以协同方式产生主动力。假定壁的力学性能是非线性的。生物壳的变形是有限的。得到了控制方程组并进行了数值求解。使用了在时间和空间变量上具有二阶精度的有限差分法。分析了生物壳中的应变分布动态和形状变化。
