String Transport System Two-Level Truss Rigidity
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Solution Overview
Problem
Existing string transport systems, such as those by Yunitski, face issues with insufficient rigidity and dynamic stability in their track structures, particularly affecting the transportation of heavy goods and limiting their speed and load capacity.
Innovation Solution
The proposed string transport system incorporates a two-level trussed track structure with prestressed rail cords and zigzag-oriented rod elements forming triangles, where the distance between junction units and rail cords is a multiple of the distance between supports, and the assembly connection of the transverse beam with the support is made as a pivot lever, allowing for increased rigidity and dynamic stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a two-level string trussed track structure is used, then the load capacity and traffic performance are improved, but the rigidity of the track structure becomes insufficient due to the significant height relative to the width of the wheel track
Solution Approach 1:
The patent introduces transverse beams that span across the two levels of the track structure, adding a third dimension to the structural system. These transverse beams create additional structural planes that intersect with the vertical rod elements, forming a three-dimensional trussed configuration that significantly increases torsional rigidity and lateral stability without compromising the vertical load-bearing capacity.
Solution Approach 2:
The track structure combines multiple materials with complementary properties: prestressed concrete for compressive strength and durability, steel rod elements for tensile strength and flexibility, and composite damping materials for vibration reduction. This composite construction allows the structure to achieve high rigidity and load capacity while maintaining dynamic stability.
2Adaptability or versatility
If the height of the track structure is increased to accommodate vehicles, then the vehicle height is accommodated, but the dynamic stability of the track structure in spans between supports is reduced
Solution Approach 1:
The patent incorporates movable joint elements and damping mechanisms that allow the track structure to dynamically adapt to vehicle loads and vibrations. The joint elements can deflect and rotate within controlled ranges to absorb impact energies, while damping materials viscoelastically dissipate vibration energies, maintaining dynamic stability despite the increased height.
Solution Approach 2:
The transverse beams act as intermediary structural elements that connect the two levels of the track structure, distributing loads across multiple support points and reducing the span length effect. These intermediaries stabilize the overall structure by creating a rigid framework that maintains geometric stability under dynamic loading conditions.
3Stability of the object's composition
If rigid supports are used to ensure stability, then the structural stability is improved, but the ability to accommodate thermal expansion and dynamic displacements is reduced
Solution Approach 1:
The support structure is divided into multiple segments with flexible joints between them, allowing each segment to independently expand or contract in response to thermal changes. The movable joint elements enable relative displacement between supports while maintaining overall structural stability, accommodating thermal expansion without compromising the rigid track structure.
Solution Approach 2:
The patent uses materials with temperature-dependent properties and damping coefficients that change with temperature and loading conditions. The damping materials exhibit varying viscosity and elasticity under different thermal conditions, automatically adjusting their energy dissipation characteristics to maintain optimal performance across varying environmental conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly enhances the rigidity and dynamic stability of the track structure, reducing material costs and environmental impact while maintaining high speed and load capacity, and allowing for efficient electric power distribution.
Implementation Method 1
The track structure is made in the form of a two-level string trussed structure... prestressed load-bearing members... zigzag-oriented rod elements... forming triangles
Implementation Method 2
the assembly connection of the transverse beam with the support is made as a pivot lever
Implementation Method 3
prestressed load-bearing members... prestressed power member... interconnected in spans... forming triangles
Data Source
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AI summary
The invention relates to the area of transport, particularly, the above-ground transport systems of string type with rail track structure related to overpass-type tracks, and can be used in development of both inner-city transport highways and in construction of intercity and international transport systems. The proposed string transport system by Yunitski comprises two rail cords of the lower (3) level of the track structure and above them two rail cords of the upper (4) level of the track structure mounted on the foundation (1) between anchor (2a) supports resting on the intermediate (2b) supports; made in the form of prestressed load-bearing members (5) enclosed in the corresponding bodies (6) with mating therewith rolling surfaces (7) for wheeled vehicles (8) and forming two tracks, interconnected in spans G between adjacent supports (2) by means of two-level trussed track structure in the form of zigzag-oriented rod elements (9), forming triangles with the rail cords of the lower (3) and upper (4) levels and positioned on the outer sides of those rail cords. At each level of the track structure, left and right rail cords are connected to each other by cross bulkheads (11) installed in junction units thereof with rod elements (9). Rail cords of lower (3) level are fastened on transverse beams (13), which are pivot-lever connected to supports (2) by means of assembly units (14), located in two vertical longitudinal planes N and M with the possibility of displacement along the axis of the track structure, whereas the transverse beams (13) are arranged at conjunction points of corresponding latitudinal planes W passing through junction units (12) and centers of supports, while vertical longitudinal planes A and B, containing junction units (12), are displaced relative to vertical longitudinal planes N and M, containing assembly units (14), by the defined distance L, m.