6/12/2023 0 Comments Elevator physics calculator![]() This paper describes how a computational environment is built from segments to achieve these targets. But a way is needed to test and demonstrate the effectiveness of different sway control strategies and to help the communication of experts in different fields. For instance, an approach which aims to optimize passenger ride comfort, traffic and building and rope sway has been presented, as well as an approach where rope sway is estimated in real-time based on car location to minimize impact on lift system performance. Since then, different ways of simulating the dynamic response of high-rise lift systems have been published, e.g., by Rafael Sánchez Crespo, et al., and the work to reduce the impacts of the software-based solution has continued to this day. ![]() In conclusion, Caporale anticipated that the hardware dampening strategy would become the preferred option, but the experience of the authors suggests that software solutions have become the industry standard. The speed reduction by software, and ultimately the cessation of lift service in severe conditions, can lead to loss of revenue and make areas of the building less desirable and less valuable to building owners. ![]() The drawback of the hardware solution is that effective dampening of suspension and compensation ropes on both the car and counterweight side requires complex arrangements, which are costly to produce, install and maintain. Caporale described in his dissertation in 2000 the challenges of traditional approaches by lift engineers to tackle rope sway either the rope sway in lift ropes is dampened by hardware, or the speed of the lifts is reduced by software. The problem is particularly challenging because it involves multiple disciplines, e.g., mechanical, electrical and control system design of the lift, lift traffic planning, wind engineering and building structural engineering. The trend for tall and slender buildings creates unique challenges in maintaining a good lift service while also preserving high passenger comfort and safety. This later trend is driven by high city-center land value, its scarce availability, development in engineering techniques and aesthetic trends. The trend of building taller has been combined with a trend of creating super-slender buildings. ![]() This environment can be used to predict lift system performance on future buildings and to test the efficiency of different sway control strategies, and the visualization of results allows effective communication between different parties in high-rise building projects. All simulations are based on the modeling of physical events. The third part consists of the rope sway analysis tool, which provides precalculated amplification data for the real-time calculation model, the full-scale rope sway simulation tool, which acts as a reference for result validation, and the building motion calculator. This model forms the second part of the environment, and it calculates rope amplitudes based on recorded or simulated building motion and car position from the main model and determines the appropriate operational model. It also implements the operational mode it receives from the real-time rope sway calculator. The first part consists of the main lift model, which utilizes the building and lift data and is able to run the lift, based on recorded or simulated lift calls. This article explains how a computational environment that models a lift system in building sway conditions is built based on a segmented approach. Therefore, there is a strong demand on the one hand to maximize lift service availability as long as it is safe, and on the other hand, to demonstrate the impact of sway countermeasures on the performance of the lift system in advance. The lift performance may need to be reduced or the lift service may even need to be suspended in severe conditions however, since lifts are a key service of a building, any reduction in their performance may cause substantial loss of revenue. In high-wind conditions, tall buildings are subjected to sway, which creates a challenge in maintaining passenger comfort and safety. Keywords: High-rise Lift, Sway, Traffic, Simulation Abstract This paper was first presented virtually at the 12th Lift & Escalator Technologies Symposium in September 2021 and printed at the symposium website at.
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