## 5 Conclusions and Scopes of Further Development  
In this paper, a unique finite element simulation methodology was described to predict the final level of vibration inside car seated human body. From the outputs of this research work, the following conclusions can be drawn:  
* Finite element method can be used effectively to simulate the entire human body to predict the acceleration and frequency values at different points of a car-seated human body. Numerous combinations of different input parameters can be chosen for the analysis work, and the greater the numbers of parameters considered, more realistic and accurate the outputs that can be obtained from the results.
* Human portions can be represented by ellipsoidal segments and bone-muscle structure can be modelled through the concept of matrix-fibre system to define the shape and size-specific stiffness data. The stiffness values calculated by this method have a higher degree of practical feasibility compared with gathering the stiffness values from hypothetical database.
* This unique simulation methodology is able to predict the peak acceleration values and average frequency magnitude inside the segments of car-seated human in a justified way. More detailed investigations of the human and automotive parameters are required in order to minimize the frequency peak values.  
An enormous scope of future development is there to take this research work to an advanced level. Firstly and most importantly, a longer simulation running time will be beneficial to characterize the level of accelerations and frequency inside human parts in a better way. In this span of research work, 10 s simulation time was considered, which was useful in characterizing the acceleration and frequency levels during the accelerating period of non-racer cars. Secondly, damping and stiffness data can be calculated and assigned in a more accurate way. It was observed that the frequency curves from this simulation output became steady over time; therefore, the effects of damping and stiffness parameters worked as expected, and more realistic damping and stiffness properties would evidently show more convincing frequency curves. Thirdly, association of car seat to the developed human model and assigning the mating interfaces between seat and human body would potentially reduce the level of vibration inside the whole human-seat assembly. If the viscoelastic and hyperelastic material properties of an automotive seat foam cushion are modelled and the entire human-seat assembly is excited with forced vibration as per a real life condition, the obtained simulation results will be in a more convincing shape when compared with the experimental test data.  
On the basis of all these discussions, it can be concluded that this unique biodynamic simulation technique exhibited reasonable values of all the desired outputs. Thus, the present research work is headed towards the right direction and this unique methodology with further refinement can successfully be executed to anticipate the accelerations and frequencies inside a car-seated human body of different ages, shapes, and genders. As explained earlier, this technique can help to substitute the time-consuming and costly real life vibration testing method for different human segments in various industries with favourable and non-favourable operating scenarios where human entities are exposed to machinery pulsation.  
**Author Contributions:** Conceptualization, P.M.; methodology, P.M.; finite element analysis, P.M.; validation, P.M. and S.A.; gathering data for validation, P.M.; writing--original draft preparation, P.M.; writing--review and editing, S.A.; supervision, S.A. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This research received no external funding.  
**Conflicts of Interest:** The outlined unique simulation technique presented in this research paper has no conflict of interest.