Editorial

Regular papers

The first paper, Calculation of Euler Angle of Matrix Displacement Method for Space Reticulated Shell, introduces a novel analytical approach to determining Euler angles for spatial rigid frame members in reticulated shells. By deriving specific formulations for cylindrical and spherical shells, the authors provide a direct, non-iterative method that enhances precision and computational efficiency compared with conventional commercial software approaches. This method facilitates a better fit between members and curved surfaces, enabling more accurate modelling of complex geometries.

The second paper, Evaluation of Traditional Iranian Architectural Arcs for Optimum Geometry Design of Single-Layer Diamatic Lattice Space Domes, bridges historical architectural wisdom and modern structural engineering. Drawing inspiration from the geometry of traditional Iranian domes and arches, the study demonstrates how these time-honoured forms can inform the design of efficient contemporary lattice space domes. Through comparative analysis using AutoCAD and SAP2000, the authors show that certain traditional arches allow for reduced material usage and increased structural height, illustrating the enduring relevance of historical design ingenuity.

In memory of Professor Hoshyar Nooshin: Futures of spatial structures

In memory of Professor Hoshyar Nooshin, who passed away on 4 October 2024, the International Journal of Space Structures has invited recipients of the Pioneers’ Award to contribute reflective research papers on the futures of spatial structures. These contributions, to be published across forthcoming issues, celebrate Professor Nooshin’s lifelong dedication to creativity, research and education.

This issue features two such papers.

The first, Geometrically Nonlinear Analysis of Thin-Shell Deployable Structures: NURBS-Based Isogeometric Elements Are Slower Than Standard Lagrange Polynomial Finite Element Formulations, by Narravula Harshavardhan Reddy and Sergio Pellegrino (Pioneers’ Award Winner 2002), offers a comparative investigation into computational performance between isogeometric and standard finite element methods for thin-shell deployable structures. Their findings reveal that, despite geometric precision, isogeometric elements can be computationally slower, offering valuable insights for practitioners seeking efficient modelling strategies.

The second paper, Weingarten Surfaces, the Codazzi Equations and the Membrane Theory for the Formfinding of Tension Structures, Shells and Vaults, by Emil Adiels and Chris J. K. Williams (Pioneers’ Award Winner 2021), provides a rich exploration of the geometric and physical principles underlying formfinding in tensile and shell structures. Through an elegant synthesis of differential geometry and membrane theory, the authors demonstrate how curvature and stress relationships can be used to generate efficient structural forms.

Personal reflection

For me, this issue holds a deep personal significance. My association with Professor Hoshyar Nooshin began in 2005 when I attended one of his short courses in Iran. His passion for teaching and his profound understanding of spatial structures inspired me to pursue further study under his supervision; first as a student on the MSc in Spatial Structures at the University of Surrey, then as his PhD student, and later as his colleague at Surrey since 2016, Figure 2.

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Figure 2.

Hoshyar Nooshin (right) and Alireza Behnejad at the University of Surrey in 2018.

Professor Nooshin was not only a brilliant academic and pioneer in the field but also a generous mentor and a unique presence in the lives of those who had the privilege to know him. His guiding principle in life was encapsulated in his simple yet profound motto: ‘Hope, Perseverance, and Acceptance’.

He taught that we must begin every endeavour with hope for the best outcome, persevere wholeheartedly in our efforts and accept whatever result follows – then, through that acceptance, renew our hope once again.

His intellectual legacy endures through his development of Formex Algebra, his visionary leadership of the Spatial Structures Research Cluster at the University of Surrey, and the founding of this very journal in 1985. His influence continues to inspire new generations of engineers and researchers across the world.

As we honour his memory through this special series, we also celebrate the spirit of innovation, rigour and optimism that defined his life and work. It is my hope that these contributions, and those that follow, will carry forward the ideals he so passionately upheld.