Changing Law of Mechanical Responses of Herniated Lumbar Intervertebral Disc under Automobile Vibration
10.16156/j.1004-7220.2024.06.007
- VernacularTitle:汽车振动下突出腰椎间盘力学响应的变化规律
- Author:
Tongju JIA
1
;
Jun LIU
;
Xiaojun LI
;
Bo DAI
;
Ke WEI
;
Qing LIU
;
Chunqiu ZHANG
Author Information
1. 天津理工大学 天津市先进机电系统设计与智能控制重点实验室,天津 300384;天津理工大学 机电工程国家级实验教学示范中心,天津 300384
- Publication Type:Journal Article
- Keywords:
lumbar intervertebral disc herniation;
vibration;
constitutive modelling;
viscoelasticity;
dynamic creep
- From:
Journal of Medical Biomechanics
2024;39(6):1058-1065
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the changing law of mechanical responses of herniated lumbar intervertebral disc under automobile vibration.Methods Herniated and healthy intervertebral disc specimens were made using the sheep lumbar spines.The specimens were compressed in flexion/vertical posture to simulate the stress state of the driver's lumbar spine in different sitting positions,and then the creep experiments were carried out on this basis.The viscoelastic mechanical behaviour of lumbar intervertebral discs during dynamic creep was described using a standard linear solid model,the dynamic creep strain,strain rate,elastic modulus were calculated,and the physical significance of the constitutive equations was analyzed.Results The dynamic creep strain of the herniated lumbar disc specimen was significantly larger than that of the healthy specimen,while the amplitude was basically unchanged;the vibration acceleration had basically no effects on the dynamic creep strain,while it had a significant effect on the amplitude;the forward flexion mode had a slight effect on the dynamic creep strain,while it had a significant effect on the amplitude.The results of the present constitutive equation calculations were in agreement with the results of the experimental tests.Conclusions This study provides important theoretical guidance for the prevention of low back pain diseases in car drivers.
