## 8 Conclusions  
The main original achievement of this work is the analytical and numerical research methodology established for testing the strength of multibody systems of intermodal platforms. The work shows that the methodology can be used to test various platform systems with removable components and joints connecting them. This part of the modular object absorbs all external and internal forces from the platform loads and transforms them into reaction forces of the constraints that attach the platform to the vehicle. An additional difficulty in static and dynamic tests of such systems is the unknown load distribution across individual joints and platform components. The problems with testing the strength of such a system increase when it is necessary to take into account friction and the impact of clearances between moving components. Correctly representing these phenomena in numerical simulations is a serious scientific challenge. The main work objectives planned in this study were achieved. The original achievements presented in this study are as follows:A methodology for selecting substitute parameters--appropriate shape of platform components, stiffness, and above all, safe durability--describing the multi-segment model of the prototype platform; - Verified through analytical research, multi-segment models built of rigid bodies for MB simulation and results of dynamic analysis in models of the complex structural system of the intermodal platform in different configurations during various loading/unloading operations; - Demonstration of the usefulness of different classes of FEM models in the study/design phase of complex/multibody structures; - Possibilities of numerical shaping of structures both in the initial and more advanced phase of creating a new structure--a prototype that will meet the adopted functional and operational assumptions, kinematic and strength criteria, together with the limitations resulting from industry standards and regulations. The following conclusions can be drawn based on the research carried out:  
1. The structural modifications and the strength reserve assumed in numerical tests, introduced in a single 10-foot module of platform, allowed the increase in the range of potential applications of intermodal systems built on their basis. The possibility of building any configurations of the planned intermodal platform was demonstrated;
2. Preliminary tests of 10-foot platforms without side joints in simplified shell-beam models and subjected to limit loads showed that it was possible to meet the adopted technical assumptions;
3. Based on the results of multi-variant FEM numerical tests, a structural design of the prototype 10-foot platform-container with joints and its prototype version were developed. It was shown that even in numerical models with simplified representation of joints between platform components, it is possible to meet the adopted technical assumptions;
4. Based on the results of the platform strength tests in the FEM global solid models, in which the most important areas of movable connections of the components of the tested structure were represented in detail, separate models of movable joints were built, which will be tested in laboratory conditions;
5. The results of these tests will be used to collect validation data for improving the numerical models of the platform and to develop final structural and detailed design documentation for the construction of prototype structures and certification of platforms for intermodal transport;
6. Due to the mobility of the presented system, it will be necessary to use a quick and easy-to-implement methodology for testing such platforms in various operational configurations and different external loads after its industrial implementation. Based on a comparative analysis of the research results in the FEM models of the platform with varying degrees of accuracy in representing the areas of movable joints, the following was found:  
1.